View allAll Photos Tagged Retinal
Lisboa
Newborns visual perception:
"Infants' eyes develop significantly after birth. The muscles of the eye such as ciliary muscles – become stronger after two months of age, allowing infants to focus on particular objects through contraction and relaxation. Their retinal images are also smaller compared to adults due to shorter distances from the retina to the cornea of the infants' eye"
Source: Wikipedia
for a couple of years, in my examination lanes in the office, i ran a screen saver which featured photographs of retinal disorders. after a while, patients began to ask me if i had other photographs which i could substitute for the retina photos, so i began to display my personal photos from the yard. it wasn't long afterwards that someone suggested i post my photos on flickr. the rest, as they say, is history. the spider web photo had not been one of my favorites, but after so many people said " i really like that spider web picture", i decided to post it on flickr as well. best viewed large.
our two „optics“ produce two inverted pictures of our surrounding and our „sensor“
creates a parabolic photo of the seen … vaguely, as seen on this photo, here …
Räumliches Sehen - ein dreidimensionaler Sehraum entsteht indem Erscheinungen in Entfernung, Lage, Größe sowie in ihrer Plastizität wahrgenommen werden, aufgrund unserer psychophysiologischen Seherfahrung.
Es stellt sich die Frage, ob das Fehlen der Möglichkeit einer exakten, perspektivischen Darstellung in der Antike und im Mittelalter (im Gegensatz zur Renaissance), also die Historizität der Perspektive, die Vermutung einer anderen Raumwahrnehmung zu anderen Zeiten zulässt.
Es geht um zweierlei Modalitäten eines Prozesses. Erstens die Entstehung der perspektivischen Anschauung als im Grunde psychophysiologisches Phänomen, und zweitens die kontinuierliche Vervollkommnung der Perspektivität der Anschauung im Modus geometrisch-optischer Intensivierung (der perspektivischen Innenstruktur des Sehraumes) in der Geschichte.
In der rein geometrischen Optik gleicht das Auge funktional einer Kamera.
Strukturell aber unterscheidet sich das Auge von einer Kamera in der sphäroidischen Form der Retina.
Sicherlich war die Raumanschauung - demgemäß die Seherfahrung - der Antike im Vergleich zur Renaissance anders, ebenso wie die des 20. Jahrhunderts im Vergleich zu der der Renaissance.
Man kann jedoch nicht davon ausgehen, dass diese physiologische Struktur des Auges sich mit der Zeit ändert.
Die Kugelform der Netzhaut ist eine Grenzform - ein Grenzmodus der Krümmung.
Die psychophysiologische Optik ist im Vergleich zur geometrischen keineswegs ein autonomous
System; sie verbindet die reine Optik, die eine geometrische Optik ist und in der das Auge
auch in seiner Abgetrenntheit vom Leib einer Kamera gleicht, mit der rein physiologischen
Bearbeitung des Gesehenen in unserem Gehirn.
Die visuelle Wahrnehmung entsteht aus der Zusammenwirkung dieser verschiedenen Modalitäten der Optik, die, wenn man im einzelnen betrachtet, verschiedene Funktionen haben - von der bloßen Aufnahme zweidimensionaler Netzhautbilder von der Außenwelt zur Entwicklung einer dreidimensionalen Raumanschauung bis zur Speicherung und Aufbewahrung der visuellen Wahrnehmung im Gedächtnis und deren Wiedererzeugung als Erinnerungs-, Traum- oder Phantasiebilder.
Das „wirkliche“ Sehen kann nur aus einer Einheit von diesen verschiedenen Funktionen zustande kommen, in der die bloße Aufnahme innerhalb der rein geometrischen Optik stets durch eine psychophysiologische Operation bearbeitet wird.
Die psychophysiologisch operative Funktion des Auges (in Verbindung mit dem zerebralen System) ist deshalb die Quelle der Raumanschauung.
Actually this somehow fits this week's PPT theme (pink belly). Doesn't it?! At least you can see my belly... I know I could lose some pounds... but I don't want to :P
Happy Pretty Pink Tuesday anyway!
