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For my coming Jabba's palace I've built some technical device. I've made an instruction to see how I used some SNOT-techniques.
After toddling around for years with different systems, I finally have a collection of devices that suit my taste;
-Vintage late 70's Akai Direct drive, auto return AP-206C turntable.
-Late 90's Denon AV surround receiver AVR-1801
-Mid 90's Yamaha CDX-480 cd player
-Late 90's Denon DRW-585 double cassette player
- Vintage 70's 484 Philips front speakers
-Vintage mid/late 80's Philips DRC MK2 rear speakers (not on the pic).
Just the stuff I need to annoy the neighbours ;P
I guess occupational health and safety hadn't been invented yet!
Assuming this deadly device is real of course!
DEMENTIA TABLEAU
Suspension Chair
Modified armchair and shower stool. Personal articles left by an elderly female dementia victim compose the imagery of custom designed/ printed upholstery fabric
Fragmented Patchwork: Granny Square Composite
Found clothing sewn to crocheted squares of recycled clothing, created in part by community workshop attendees
Holding On: A Life Jacket
Altered vintage life jacket, detailed with crocheted thread, nylon, personal mementos and watches
Floating
Lambda platinum print encased in acrylic: life-sized, photographic ‘preserved specimen’ from Dementia Tableau Suspension Chair fabric
Unanswered
Headphones; audio recordings and sound compositions: Mothers and Daughters, Crossword Alzheimer’s
An overstuffed armchair and shower stool/ottoman might offer respite for our dementia or Alzheimer’s sufferer or caretaker. But this seat is ripped open with springs exposed; stuffed with clock and watch parts. Colorful fabric printed with jumbled female clothing— floating nighties, robes, socks —covers this chair, while the cushion on the floor is tethered loosely to the leg by a coiled rope. For, this “seat cushion is also a floatation device.”
Life-sized printed photographs of the same clothing covering the chair are encapsulated in acrylic, like specimens in a medical museum. Hovering directly on the wall are shredded garments and kept mementos crocheted into traditional ‘granny squares.’ This is literally and figuratively a fragmented history – the patchwork of an individual mind, a lost generation of craft. Similarly, an uplifted life preserver is offered to keep the patient or caretaker from drowning in dissolving memories, but alas, it is bound and laden with the detritus of the everyday.
While Alzheimer’s is a degenerative neurological disease, multi-infarct dementia (MID) is a vascular disorder that can result from depression, chronic drug use, and infections such as HIV; and can cause multiple strokes. Rates of Alzheimer's may be rising due to a growing aging population, but other major contributing factors remain a mystery.
What is clear is that women are at the center of this epidemic. A recent study jointly commissioned by the American Alzheimer’s Association and Maria Shriver‘s A Woman’s Nation found that 2/3 of all Alzheimer’s patients are female. This is only part of the story, as most of the 43.5 million Americans providing unpaid care for their relatives are also women.
A small tableau element represents hope for a cure, however. Rather than initials, the embroidered monogram on the slippers, “BACE, ” stands for beta secretase enzymes, contributors to the production of the plaques that cause nerve damage in Alzheimer’s. Experimental drugs to block this enzyme (BACE inhibitors) could slow or stop the disease – exciting research that may result in longer, more productive and happy lives.
Laser Devices DBAL-A2 on a Samson Evolution with Troy Folding Sight, Surefire MB556K, Sabre 14.5'' 5.56mm Barrel and Surefire Scoutlight. LaRue QD Mount.
A number of NBC News producers have this little device on their desks in the new 4th floor NBC News/MSNBC Operations Center. It seems to be a type of face-to-face conferencing unit, connected through an RG-45 ethernet cable on the back. Labelled 'ComScreen', the device has a touchscreen display which indicates various connected locations; possibly previously contacted sites this user has connected with. There is a small camera at the top of the unit and a speaker on the left side. A microphone appears to occupy a position at the bottom, along with audio volume controls. The device is manufactured by Intracom Systems:
Note: John faced some cancer in 2015. Sondra is his wife...
How tardy and bizarrely uncharacteristic of me to "come up short" Carol, on the genealogical history of the deceased equine entity called Tony.
Actually the initial send had more text....in my whimpering inadequacies.... I encountered a road block that was insurmountable for my chemo-laced brain.....I cried until Sondra came to my mewling puddle of shameful "masculine-tech" whining on the floor.....she tried to solve the dilemma .....and had "lift-off" for only a portion of the rocket.....basically it was a cluster fuck, a message that was intended for one planet.....but the message splintered,........you received some of the text, and some of it will arrive on Saturn's second inner ring, around 2525. The video that I tried to include with the text....imploded, folding in-ward unto itself.....consuming its life and frames until it resembled a tiny black jube-jube lying on the sidewalk.........not even the slugs were interested.
Tony was 22 when he died.....born in Saskatchewan......had papers.....not the kind of papers that illegal refugees have....but papers that proved he was pure Percheron. Tony was and is the only papered horse we have ever owned. Both his parents....sire and brood mare were registered Percheron. Percheron is a French heavy horse breed.....that basically opened the west, plowed the soil and pulled the goods.
In my world, being papered and registered means nothing....what does matter .......do I like what I see. And with Tony ....it was all good.
I'n John R's world of horses, registered and papered has meaning.
Sondra and I bought Tony along with another horse named Spider.....they were a team.....had worked as a team, pulling wagons and sleighs and also as a logging team for a teamster/logger/farmer/truck-driver from the 100 Mile House area of BC's Caribou region. Spider was a giant of a horse, also Percheron, not registered and not papered. Spider weighted about a ton, Tony was around 1800 lbs......
Spider was tall, quite a bit taller than Tony, so they looked a bit mis-matched....both horses were black as coal..........Tony had one white sock, rear right, if you are looking up the dirt chute........and both had their tails docked.... I'm not a fan of docked tails, but that's the way they came.
The year was 2004, when we heard about these boys being available.....we already had a team.....two wonderful Belgian/Percheron crosses, both unpapered and un-registered, that were named Pat and Mike, that we bought in 1999.
