View allAll Photos Tagged diffusion
A collection of eBooks, publications, notebooks and StoryCubes from the Perception Peterborough project.
Kawennio:io School Garden Project (Workbook), Rijeka Work Book - Public Spaces Workshop & Icons of Rijeka by Andrew Hunter, Lisa Hirmer &Lea Perinic (Dodolab)
[#Beginning of Shooting Data Section]
Nikon D2Xs
2007/10/02 10:52:24.5
RAW (12-bit)
Image Size: Large (4288 x 2848)
Color
Lens: 24-85 mm F/2.8-4 D
Focal Length: 26 mm
Exposure Mode: Manual
Metering Mode: Multi-Pattern
1/250 s - F/14
Exposure Comp.: 0 EV
Sensitivity: ISO 100
Optimize Image:
White Balance: Flash
Focus Mode: AF-S
VR Control: OFF
Long Exposure NR: OFF
High ISO NR: Off
Color Mode: Mode I (Adobe RGB)
Tone Comp.: Normal
Hue Adjustment: 0
A few quick shots showing experimental add on tent style diffuser that attaches on to filter ring.
2 layers with a gap in middle,
not finished to working well.
See next ladybird image
Or the art of math :) I implemented this effect for fun for applied maths lessons I gave last month. In rigorous terms, this image has been processed by letting it evolve under a particular partial differential equation. The trick is to endow the image with a Riemannian metric induced from a trivial embedding in 3D euclidean space. Then I updated the metric by tweaking the eigenvalues of the associated quadratic form so as to dilate it along the directions of regular flow like structures. The partial differential equation is just the gradient descent along the Laplace-Beltrami operator, something like the equation that would govern heat diffusion in a very "funky" geometry. Now intuitively: the operation smoothes the image but as if you'd force gaussian filtering to occur along the local main orientations of textures. See large ! The effect on reproduction of impressionist paintings is quite amazing: it really enhances brushtrokes, but regularizes them at the same time. Unfortunately I can't post such pics here.