------------------
Update: Somehow pretty much everything is still going wrong lately. Now that my mum is slowly recovering I obviously thought it was time to come into the hospital myself *rolleyes* I couldn't see with my right eye yesterday, so I came to hospital, they diagnosed a retinal tear and did an emergency laser operation in the middle of the night to safe my retina. Everything went well, I hope to see with that eye soon again. Sheeeesh! I'm a photographer. My eyes are everything to me! What a shock!!! But I'm doing okay now!!! Sorry to bore you with only bad news lately *sigh* I'm trying hard to have an awesome 2010 from now on ;) *lol* And of course it's a shot from past year, I'm not able to shoot at the moment...
------------------
(-: Please no huge glittering group awards and invitations :-)
All my pictures are copyright protected. Please do not use without my written permission
Most of us on the top level of the CIA knew that The Day would come. There was just nothing we could do to stop it. We launched all of our nukes, they launched all of theirs. We shot down most of them, but when you have hundreds coming, there was no hope. Everything was gone, and we knew that would happen. That was why we set up Operation Phoenix. A way to set up the Reunited States of America under the president who was in deep hiding with most of the Secret Service and his cabinet. From what I had heard over my Rugged radio, there where only nine of us left. I am doing well, I have traveled from Langley to Colorado in just three months, mostly due to the precautions I had taken beforehand. I arrived at our bunker, our supposed HQ that had been set up to be our base for rallying the survivors. I opened the bunker's sealed door with my key card and a retinal scan that required me to take of my gas mask. I put it back on and pulled out my Geiger counter. The area checked out well enough to be breathable. The bunker has been placed where they had expected the least amount of fallout, Rocky Gorge, Colorado. The door slid out and I walked in. The place is huge, with many different rooms and a whole armory, a garage full of gasoline and jeeps, even a tank or two, and warehouse of rations.
The only problem is that no one is here...I expect the worst...
------------------------------------------------------------------------------------------------------------------------------------
THIS IS BEST VIEWED ON LIGHTBOX: www.flickr.com/photos/56829148@N05/8379257436/lightbox/
This was heavily inspired by Sam's bunker scene he did a while back. I have wanted to use my Apoc ranger forever in a scene and this was the best I could come up with.
Gotta' love those LifeLights. They have made life so easy, and bring light to my world. lol
Enjoy and God Bless!
Btw, it feels good to have another scene up. Basketball and school have been detrimental to my building time.
One from 2017 when I did my birds of Prey course. An intense stare from the Strix Aluco.
An owl's eyes are placed at the front of the head and have a field overlap of 50–70%, giving it better binocular vision than diurnal birds of prey (overlap 30–50%). The tawny owl's retina has about 56,000 light-sensitive rod cells per square millimetre (36 million per square inch); although earlier claims that it could see in the infrared part of the spectrum have been dismissed, it is still often said to have eyesight 10 to 100 times better than humans in low-light conditions. However, the experimental basis for this claim is probably inaccurate by at least a factor of 10. The owl's actual visual acuity is only slightly greater than that of humans, and any increased sensitivity is due to optical factors rather than to greater retinal sensitivity; both humans and owl have reached the limit of resolution for the retinas of terrestrial vertebrates.
Adaptations to night vision include the large size of the eye, its tubular shape, large numbers of closely packed retinal rods, and an absence of cone cells, since rod cells have superior light sensitivity. There are few coloured oil drops, which would reduce the light intensity. Unlike diurnal birds of prey, owls normally have only one fovea, and that is poorly developed except in daytime hunters like the short-eared owl.
Original paintings acrylic on canvas, 18x24"
My second monotone interpretation of these paintings ...
( Please View Full Screen ... )
I had a macular hole affecting central vision in my left eye. Through photo editing software, I created an image of the visual distortions (metamorphosia) that I saw. Objects also appeared smaller than actual (micropsia). Peripheral vision was unaffected.
Sharing because I could find no good visualizations of what it is like to have a macular hole. Please feel free to use it for educational/editorial, modeling or machine learning purposes.
© 2013 Bong Manayon | FB: Bong Manayon Photography
Pentax MZ-3 + SMCP FA 28-105/3.2-4.5 AL(IF) + Kentmere 400
________________________________________________
This photo has made it to explore! Rank #195 on 2013-06-9.