We were thinking of easing up on using Pat and Mike, as we were logging quite a bit. We wanted a younger team.....and Tony and Spider were around 10 ......a little side bar to horse trading.....a horse trader if he's trying to sell a horse , when confronted with the question .....
"so, how old is this horse"......will almost always tell you, he's 9. (old enough to know better but young enough to be strong and eager)(keep that in mind Carol, when it comes time to trade the old boy in)
To really know how old a horse is.....you look at his teeth, and if you know how to read the markings on their teeth, you can come to within a year or two. Many a 9 year old has turned out to be 17 or even older.
Sondra and I heard about the big blacks being for sale.....made some time to come up from the farm to have a look.
Always an adventure....searching out horses.
So up to the 100 Mile House area.....it was early summer....this area, high in elevation, excels in showing its beauty during the summer. It's sparsely populated.....a few small towns dot the region, to offer commerce and alcohol......the area is home to ranches, lots of large acreages, raising and growing beef..... As well as the ubiquitous logging industry.......give us some trees to exploit.
It's a gorgeous part of the province Carol, a high plateau, spotted with numerous lakes, expansive lodge pole pine forests, and these old, well worn ranch settlements.
It was one of these ranches that Tony and Spider were residing ......log house, log out-buildings, log fences, log barn.........right on the edge of a good sized lake.
Tom the owner was ready for us when we arrived....horses were at the hitching rail....harnessed and ready to perform.
But you never jump right into the task at hand .....you have to have the BC chats first.....sort of like kicking the tires when you are looking to buy a "new to you" truck......so the three of us are walking around the horses, hands running over their bodies, asking questions that don't always pertain to horses, "do you know such and such, he has a logging team near Princeton"......." where did these boys come from"...."when did you last use them"....."any problems"....."how are their feet"........"do these boys come with the harness"..... "how long have you lived up here"......."no kidding, I know Ted Guisbrech, we logged together over near Rock Creek".........and so on.
Then .....you ask if it would be ok to see them walk around.........he may say sure, take the lines, or he may say....sure, let me walk them first and then you can have a go.
All this seemingly unimportant prater......registers...it is all telling us about his relationship with his horses.....does he want to make sure the horses are calmed down when it comes time for us to drive them, .......does he think they might be a bit spooky if we take the lines.....is he setting the standard by showing us how he handles them.....all part of the game.
I want him to walk the horses around, to see what kind of relationship he has with them.....how he holds the lines ......where he stands.....how he gets them to move, does he "kiss them up", or "click" them up .....(two very distinct sounds in the horse world)....or does he remain silent, and communicate through the lines.....do they move on their own, when he grabs the lines......does he say their names to get them to move.......does he hold the lines....firm.......loosely.....does he slap the horses rears with the lines to get them to walk.....all of this shows me how this guy gets along with his horses.....gentle, coarsely, frantic, lazy, attentive, casual, ....and this gives me some incite into what we might be buying.
It's such a dance.....you want it to fall into place....you've invested 6 hours of travel one way......you like the initial viewing.....you need a team .....you want it to work. The foot work, the rhythm, the music, the touch, all these "things" need to be right for the dance to feel good...the flow....and eventually the coupling.
Where was I. .....oh yea.... Tom is walking the boys around, they have their harness on, the harness is well worn, with some minor binder-twine fix-it's......binder-twine....the non-natural material they use to tie bales of hay with.....it is ubiquitous with the horse world.....binder-twine is the rural duct-tape....you use it everywhere to tie down, to tie up, to keep apart, to shorten and to lengthen, you use it for clothes lines, and dog leashes, you use it to mark the planting lines for lettuce and carrots.....It almost always comes in the colour orange.....but now they have introduced the colour blue. It the very old days they used wire to wrap bales.
Tom walks the boys around the corral.....whoa-ing them up then asking them to step up(move ahead).....making them "gee" and "haw".....right and left......I watch how his hands work the lines.....lightly.....aggressively.....does he verbally communicate or is it all done with touch (pressure with the lines)......so the lines are long strips of leather or polypropylene that are attached to the bridle, a sort of head set that has the bit, the metal bar that is inserted to the horses mouth, attached to......so every time you pull on the lines it activates the bit......in a good or bad way.....gentle with the lines equates to gentle with the bit......aggressive with the lines, equates to harsh rough bit movement..........I'm certain Carol you've experienced this with the Hun. To get his attention (his noodle buried in a Conan movie) you sometimes have to jerk his bit.
So what you want to see as a perspective buyer, is the owner driving the horses around in a calm atmosphere.....no rodeos.....using "soft" hands........you want the horses displaying a zen.......a zone where they are willing to do what you ask of them.
Think Pointer Sisters......."I want a man with a slow hand....I Want a lover with an easy touch. I want a lover who will take some time. Not come and go in a heated rush"
Now that's what makes a perfect teamster.......Sondra points out that in the equine world, every teamster thinks he has soft hands. Phew, was that air leaving my body!
Then we attach the horses to the double-tree......sometimes made from hard wood and now usually made from metal.....this is the devise that is attached to two big leather straps that are attached to the horses harness.....these straps are called tugs....and then the double tree is attached to the device you want the horses to pull....ie. a wagon, a sleigh, a rake, a mower, or for our purposes a log. The double tree drags on the ground, so sometimes does not drag smoothly, as it gets caught up on debris , small babies, stumps, empty beer cases, that sort of thing......logging horses get acclimatized to this irregular pull and constant clanging, and are not spooked by the sound or pull.....uninitiated horses go ballistic....as they can never run away from the ragged feel, and the scary sound.
Tony and Spider were great.....and after numerous manoeuvres and requests.....lots of backing up, going forward.....asking them to take one step forward and whoa......asking them to stand while putting the lines on the ground......some horses will creep forward....
hooking them up to a big log and pulling it around.....doing the same tasks that we asked of them without the log..... we put them back to the hitching rail......removed their harness.