✧˖ ° 1 Hundred✧˖ °
Forever 21
Cute Cropped Top & Little Shorts
Fits: LaraX + PetiteX, Legacy + Perky + Perky Petite, Reborn + Waifu
Located @ Mainstore
Taxi:
maps.secondlife.com/secondlife/Leather%20and%20Lace/73/16...
✧˖ ° Khvlifa ✧˖ °
Level Up
Pose Set (3) | Copy & Modify
Located @ The Grand Event
Taxi:
maps.secondlife.com/secondlife/The%20Grand%20Event/241/12...
✧˖ ° Saint ✧˖ °
yae skin veil
Available in Velour Tones.
INCLUDED IN EACH PURCHASE:
Identical Shape & Brows| Skin, Neckblends, & Ears, (Tattoo Layers)| Browless Version
Located @ Mainstore
Taxi:
maps.secondlife.com/secondlife/Willows/56/43/816
✧˖ ° Saint ✧˖ °
cienna retinal
Retinals has been curated for Lel Evo X heads, while extending compatibility with BOM showcasing a palette of 16 shades
Located @ Mainstore
Taxi:
As I sat in the waiting area for my retinal ophthalmology appointment, I wondered if I was crazy for taking up photography. I have diabetic retinopathy, seems odd that a person who will eventually have no eyesight (in my 70's, touch wood) take up a hobby, and hopefully a career, where eyesight is so important.. Am i nuts? I guess I want to capture as much life as I can, before it all goes dark..
A female Black Darter, at 29-34mm our smallest Dragonfly. I've not had much luck this summer. I've had trouble with my left eye for a couple of weeks and had a full test a couple of days ago. They referred me to a specialist and yesterday I had laser surgery, to repair a retinal tear. I still have a large floating body in the eye but at least I didn't loose my sight. The surgeon and staff at James Cook Hospital were superb, as were the people at Specsavers in Whitby. My thanks go to them all.
Details of Retinal flare space, 2018.
Artwork by Olafur Eliasson, an Icelandic–Danish artist known for sculptured and large-scale installation art.
On display at Museum Voorlinden, Wassenaar NL.
not Def Leppard's album. Ah... memories... but I digress.
Intense action to be had as the evening set in. Unlike last year, I had a better lens to work with to keep the ISO low and shoot wide open. Pretty sure I did some retinal damage here as they have some obnoxiously bright headlights.
2018 Petit Le Mans
Thanks for your visit. Comments, faves and invitations that you may leave are very appreciated.
A female rufous net-casting or ogre-faced spider, Deinopis subrufa. This spider is native to eastern Australia including Tasmania. The body is about 2.5 cm (1 inch) long. Another photo below. They are harmless. Lots more information below too.
Net-casting spiders have 8 eyes. Six are small but 2 are enlarged. These large red eyes provide outstanding low-light night vision. Their compound lenses have an F number of 0.58 which means they can concentrate available light more efficiently than a cat (F 0.9) or an owl (F 1.1). The image is focussed onto a large, light-receptive retinal membrane (which is destroyed at dawn and renewed again each night).
Net-casting spiders have a unique prey-catching method. At night, they build a rectangular, postage-stamp-sized web, made with wool-like, entangling silk threads. These little nets are made among low vegetation, usually above a surface across which prey animals are likely to walk (e.g. a broad leaf , a tree trunk or even a house wall). The spider hangs head down from a trapeze of silk, holding the net in its front pairs of legs; and there it waits, its enormous eyes watching for prey movement. When an insect passes over spots on the web, the spider opens the stretchy web to two or three times its resting size and lunges it downward over the unsuspecting prey. The clinging silk net envelopes the insect, which is then rapidly bitten and wrapped. While eating its catch, the spider may start making a new net for its next meal. Prey animals include cockroaches, ants, spiders and even moths - net-casters seem sensitive to air currents and will lunge the net towards aerial prey. Prey as large as male trapdoor spiders and gryllacridid wood crickets are taken. - See more at: australianmuseum.net.au/rufous-net-casting-spider
f/32 1/160 ISO 1000 100mm Pentax f/2.8 Pentax K-5 flash fired.
MacroMondays: Eye.