I ask Tom how "they load"......how easily do they go in a trailer.....a very important feature.....especially for people who move their horses around....like horse loggers.....always going to different sites.......some horses react to trailers like a 9 year old boy going to the dentist.....it can be hell.....and I've participated in many "rodeos" trying to get unwilling horses in a trailer. Both hard on the horse and the handler. Feet stepped on, smashed around by hyper animals, and that's before you get them in the trailer..... Securing them in the trailer is even more ramped up in terms of activity. So having calm, easy going horses to load...can be the deal sealer or breaker.Tom assures me that they "load easy"
We let the horses cool down......and then I picked up every foot......you want a cooperative horse when trimming hooves.....looked in their mouths to check teeth......hands feeling all over their bodies.....feeling and looking for bumps, irregularities, sores.....seeing how the harness fits them, any rubs, buckle wear, .......you try and do a full inspection..........just like the 50 point checkup that your Audi receives every 6 months.
For me it's all fun.....a chance to visit with another teamster.....to check out his stock....see new country.... hear some new lies and stories.
All the while the test drive and chit-chat is happening, Sondra and I are communicating about what we think about the team.....likes and dislikes....this is all done without talking....it's done with eyes, eye brows, facial wrinkles, nostril flares, smiles, hands, and head nods.....we don't want to diss the owner about the abilities of his team, or challenge anything he says about them.....we just register silently the good and bad......we didn't drive 6 hours to tell someone they have a badly mannered team of horses. It's a sort of rural respect and politeness that seems to prevail in rural Canada.
More generalized talk takes place....we find out more about his place.....some of the jobs he did with the team.....his daughter comes out of the house and jumps up on a saddle horse and rides around.....learn that he's bought a truck and car wash in 100 Mile House.....very entrepreneurial ...... He wanders off to feed some animals.... And Sondra and I kick a few horse buns around and decide yes, we want the team......
The negotiations are straight forward....we pay $4000....
In most horse transactions you buy the horse and the seller provides you with a halter and a lead rope......usually the most worn out and manure stained ones he can find in the tack shed.....often repaired with binder-twine, that use to be orange.
We manage, through friendly haggling, to get the harness, a double tree, and some pieces of harness "thrown in" with the 4 grand. We are happy with the deal, he's happy with the deal.
He agrees to feed the horses for a week, and Sondra and I will return the following weekend with our horse trailer, pick them up and bring them to Trinity Valley.
This adventure was wonderful.....a great way to start a new relationship with a new team......we were anxious to play with them, learn more about them.......and see what they could do.
The boys turned out to be all we wished for.....great addition to our already mature and well behaved team of Pat and Mike.....
Spider as he got older developed a rear hip malfunction.....that eventually made it very difficult for him to get up, after he would lie down for a rest and or a roll. At the end I was having to lift him up with the tractor....too complicated to describe, believe me it was as hard on me as it was on Spider.....Spider learned not to lie down too much .....and when he did, he'd try to position himself strategically on a slope so when it was time for lift-off, gravity would help. One time Spider lay down in his corral....winter time....in a hollow and couldn't rise up......thrashed around for awhile, making his bed a skating rink....total ice, caused by his body heat, ..... and even more difficult for him......finally as darkness was settling in I managed to get him up......this was becoming a problem.
In spring time I had a chat with the big boy......I was tiring of the effort it took to get him back up on all "four"...... Eventually the time came and he had his final lie-down.......
After Spider died, Tony was confused and then sad.....no more mate.....these horses when they are teamed up.....often act as one......they eat side by side, they rest side by side......when one heads off in a direction, the other one will follow......when one decides to let it all out and race around the field, full throttle, the other one copies. They are often joined at the hip. So Tony was bummed when Spider passed on, ........and he got little sympathy from the other team......at this point on the calendar, our original team of Pat and Mike, had both died, and we had bought another team, Jackie and Star, younger than both Spider and Tony, and this new team became our "go to team".
Jackie and Star, also Percheron's, also black, but with un-cropped tails, dragging on the ground, beautiful, true warriors......Don Monjoy was so proud of us for staying black, and staying Perch......this team was young, bold, frisky, and dominating. So Tony went to the bottom of the pecking order, and just wasn't too sure where he fit in. Sondra and I continued to show love and attention his way.....and Sondra would harness him and drive him around, but we always felt he was somewhat confused.......and missing his mate. But through that wondering, he was always a treat to be around.....he was extremely handsome.....very curious.....enormously smart.........and we always said he had a great ass.... And we will miss him.
Well now he can rejoin Spider......they can be a team again.
Computer and human interface will probably one of the most important areas of development in next few decades. While we work to master our skills to make computers work for us more efficiently, and double processing power every 18month, little we have seen to improve our direct interaction with computers. What we have seen is form factor changes (tablet/smart phone), introduction to motion sensing input (Kinect), use of GPS, accelerometer, google goggle, google glass, etc. In my opinion we probably took a step back by heavily depending touch keyboards moving away from using 10 fingers (QWERTY keyboard) to 2 fingers. Fashion statements have become one of the key driving factors in the market. Most of our attempts to make handwriting recognition popular were never successful.
Read the full blog at
tektab.com/2012/05/23/the-future-of-computer-human-interf...
algerian polymath ∋vitruc, though born into poverty, rose in influence and power through his revisioning of janissarian tactics, demonstrating uncommon military brilliance and innovation. initially forced because of his age (estimated to be 13 at his first foray) to filter his instructions through a "ghost", an older, mildly disabled war veteran, his identity was discovered upon investigation of the death of said ghost. still a very young man (14 or 15; sources differ), he was challenged by pasha to prove his competence in developing strategy for a pending battle. ∋vitruc agreed, making a request that no opposing soldiers be killed unnecessarily, and that all armaments and gear obtained from the defeated be given him to study. upon the rout of the enemy battalion (again, sources differ alarmingly here, showing much personal bias among historians), ∋vitruc was awarded his prize, along with two captured soldiers, now his servants.
these servants, whom he'd personally selected, were reputed to become his advisors and reporters of the mysterious scientific innovations of foreign lands. though the empire was powerful, suspicion of great weaponry possessed by the enemy haunted the upper classes, and ∋vitruc's youthful intelligence was given unprecedented freedom to spend and explore. retiring with his servants to a remote valley some distance from oran, he spent some time refining (and re-refining) his own astonishingly accurate (and lethal) modifications to the arquebus, eventually earning the undying gratitude of the pasha for more than tripling the range of the firearm. as a result, the empire went unchallenged with any seriousness for many years.
his true reasons for retiring to the privacy of the countryside, however, were only revealed upon the eve of what has been recorded as his death (in or around 1623), but was really what more modern biographers now call his grand escape. algeria began to suffer from the effects of plague in 1620, and though he felt safe in his sheltered valley, ∋vitruc realised that terrible disease could strike at any time (his theories on epidemiology, though noted here, will have to wait to be discussed). none of his drawings survive (disputed; no paper record exists), but he was rumoured to have been fascinated by the constellations and from a very early age built odd devices (described as witches' clouds) that clearly must have been balloon prototypes. cave drawings estimated to be from his era (and in a valley not far from oran) show odd craft in the sky, in both day and night - historians again squabble here, as the drawings are crude and ∋vitruc was widely known to be a meticulous and exemplary artist. some agreement can be established that it was his servants who did the scribbling while he worked, and he possibly took his paperwork with him.
unsatisfied with paper aircraft, ∋vitruc began working with metal constructs he believed would fly through the air and carry weaponry, people and any and all matter of goods. documents survive in algiers, written by his detractors (and those who politically opposed his funders) that mock his impossible dream of levitating rocks, metals and minerals. ∋vitruc's legend and value as a miltary innovator protected him, though, and only the most polite needling of his dreams seems to have been allowed. some more serious criticism came in the form of questioning his use of valuable materials (notably silver and gold), which he was reputed to be experimenting with and destroying in vast amounts. there is evidence that at least two attempts were made by brigands to steal from him, but his weaponry was very greatly feared and respected (and his location secret and remote), so it's doubtful any dent in his resources was made.
the golden orb, shown above, is one of the few remaining devices he developed. with plague threatening his land (one of the servants is said to have become quite ill or died in 1622), ∋vitruc boarded his experimental metal craft and is said to have floated or flown away over the mediterranean sea. his surviving servant, when questioned, was barely believed, and he indicated that ∋vitruc had packed all of his remaining machines, along with some food, before departing. envoys of the pasha delivered the news, and in a fury, believing ∋vitruc had simply stolen all the wealth allowed him (not more than a few ounces of gold and silver remained), the story of his death was summarily spread.
the orb, once in the possession of the musée des arts et métiers (museum of arts and crafts) in paris, france, was lost and presumed stolen in 1804. a daguerreotype (dated 1850) of an unnamed man standing beside it surfaced in 1948, but no location could be determined. its existence on the grey market is, however, an open secret, and though algerian nationalists have made strong claims that the orb be repatriated, other pressing matters have consistently stifled the issue.
shown here is the orb attached sideways to a support structure, for no reason other than the whim of the current owner (and perhaps a slight attempt to disguise it, as it is on somewhat open display). the mechanical works are unfortunately not shown and may be missing entirely, though i was not allowed to touch, approach or examine the orb. photographing it was forbidden for the few years i knew of its location, until just recently, and i was required to both obscure all background details and surrender the memory card of my camera after downloading and editing this one shot. for obvious reasons, i cannot geolocate the orb on any map.
*** February 15th 2011 1,000 Views***
Views of the Japanese Garden, The device on the left is a lantern, known as a dai-doro. This represents the 5 elements of Buddhist cosmology (earth, water, fire, air, spirit)
Location : Al Kout Souq Shopping Mall , Fahaheel, Kuwait .
Device : Nikon D300
Note :Best viewed in the large format better view
More about Al kout Souq : maps.google.com/maps?hl=en&safe=active&um=1&i...
© 2010 Saad Al-Enezi
A number of years ago, I was playing tennis with my mate and we got talking about how my wife was complaining about my snoring. For more information please visit: www.resmed.com/in/en/consumer/snoring/how-to-stop-snoring...
#Microsoft Windows 10 Event
To maximize the use of the new operating system “Windows 10” Microsoft has unveiled devices under the #event named Microsoft Windows 10 devices event”
In this Event it has revealed its first ever #laptop and two new brand #smartphones with #Windows10 operating system.
Microsoft’s first laptop, the surface book, built with a detachable screen, sixth generation #Intel processor, 13.5 inch and 12 hours battery back up
Along with its surface book it has show cased 2 new #lumia handsets with windows 10 operating system namely lumia 950 and 950 xl whereas 950 screen size is 5.2 inch Hd screen and 20 mega pixel camera and 950 Xl has 5.7 –inch screen
The main high light of both smart phones can be connected by a small portable display dock accessory into a personal computer. A keyboard or a mouse can be connected, Expanding the capacity of the smart phone to operate like a personal computer
Isn’t that interesting…?? To know more about Microsoft Windows 10 device event check this video www.microsoft.com/october2015event/en-us/live-event
The Naked 3D Fitness Tracker goes on pre-request appears to be ready to change your entire body estimation game. It is a beautiful, cutting edge, flawlessly outlined framework saddled with a sketchy name. The apparatus is in general made of an extraordinary mirror glass that outfitted with depth...
Check the pic of the device Cedar Ridge Wx for today: ift.tt/1Ua11jw at: January 19, 2016 at 03:56PM
Two-car Class 156 'Super Sprinter' DMU 156 480 rumbles through Kirkby-in-Furness station, a deserted request stop, whilst forming Northern Rail's 07.41 (SaO) Barrow-Sellafield service. @07.52
FDA-approved sharps disposal containers are made with puncture and leak-resistant plastic. The agency recommends that sharps - like needles, syringes, lancets and other devices used at home to treat diabetes, arthritis, cancer, and other diseases - be immediately placed after use in one of these containers. For more information about safe sharps disposal, visit www.fda.gov/safesharpsdisposal.