This is an archive post. I hope its allowed because eyes are amazing. It's the back of my own eye, but it hasn't changed very much as I regulary get my eye photographed when we teach our trainee medical photographers. So Im cheating here because i didn't actually take the photograph and we used specialist equipment - a retinal camera - to take it BUT I did instruct!! Eyes are fascinating to a medical photographer and I love it and I hope that it is allowed and enjoyed.
The extent of what I can see after an hour with the retinal specialist.
It's always a long day after getting refracted. And I still haven't seen the regular optometrist about new glasses yet. I really have to find one that will work on Tuesdays and Wednesdays pretty soon, because I get no sick leave for medical appointments.
A bit of insanity, too. I was considering going to the nursery while dilated, but by the time my appointment was over, it was ninety-six degrees outside. I settled for lox and bagels instead. That much I could handle with dilated eyes and air conditioning.
The pressure in Blue's eyes is now so severe that she needs three different drops, three times a day. She's completely trusting and accepting of this and never puts up a fuss. Tomorrow morning she'll undergo a procedure which targets the fluid making cells in the eyes. A needle is inserted into the eye and delivers an antibiotic which kills these fluid making cells. We're hopeful it will be effective in reducing the fluid build-up in her eyes, therefore alleviating her pain. Still through it all, she remains the most loving and peaceful spirit. Happy to go for walks and be around all the neighborhood people and dogs.
What remains of sunspot AR2758.
Our sun goes through an 11 year solar cycle. It is now in what is known as the Solar Minimum of that cycle. During the Solar Minimum, solar activity is at its lowest. Sunspot and solar flare activity are not completely absent, but diminishes dramatically.
What you see here is what remains of a small sunspot known as Active Region(AR) 2758 that belongs to the next solar cycle.
NEVER, EVER LOOK DIRECTLY AT THE SUN. PERMANENT RETINAL DAMAGE CAN OCCUR IN SECONDS!
Hello Flickr friends!! Just stopping by to say Hello,..I hope that everyone is doing well. Missed you guys and hoping that I can catch up for what I missed on your photostream.
It has been tough for the last two weeks between Tom and myself. Before the end of July, he had an emergency surgery on his right eye caused by retinal detachment. He's doing much better now and we are both thankful that everything went well for him.
I'm still going to be ON/OFF for a while,..still having issues with my arm and shoulder and still can not do to much.
Last but not least, I would like to thank each and everyone for the well wishes on my last upload last month. Very much appreciated.
Thank you for your visit, kind comments and fave. Always greatly appreciated.
Copyright 2018 © Gloria Sanvicente
No Group invitations please! Thank you!!
Happy World Health Day
Celebrated each year on 7 April, World Health Day shines a light on a health topic of concern. This year all eyes, including ESA astronaut Matthias Maurer’s, are on the health of our planet Earth.
From on board the International Space Station 400 km above Earth, Matthias has a unique overview of our planet. Beautiful yet fragile, resilient yet under threat, our third rock from the Sun nevertheless needs looking after.
Matthias work in space during Cosmic Kiss reinforces this. Besides taking numerous photos of Earth from space that compliment data taken by Earth observation satellites, he is also running many experiments exploring human health in space that benefits those on Earth.
One such experiment is the joint ESA and German Aerospace Center’s Retinal Diagnostics project that monitors astronaut eyes while in space.
Developed by young researchers from ESA’s Spaceship EAC initiative, the project uses images of astronauts’ optical discs in space to train an artificially intelligent (AI) model. This model will be used to automatically detect changes in the optic nerve of astronauts, known as Space-Associated Neuro-ocular Syndrome (SANS).
Matthias uses an ophthalmic lens attached to a tablet camera to take images of his retina to send to experts on the ground. The app is so compact and easy to use that it can be used for remote examinations of patients in remote locations on Earth, so that everyone can keep an eye on their retinal health.
Follow Matthias on his Cosmic Kiss mission for more science and space on Twitter, Facebook, Instagram, YouTube the Cosmic Kiss mission page and in regular Space Station updates from ESA.
Credits: NASA/ESA–M. Maurer
The common kingfisher (Alcedo atthis), also known as the Eurasian kingfisher and river kingfisher, is a small kingfisher with seven subspecies recognized within its wide distribution across Eurasia and North Africa. It is resident in much of its range, but migrates from areas where rivers freeze in winter.