Experiment with converted IR camera using a polarizing filter and HDR software. AEB +/-2 total 3 exposures processed with Photomatix.
High Dynamic Range (HDR)
High-dynamic-range imaging (HDRI) is a high dynamic range (HDR) technique used in imaging and photography to reproduce a greater dynamic range of luminosity than is possible with standard digital imaging or photographic techniques. The aim is to present a similar range of luminance to that experienced through the human visual system. The human eye, through adaptation of the iris and other methods, adjusts constantly to adapt to a broad range of luminance present in the environment. The brain continuously interprets this information so that a viewer can see in a wide range of light conditions.
HDR images can represent a greater range of luminance levels than can be achieved using more 'traditional' methods, such as many real-world scenes containing very bright, direct sunlight to extreme shade, or very faint nebulae. This is often achieved by capturing and then combining several different, narrower range, exposures of the same subject matter. Non-HDR cameras take photographs with a limited exposure range, referred to as LDR, resulting in the loss of detail in highlights or shadows.
The two primary types of HDR images are computer renderings and images resulting from merging multiple low-dynamic-range (LDR) or standard-dynamic-range (SDR) photographs. HDR images can also be acquired using special image sensors, such as an oversampled binary image sensor.
Due to the limitations of printing and display contrast, the extended luminosity range of an HDR image has to be compressed to be made visible. The method of rendering an HDR image to a standard monitor or printing device is called tone mapping. This method reduces the overall contrast of an HDR image to facilitate display on devices or printouts with lower dynamic range, and can be applied to produce images with preserved local contrast (or exaggerated for artistic effect).
In photography, dynamic range is measured in exposure value (EV) differences (known as stops). An increase of one EV, or 'one stop', represents a doubling of the amount of light. Conversely, a decrease of one EV represents a halving of the amount of light. Therefore, revealing detail in the darkest of shadows requires high exposures, while preserving detail in very bright situations requires very low exposures. Most cameras cannot provide this range of exposure values within a single exposure, due to their low dynamic range. High-dynamic-range photographs are generally achieved by capturing multiple standard-exposure images, often using exposure bracketing, and then later merging them into a single HDR image, usually within a photo manipulation program). Digital images are often encoded in a camera's raw image format, because 8-bit JPEG encoding does not offer a wide enough range of values to allow fine transitions (and regarding HDR, later introduces undesirable effects due to lossy compression).
Any camera that allows manual exposure control can make images for HDR work, although one equipped with auto exposure bracketing (AEB) is far better suited. Images from film cameras are less suitable as they often must first be digitized, so that they can later be processed using software HDR methods.
In most imaging devices, the degree of exposure to light applied to the active element (be it film or CCD) can be altered in one of two ways: by either increasing/decreasing the size of the aperture or by increasing/decreasing the time of each exposure. Exposure variation in an HDR set is only done by altering the exposure time and not the aperture size; this is because altering the aperture size also affects the depth of field and so the resultant multiple images would be quite different, preventing their final combination into a single HDR image.
An important limitation for HDR photography is that any movement between successive images will impede or prevent success in combining them afterwards. Also, as one must create several images (often three or five and sometimes more) to obtain the desired luminance range, such a full 'set' of images takes extra time. HDR photographers have developed calculation methods and techniques to partially overcome these problems, but the use of a sturdy tripod is, at least, advised.
Some cameras have an auto exposure bracketing (AEB) feature with a far greater dynamic range than others, from the 3 EV of the Canon EOS 40D, to the 18 EV of the Canon EOS-1D Mark II. As the popularity of this imaging method grows, several camera manufactures are now offering built-in HDR features. For example, the Pentax K-7 DSLR has an HDR mode that captures an HDR image and outputs (only) a tone mapped JPEG file. The Canon PowerShot G12, Canon PowerShot S95 and Canon PowerShot S100 offer similar features in a smaller format.. Nikon's approach is called 'Active D-Lighting' which applies exposure compensation and tone mapping to the image as it comes from the sensor, with the accent being on retaing a realistic effect . Some smartphones provide HDR modes, and most mobile platforms have apps that provide HDR picture taking.
Camera characteristics such as gamma curves, sensor resolution, noise, photometric calibration and color calibration affect resulting high-dynamic-range images.
Color film negatives and slides consist of multiple film layers that respond to light differently. As a consequence, transparent originals (especially positive slides) feature a very high dynamic range
Tone mapping
Tone mapping reduces the dynamic range, or contrast ratio, of an entire image while retaining localized contrast. Although it is a distinct operation, tone mapping is often applied to HDRI files by the same software package.
Several software applications are available on the PC, Mac and Linux platforms for producing HDR files and tone mapped images. Notable titles include
Adobe Photoshop
Aurora HDR
Dynamic Photo HDR
HDR Efex Pro
HDR PhotoStudio
Luminance HDR
MagicRaw
Oloneo PhotoEngine
Photomatix Pro
PTGui
Information stored in high-dynamic-range images typically corresponds to the physical values of luminance or radiance that can be observed in the real world. This is different from traditional digital images, which represent colors as they should appear on a monitor or a paper print. Therefore, HDR image formats are often called scene-referred, in contrast to traditional digital images, which are device-referred or output-referred. Furthermore, traditional images are usually encoded for the human visual system (maximizing the visual information stored in the fixed number of bits), which is usually called gamma encoding or gamma correction. The values stored for HDR images are often gamma compressed (power law) or logarithmically encoded, or floating-point linear values, since fixed-point linear encodings are increasingly inefficient over higher dynamic ranges.
HDR images often don't use fixed ranges per color channel—other than traditional images—to represent many more colors over a much wider dynamic range. For that purpose, they don't use integer values to represent the single color channels (e.g., 0-255 in an 8 bit per pixel interval for red, green and blue) but instead use a floating point representation. Common are 16-bit (half precision) or 32-bit floating point numbers to represent HDR pixels. However, when the appropriate transfer function is used, HDR pixels for some applications can be represented with a color depth that has as few as 10–12 bits for luminance and 8 bits for chrominance without introducing any visible quantization artifacts.
History of HDR photography
The idea of using several exposures to adequately reproduce a too-extreme range of luminance was pioneered as early as the 1850s by Gustave Le Gray to render seascapes showing both the sky and the sea. Such rendering was impossible at the time using standard methods, as the luminosity range was too extreme. Le Gray used one negative for the sky, and another one with a longer exposure for the sea, and combined the two into one picture in positive.
Mid 20th century
Manual tone mapping was accomplished by dodging and burning – selectively increasing or decreasing the exposure of regions of the photograph to yield better tonality reproduction. This was effective because the dynamic range of the negative is significantly higher than would be available on the finished positive paper print when that is exposed via the negative in a uniform manner. An excellent example is the photograph Schweitzer at the Lamp by W. Eugene Smith, from his 1954 photo essay A Man of Mercy on Dr. Albert Schweitzer and his humanitarian work in French Equatorial Africa. The image took 5 days to reproduce the tonal range of the scene, which ranges from a bright lamp (relative to the scene) to a dark shadow.
Ansel Adams elevated dodging and burning to an art form. Many of his famous prints were manipulated in the darkroom with these two methods. Adams wrote a comprehensive book on producing prints called The Print, which prominently features dodging and burning, in the context of his Zone System.
With the advent of color photography, tone mapping in the darkroom was no longer possible due to the specific timing needed during the developing process of color film. Photographers looked to film manufacturers to design new film stocks with improved response, or continued to shoot in black and white to use tone mapping methods.
Color film capable of directly recording high-dynamic-range images was developed by Charles Wyckoff and EG&G "in the course of a contract with the Department of the Air Force". This XR film had three emulsion layers, an upper layer having an ASA speed rating of 400, a middle layer with an intermediate rating, and a lower layer with an ASA rating of 0.004. The film was processed in a manner similar to color films, and each layer produced a different color. The dynamic range of this extended range film has been estimated as 1:108. It has been used to photograph nuclear explosions, for astronomical photography, for spectrographic research, and for medical imaging. Wyckoff's detailed pictures of nuclear explosions appeared on the cover of Life magazine in the mid-1950s.
Late 20th century
Georges Cornuéjols and licensees of his patents (Brdi, Hymatom) introduced the principle of HDR video image, in 1986, by interposing a matricial LCD screen in front of the camera's image sensor, increasing the sensors dynamic by five stops. The concept of neighborhood tone mapping was applied to video cameras by a group from the Technion in Israel led by Dr. Oliver Hilsenrath and Prof. Y.Y.Zeevi who filed for a patent on this concept in 1988.
In February and April 1990, Georges Cornuéjols introduced the first real-time HDR camera that combined two images captured by a sensor3435 or simultaneously3637 by two sensors of the camera. This process is known as bracketing used for a video stream.
In 1991, the first commercial video camera was introduced that performed real-time capturing of multiple images with different exposures, and producing an HDR video image, by Hymatom, licensee of Georges Cornuéjols.
Also in 1991, Georges Cornuéjols introduced the HDR+ image principle by non-linear accumulation of images to increase the sensitivity of the camera: for low-light environments, several successive images are accumulated, thus increasing the signal to noise ratio.
In 1993, another commercial medical camera producing an HDR video image, by the Technion.
Modern HDR imaging uses a completely different approach, based on making a high-dynamic-range luminance or light map using only global image operations (across the entire image), and then tone mapping the result. Global HDR was first introduced in 19931 resulting in a mathematical theory of differently exposed pictures of the same subject matter that was published in 1995 by Steve Mann and Rosalind Picard.
On October 28, 1998, Ben Sarao created one of the first nighttime HDR+G (High Dynamic Range + Graphic image)of STS-95 on the launch pad at NASA's Kennedy Space Center. It consisted of four film images of the shuttle at night that were digitally composited with additional digital graphic elements. The image was first exhibited at NASA Headquarters Great Hall, Washington DC in 1999 and then published in Hasselblad Forum, Issue 3 1993, Volume 35 ISSN 0282-5449.
The advent of consumer digital cameras produced a new demand for HDR imaging to improve the light response of digital camera sensors, which had a much smaller dynamic range than film. Steve Mann developed and patented the global-HDR method for producing digital images having extended dynamic range at the MIT Media Laboratory. Mann's method involved a two-step procedure: (1) generate one floating point image array by global-only image operations (operations that affect all pixels identically, without regard to their local neighborhoods); and then (2) convert this image array, using local neighborhood processing (tone-remapping, etc.), into an HDR image. The image array generated by the first step of Mann's process is called a lightspace image, lightspace picture, or radiance map. Another benefit of global-HDR imaging is that it provides access to the intermediate light or radiance map, which has been used for computer vision, and other image processing operations.
21st century
In 2005, Adobe Systems introduced several new features in Photoshop CS2 including Merge to HDR, 32 bit floating point image support, and HDR tone mapping.
On June 30, 2016, Microsoft added support for the digital compositing of HDR images to Windows 10 using the Universal Windows Platform.
HDR sensors
Modern CMOS image sensors can often capture a high dynamic range from a single exposure. The wide dynamic range of the captured image is non-linearly compressed into a smaller dynamic range electronic representation. However, with proper processing, the information from a single exposure can be used to create an HDR image.
Such HDR imaging is used in extreme dynamic range applications like welding or automotive work. Some other cameras designed for use in security applications can automatically provide two or more images for each frame, with changing exposure. For example, a sensor for 30fps video will give out 60fps with the odd frames at a short exposure time and the even frames at a longer exposure time. Some of the sensor may even combine the two images on-chip so that a wider dynamic range without in-pixel compression is directly available to the user for display or processing.
en.wikipedia.org/wiki/High-dynamic-range_imaging
Infrared Photography
In infrared photography, the film or image sensor used is sensitive to infrared light. The part of the spectrum used is referred to as near-infrared to distinguish it from far-infrared, which is the domain of thermal imaging. Wavelengths used for photography range from about 700 nm to about 900 nm. Film is usually sensitive to visible light too, so an infrared-passing filter is used; this lets infrared (IR) light pass through to the camera, but blocks all or most of the visible light spectrum (the filter thus looks black or deep red). ("Infrared filter" may refer either to this type of filter or to one that blocks infrared but passes other wavelengths.)