This sparrow-sized bird has the typical short-tailed, large-headed kingfisher profile; it has blue upperparts, orange underparts and a long bill. It feeds mainly on fish, caught by diving, and has special visual adaptations to enable it to see prey under water. The glossy white eggs are laid in a nest at the end of a burrow in a riverbank.
This species has the typical short-tailed, dumpy-bodied, large-headed, and long-billed kingfisher shape. The adult male of the western European subspecies, A. a. ispida has green-blue upperparts with pale azure-blue back and rump, a rufous patch by the bill base, and a rufous ear-patch. It has a green-blue neck stripe, white neck blaze and throat, rufous underparts, and a black bill with some red at the base. The legs and feet are bright red. It is about 16 centimetres (6.3 in) long with a wingspan of 25 cm (9.8 in), and weighs 34–46 grams (1.2–1.6 oz). The female is identical in appearance to the male except that her lower mandible is orange-red with a black tip. The juvenile is similar to the adult, but with duller and greener upperparts and paler underparts. Its bill is black, and the legs are also initially black. Feathers are moulted gradually between July and November with the main flight feathers taking 90–100 days to moult and regrow. Some that moult late may suspend their moult during cold winter weather.
The flight of the kingfisher is fast, direct and usually low over water. The short, rounded wings whirr rapidly, and a bird flying away shows an electric-blue "flash" down its back.
In North Africa, Europe and Asia north of the Himalayas, this is the only small blue kingfisher. In south and southeast Asia, it can be confused with six other small blue-and-rufous kingfishers, but the rufous ear patches distinguish it from all but juvenile blue-eared kingfishers; details of the head pattern may be necessary to differentiate the two species where both occur.
The common kingfisher has no song. The flight call is a short, sharp whistle chee repeated two or three times. Anxious birds emit a harsh, shrit-it-it and nestlings call for food with a churring noise.
The common kingfisher is widely distributed over Europe, Asia, and North Africa, mainly south of 60°N. It is a common breeding species over much of its vast Eurasian range, but in North Africa it is mainly a winter visitor, although it is a scarce breeding resident in coastal Morocco and Tunisia. In temperate regions, this kingfisher inhabits clear, slow-flowing streams and rivers, and lakes with well-vegetated banks. It frequents scrubs and bushes with overhanging branches close to shallow open water in which it hunts. In winter it is more coastal, often feeding in estuaries or harbors and along rocky seashores. Tropical populations are found by slow-flowing rivers, in mangrove creeks and in swamps.
Common kingfishers are important members of ecosystems and good indicators of freshwater community health. The highest densities of breeding birds are found in habitats with clear water, which permits optimal prey visibility, and trees or shrubs on the banks. These habitats have also the highest quality of water, so the presence of this bird confirms the standard of the water. Measures to improve water flow can disrupt this habitat, and in particular, the replacement of natural banks by artificial confinement greatly reduces the populations of fish, amphibians and aquatic reptiles, and waterside birds are lost. It can tolerate a certain degree of urbanization, provided the water remains clean.
This species is resident in areas where the climate is mild year-round, but must migrate after breeding from regions with prolonged freezing conditions in winter. Most birds winter within the southern parts of the breeding range, but smaller numbers cross the Mediterranean into Africa or travel over the mountains of Malaysia into Southeast Asia. Kingfishers migrate mainly at night, and some Siberian breeders must travel at least 3,000 km (1,900 mi) between the breeding sites and the wintering areas.
The common kingfisher hunts from a perch 1–2 m (3.3–6.6 ft) above the water, on a branch, post or riverbank, bill pointing down as it searches for prey. It bobs its head when food is detected to gauge the distance and plunges steeply down to seize its prey usually no deeper than 25 cm (9.8 in) below the surface. The wings are opened underwater and the open eyes are protected by the transparent third eyelid. The bird rises beak-first from the surface and flies back to its perch. At the perch the fish is adjusted until it is held near its tail and beaten against the perch several times. Once dead, the fish is positioned lengthways and swallowed head-first. A few times each day, a small greyish pellet of fish bones and other indigestible remains is regurgitated.
The food is mainly fish up to 12.5 cm (4.9 in) long, but the average size is 2.3 cm (0.91 in). In Central Europe, 97% of the diet was found to be composed of fish ranging in size from 2 to 10 cm with an average of 6.5 cm (body mass range from 10 g, average 3 g). Minnows, sticklebacks, small roach and trout are typical prey. About 60% of food items are fish, but this kingfisher also catches aquatic insects such as dragonfly larvae and water beetles, and, in winter, crustaceans including freshwater shrimps. In Central Europe, however, fish represented 99.9% of the diet (data from rivers, streams, and reservoirs from years 1999 to 2013). Common kingfishers have also been observed to catch lamprey. One study found that food provisioning rate increased with brood size, from 1498 g (505 fishes for four nestlings) to 2968 g (894 fishes for eight nestlings). During the fledging period each chick consumed on average 334 g of fish, which resulted in an estimated daily food intake of 37% of the chick's body mass (average over the entire nestling period). The average daily energy intake was 73.5 kJ per chick (i.e., 1837 kJ per 25 days of the fledging period).
A challenge for any diving bird is the change in refraction between air and water. The eyes of many birds have two foveae (the fovea is the area of the retina with the greatest density of light receptors), and a kingfisher can switch from the main central fovea to the auxiliary fovea when it enters water; a retinal streak of high receptor density which connects the two foveae allows the image to swing temporally as the bird drops onto the prey. The egg-shaped lens of the eye points towards the auxiliary fovea, enabling the bird to maintain visual acuity underwater. Because of the positions of the foveae, the kingfisher has monocular vision in air, and binocular vision in water. The underwater vision is not as a sharp as in air, but the ability to judge the distance of moving prey is more important than the sharpness of the image.
Each cone cell of a bird's retina contains an oil droplet that may contain carotenoid pigments. These droplets enhance color vision and reduce glare. Aquatic kingfishers have high numbers of red pigments in their oil droplets; the reason red droplets predominate is not understood, but the droplets may help with the glare or the dispersion of light from particulate matter in the water.
For more information, please visit en.wikipedia.org/wiki/Common_kingfisher
Hi all, I had eye surgery on Tuesday, so I've missed five days of We're Here themes. Thought I'd put them all together for today's image, even though they don't "count" – especially since they weren't taken on the day of the challenge.
The surgery was to remove an epi-retinal membrane. They go into your EYEBALL with forceps and PEEL it off the retina. What's more, you're watching it from inside, like watching a movie. It was incredible to watch -- really fascinating and beautiful, Of course I was a little sedated, so that may account for my incredibly positive impression of the whole thing.
Part of the procedure is they put an air bubble in there to save the space until your body can replace the fluid that's been removed. I can see this bubble, and it's very disorienting.
You know when you're swimming, how if you put your eyes at the surface of the water, you have half normal vision and half underwater vision? That's what it's like. So weird and disorienting walking around. I've mostly been lolling about on the couch, watching baking shows... Anyway, all this will improve over the next six weeks. It's all good.
Thanks to all who played my day -- your eye shots were really fun!!
Eyesight is a particular characteristic of the owl that aids in nocturnal prey capture. Owls are part of a small group of birds that live nocturnally, but do not use echolocation to guide them in flight in low-light situations. Owls are known for their disproportionally large eyes in comparison to their skulls. An apparent consequence of the evolution of an absolutely large eye in a relatively small skull is that the eye of the owl has become tubular in shape. This shape is found in other so-called nocturnal eyes, such as the eyes of strepsirrhine primates and bathypelagic fishes. Since the eyes are fixed into these sclerotic tubes, they are unable to move the eyes in any direction. Instead of moving their eyes, owls swivel their heads to view their surroundings. Owls' heads are capable of swivelling through an angle of roughly 270°, easily enabling them to see behind them without relocating the torso. This ability keeps bodily movement at a minimum, thus reduces the amount of sound the owl makes as it waits for its prey. Owls are regarded as having the most frontally placed eyes among all avian groups, which gives them some of the largest binocular fields of vision. However, owls are farsighted and cannot focus on objects within a few centimetres of their eyes. These mechanisms are only able to function due to the large-sized retinal image. Thus, the primary nocturnal function in the vision of the owl is due to its large posterior nodal distance; retinal image brightness is only maximized to the owl within secondary neural functions. These attributes of the owl cause its nocturnal eyesight to be far superior to that of its average prey.