When these filters are used together with infrared-sensitive film or sensors, "in-camera effects" can be obtained; false-color or black-and-white images with a dreamlike or sometimes lurid appearance known as the "Wood Effect," an effect mainly caused by foliage (such as tree leaves and grass) strongly reflecting in the same way visible light is reflected from snow. There is a small contribution from chlorophyll fluorescence, but this is marginal and is not the real cause of the brightness seen in infrared photographs. The effect is named after the infrared photography pioneer Robert W. Wood, and not after the material wood, which does not strongly reflect infrared.
The other attributes of infrared photographs include very dark skies and penetration of atmospheric haze, caused by reduced Rayleigh scattering and Mie scattering, respectively, compared to visible light. The dark skies, in turn, result in less infrared light in shadows and dark reflections of those skies from water, and clouds will stand out strongly. These wavelengths also penetrate a few millimeters into skin and give a milky look to portraits, although eyes often look black.
Until the early 20th century, infrared photography was not possible because silver halide emulsions are not sensitive to longer wavelengths than that of blue light (and to a lesser extent, green light) without the addition of a dye to act as a color sensitizer. The first infrared photographs (as distinct from spectrographs) to be published appeared in the February 1910 edition of The Century Magazine and in the October 1910 edition of the Royal Photographic Society Journal to illustrate papers by Robert W. Wood, who discovered the unusual effects that now bear his name. The RPS co-ordinated events to celebrate the centenary of this event in 2010. Wood's photographs were taken on experimental film that required very long exposures; thus, most of his work focused on landscapes. A further set of infrared landscapes taken by Wood in Italy in 1911 used plates provided for him by CEK Mees at Wratten & Wainwright. Mees also took a few infrared photographs in Portugal in 1910, which are now in the Kodak archives.
Infrared-sensitive photographic plates were developed in the United States during World War I for spectroscopic analysis, and infrared sensitizing dyes were investigated for improved haze penetration in aerial photography. After 1930, new emulsions from Kodak and other manufacturers became useful to infrared astronomy.
Infrared photography became popular with photography enthusiasts in the 1930s when suitable film was introduced commercially. The Times regularly published landscape and aerial photographs taken by their staff photographers using Ilford infrared film. By 1937 33 kinds of infrared film were available from five manufacturers including Agfa, Kodak and Ilford. Infrared movie film was also available and was used to create day-for-night effects in motion pictures, a notable example being the pseudo-night aerial sequences in the James Cagney/Bette Davis movie The Bride Came COD.
False-color infrared photography became widely practiced with the introduction of Kodak Ektachrome Infrared Aero Film and Ektachrome Infrared EIR. The first version of this, known as Kodacolor Aero-Reversal-Film, was developed by Clark and others at the Kodak for camouflage detection in the 1940s. The film became more widely available in 35mm form in the 1960s but KODAK AEROCHROME III Infrared Film 1443 has been discontinued.
Infrared photography became popular with a number of 1960s recording artists, because of the unusual results; Jimi Hendrix, Donovan, Frank and a slow shutter speed without focus compensation, however wider apertures like f/2.0 can produce sharp photos only if the lens is meticulously refocused to the infrared index mark, and only if this index mark is the correct one for the filter and film in use. However, it should be noted that diffraction effects inside a camera are greater at infrared wavelengths so that stopping down the lens too far may actually reduce sharpness.
Most apochromatic ('APO') lenses do not have an Infrared index mark and do not need to be refocused for the infrared spectrum because they are already optically corrected into the near-infrared spectrum. Catadioptric lenses do not often require this adjustment because their mirror containing elements do not suffer from chromatic aberration and so the overall aberration is comparably less. Catadioptric lenses do, of course, still contain lenses, and these lenses do still have a dispersive property.
Infrared black-and-white films require special development times but development is usually achieved with standard black-and-white film developers and chemicals (like D-76). Kodak HIE film has a polyester film base that is very stable but extremely easy to scratch, therefore special care must be used in the handling of Kodak HIE throughout the development and printing/scanning process to avoid damage to the film. The Kodak HIE film was sensitive to 900 nm.
As of November 2, 2007, "KODAK is preannouncing the discontinuance" of HIE Infrared 35 mm film stating the reasons that, "Demand for these products has been declining significantly in recent years, and it is no longer practical to continue to manufacture given the low volume, the age of the product formulations and the complexity of the processes involved." At the time of this notice, HIE Infrared 135-36 was available at a street price of around $12.00 a roll at US mail order outlets.
Arguably the greatest obstacle to infrared film photography has been the increasing difficulty of obtaining infrared-sensitive film. However, despite the discontinuance of HIE, other newer infrared sensitive emulsions from EFKE, ROLLEI, and ILFORD are still available, but these formulations have differing sensitivity and specifications from the venerable KODAK HIE that has been around for at least two decades. Some of these infrared films are available in 120 and larger formats as well as 35 mm, which adds flexibility to their application. With the discontinuance of Kodak HIE, Efke's IR820 film has become the only IR film on the marketneeds update with good sensitivity beyond 750 nm, the Rollei film does extend beyond 750 nm but IR sensitivity falls off very rapidly.
Color infrared transparency films have three sensitized layers that, because of the way the dyes are coupled to these layers, reproduce infrared as red, red as green, and green as blue. All three layers are sensitive to blue so the film must be used with a yellow filter, since this will block blue light but allow the remaining colors to reach the film. The health of foliage can be determined from the relative strengths of green and infrared light reflected; this shows in color infrared as a shift from red (healthy) towards magenta (unhealthy). Early color infrared films were developed in the older E-4 process, but Kodak later manufactured a color transparency film that could be developed in standard E-6 chemistry, although more accurate results were obtained by developing using the AR-5 process. In general, color infrared does not need to be refocused to the infrared index mark on the lens.