Thank you Wikipedia!
119 Pictures in 2019 ... #112. Vision
Sony α7 II
Minolta 100-200mm lens
After developing a retinal occlusion I no longer see with my left eye. Who knows how long this will last! But here's my latest monoprint with the aid of my right eye. 8x10 inches.
The iconic Fulcrum roaring into the sky and flying into the sun like Ikarus. I love the heat effect of the exhaust plume of the afterburner turning the air into jelly. Powered by two RR-33A afterburning turbofan engines developing 80 kN each. I did close my right eye, as the magnifying effect of the SLR camera can cause retinal burns if pointed at the sun. The silhouette of the Fulcrum is beautiful, elegant and unmistakable. Evening display during Bucharest International Air Show 2017.
Categories:
Mikoyan - MiG-29 - Polish Air Force - BIAS - BIAS 2017
Collections:
The Brewtopian design for the new World Court bunker. On the surface level is the super-secret entry, with a retinal scanner. If someone fails the retinal scan, they are immediately vaporized by the overhead Illudium Q-36 Space Modulator.
Upon gaining entry, the World Court Ambassador proceeds to the upper transporter room, where he or she is sent through the either to the lower transporter room.
At the lower level is the World Court chamber. On the wall is a world map and at the right hand side of the conference table is a podium where the Chief Magistrate can deliver his speeches (in Penguinese).
Yeah, I just had one of those. Fortunately, emergency surgery was successful and things are getting back to normal. Need to make some photographs again!
The Ravel Residence in Amsterdam is a complex that offers student housing. Its characteristic round windows reflect the surrounding area in the South of Amsterdam and are being reflected themselves in the surrounding waters.
Yup, this was taken over a week ago and I'm still seeing spots. The retinal burn was worth it though, 'cause that was one fine sunset.
These days any type of identification is possible. Forget fingerprints, retinal scans or the color of your eyes, and other markers of identity, security could soon be looking at the shape of your ears when deciding whether you are who you say you are.
Researchers have discovered that each person’s ears have a unique shape and are as distinguishing as your fingerprints; no two ears, even on the same person, are alike. Ears can be scanned and then be compared with a database of ear shapes to identify people. While one might think that these ear scanning systems have just been discovered, they have actually been around for quite some time. In fact, the first patent for the use of the outer ear for identification purposes was granted to Manual Zimberhoff in 1963.
While this process could be used in the future for passport control to identify individuals as they simply walk through immigration, the system is now available to various security groups and law enforcement.
Is George Orwell’s omnipresent government surveillance presented in "1984" one step closer to reality.
Dormer window.
Every morning, while staying in this rented cottage, I’d wake up and look at these patterns of light coming through the blinds onto the ceiling: pretty patterns - tonal gradients and interlocking shapes.
You’ve seen another image of the window before from a previous visit (see flic.kr/p/259EUfK ), but that was a much more romantic shot rather than this geometric minimalism.
So later one day I went back, shut the blinds again, and shot dozens of images - I discovered it’s challenging to compose this sort of shot. You need to find the right viewpoint and create enough space around it.
The thought was that it might make an interesting abstract. And I think that worked out about right. I’ll publish a monochrome version today (along with a gradient-mapped retinal challenger).
I also imagined that if I threw the image at a mirror filter it would produce an interesting result. That didn’t work out. The best I could get was little more than what looked like the tiles in a rather dingy bathroom… Ah well: learning took place.
My next attempt was to build an image by flipping, merging and blending. That eventually yielded something interesting and it’s the one I have posted on the Sliders Sunday group today.
All the colour was generated from the photograph, though at the end the result was a little grainy and had a discordant yellow cast in parts. So I strengthened the colours by steepening the ramps on the A and B channels in LAB mode and then tweaking the B channel (blue-yellow) to get rid of the yellow cast.
The final tweak was to use a Bilateral blur filter. This is an edge-preserving blur filter (which sounds like a contradiction in terms!) and is very useful for getting rid of noise (like the graininess here) or producing painterly effects.
I'll post a link to the in-camera version in the first comment so that you can see how far we came here :)
Thank you for taking the time to look. I hope you enjoy the image! Happy Sliders Sunday :)
[Handheld in muted daylight from window.
Processed in Affinity from the in-camera jpeg.
Duplicated original image layer; flipped horizontal and merged back to first layer with Lighten blend mode at 100% opacity.
Merged result to new layer. Flipped vertically and blend back to the original Difference/100%. This gave us the final symmetric result.
Merged result again to new layer as before and merged this back with the underlying layers ussing Screen/100% to increase contrast.
Merged result to new layer and blended back with Negation/100% increasing contrast in a different way.
Bilateral blur to remove noise and smooth colours.
Curves adjustment in LAB mode to strengthen colours and remove yellow cast in some areas (see text).]
Photographed in Kenya, Africa from a safari vehicle
=>Please click twice on the image to view at the largest size<=
This may be my favorite photo from a trip my wife and I took in 2023 with my son, his wife and their two young-adult sons. I love photographing Dik-diks on game drives anyway, and to have the opportunity to photograph one in the company of three large giraffes was extra special.
Thank you for your visit and comments!
======================
From Wikipedia: The giraffe is a large African hoofed mammal belonging to the genus Giraffa. It is the tallest living terrestrial animal and the largest ruminant on Earth. Traditionally, giraffes were thought to be one species, Giraffa camelopardalis, with nine subspecies. Most recently, researchers proposed dividing them into up to eight extant species due to new research into their mitochondrial and nuclear DNA, as well as morphological measurements. Seven other extinct species of Giraffa are known from the fossil record.
The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones, and its spotted coat patterns. It is classified under the family Giraffidae, along with its closest extant relative, the okapi. Its scattered range extends from Chad in the north to South Africa in the south, and from Niger in the west to Somalia in the east. Giraffes usually inhabit savannahs and woodlands. Their food source is leaves, fruits, and flowers of woody plants, primarily acacia species, which they browse at heights most other herbivores cannot reach.
Lions, leopards, spotted hyenas, and African wild dogs may prey upon giraffes. Giraffes live in herds of related females and their offspring or bachelor herds of unrelated adult males, but are gregarious and may gather in large aggregations. Males establish social hierarchies through "necking", combat bouts where the neck is used as a weapon. Dominant males gain mating access to females, which bear sole responsibility for rearing the young.
Head
Both sexes have prominent horn-like structures called ossicones, which can reach 13.5 cm (5.3 in). They are formed from ossified cartilage, covered in skin and fused to the skull at the parietal bones. Being vascularised, the ossicones may have a role in thermoregulation, and are used in combat between males. Appearance is a reliable guide to the sex or age of a giraffe: the ossicones of females and young are thin and display tufts of hair on top, whereas those of adult males tend to be bald and knobbed on top. A lump, which is more prominent in males, emerges in the middle of the skull. Males develop calcium deposits that form bumps on their skulls as they age. Multiple sinuses lighten a giraffe's skull. However, as males age, their skulls become heavier and more club-like, helping them become more dominant in combat. The occipital condyles at the bottom of the skull allow the animal to tip its head over 90 degrees and grab food on the branches directly above them with the tongue.
With eyes located on the sides of the head, the giraffe has a broad visual field from its great height. Compared to other ungulates, giraffe vision is more binocular and the eyes are larger with a greater retinal surface area. Giraffes may see in colour and their senses of hearing and smell are sharp. The ears are movable and the nostrils are slit-shaped, possibly to withstand blowing sand. The giraffe's tongue is about 45 cm (18 in) long. It is black, perhaps to protect against sunburn, and can grasp foliage and delicately pick off leaves. The upper lip is flexible and hairy to protect against sharp prickles.
Afr-0I7A2654fFlkrDWi2
Week 36 in 52 Weeks for Dogs. The news wasn't good for Tasku when we visited the vet last Tuesday. We have a probable diagnosis of SARDS (Sudden Acquired Retinal Degeneration Syndrome). We still have get confirmation with a visit to a specialist, which unfortunately isn't until the 16th, but it does seem likely that it will be the correct diagnosis. Sadly, as far as I'm aware, there is no treatment and the condition is irreversible.
I am feeling very sad for Tasku, as now her world is dark and silent. Since her sight went, we have realised just how deaf she is. She doesn't even hear a high pitched dog whistle.
Explore 361