In 2007 Kodak announced that production of the 35 mm version of their color infrared film (Ektachrome Professional Infrared/EIR) would cease as there was insufficient demand. Since 2011, all formats of color infrared film have been discontinued. Specifically, Aerochrome 1443 and SO-734.
There is no currently available digital camera that will produce the same results as Kodak color infrared film although the equivalent images can be produced by taking two exposures, one infrared and the other full-color, and combining in post-production. The color images produced by digital still cameras using infrared-pass filters are not equivalent to those produced on color infrared film. The colors result from varying amounts of infrared passing through the color filters on the photo sites, further amended by the Bayer filtering. While this makes such images unsuitable for the kind of applications for which the film was used, such as remote sensing of plant health, the resulting color tonality has proved popular artistically.
Color digital infrared, as part of full spectrum photography is gaining popularity. The ease of creating a softly colored photo with infrared characteristics has found interest among hobbyists and professionals.
In 2008, Los Angeles photographer, Dean Bennici started cutting and hand rolling Aerochrome color Infrared film. All Aerochrome medium and large format which exists today came directly from his lab. The trend in infrared photography continues to gain momentum with the success of photographer Richard Mosse and multiple users all around the world.
Digital camera sensors are inherently sensitive to infrared light, which would interfere with the normal photography by confusing the autofocus calculations or softening the image (because infrared light is focused differently from visible light), or oversaturating the red channel. Also, some clothing is transparent in the infrared, leading to unintended (at least to the manufacturer) uses of video cameras. Thus, to improve image quality and protect privacy, many digital cameras employ infrared blockers. Depending on the subject matter, infrared photography may not be practical with these cameras because the exposure times become overly long, often in the range of 30 seconds, creating noise and motion blur in the final image. However, for some subject matter the long exposure does not matter or the motion blur effects actually add to the image. Some lenses will also show a 'hot spot' in the centre of the image as their coatings are optimised for visible light and not for IR.
An alternative method of DSLR infrared photography is to remove the infrared blocker in front of the sensor and replace it with a filter that removes visible light. This filter is behind the mirror, so the camera can be used normally - handheld, normal shutter speeds, normal composition through the viewfinder, and focus, all work like a normal camera. Metering works but is not always accurate because of the difference between visible and infrared refraction. When the IR blocker is removed, many lenses which did display a hotspot cease to do so, and become perfectly usable for infrared photography. Additionally, because the red, green and blue micro-filters remain and have transmissions not only in their respective color but also in the infrared, enhanced infrared color may be recorded.
Since the Bayer filters in most digital cameras absorb a significant fraction of the infrared light, these cameras are sometimes not very sensitive as infrared cameras and can sometimes produce false colors in the images. An alternative approach is to use a Foveon X3 sensor, which does not have absorptive filters on it; the Sigma SD10 DSLR has a removable IR blocking filter and dust protector, which can be simply omitted or replaced by a deep red or complete visible light blocking filter. The Sigma SD14 has an IR/UV blocking filter that can be removed/installed without tools. The result is a very sensitive digital IR camera.
While it is common to use a filter that blocks almost all visible light, the wavelength sensitivity of a digital camera without internal infrared blocking is such that a variety of artistic results can be obtained with more conventional filtration. For example, a very dark neutral density filter can be used (such as the Hoya ND400) which passes a very small amount of visible light compared to the near-infrared it allows through. Wider filtration permits an SLR viewfinder to be used and also passes more varied color information to the sensor without necessarily reducing the Wood effect. Wider filtration is however likely to reduce other infrared artefacts such as haze penetration and darkened skies. This technique mirrors the methods used by infrared film photographers where black-and-white infrared film was often used with a deep red filter rather than a visually opaque one.
Another common technique with near-infrared filters is to swap blue and red channels in software (e.g. photoshop) which retains much of the characteristic 'white foliage' while rendering skies a glorious blue.
Several Sony cameras had the so-called Night Shot facility, which physically moves the blocking filter away from the light path, which makes the cameras very sensitive to infrared light. Soon after its development, this facility was 'restricted' by Sony to make it difficult for people to take photos that saw through clothing. To do this the iris is opened fully and exposure duration is limited to long times of more than 1/30 second or so. It is possible to shoot infrared but neutral density filters must be used to reduce the camera's sensitivity and the long exposure times mean that care must be taken to avoid camera-shake artifacts.
Fuji have produced digital cameras for use in forensic criminology and medicine which have no infrared blocking filter. The first camera, designated the S3 PRO UVIR, also had extended ultraviolet sensitivity (digital sensors are usually less sensitive to UV than to IR). Optimum UV sensitivity requires special lenses, but ordinary lenses usually work well for IR. In 2007, FujiFilm introduced a new version of this camera, based on the Nikon D200/ FujiFilm S5 called the IS Pro, also able to take Nikon lenses. Fuji had earlier introduced a non-SLR infrared camera, the IS-1, a modified version of the FujiFilm FinePix S9100. Unlike the S3 PRO UVIR, the IS-1 does not offer UV sensitivity. FujiFilm restricts the sale of these cameras to professional users with their EULA specifically prohibiting "unethical photographic conduct".
Phase One digital camera backs can be ordered in an infrared modified form.
Remote sensing and thermographic cameras are sensitive to longer wavelengths of infrared (see Infrared spectrum#Commonly used sub-division scheme). They may be multispectral and use a variety of technologies which may not resemble common camera or filter designs. Cameras sensitive to longer infrared wavelengths including those used in infrared astronomy often require cooling to reduce thermally induced dark currents in the sensor (see Dark current (physics)). Lower cost uncooled thermographic digital cameras operate in the Long Wave infrared band (see Thermographic camera#Uncooled infrared detectors). These cameras are generally used for building inspection or preventative maintenance but can be used for artistic pursuits as well.