Forgotten in its old age

by Aditya

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1,112 reputation
411
bio website vyznev.net
location Helsinki, Finland
age
visits member for 3 years
seen yesterday

I'm a PhD student in biomathematics, working on stochastic individual-based models of evolution in spatially structured populations. My other interests include cryptography, programming games and puzzles, photography and graphic design.

I started programming (in AmigaBASIC) when I was 10 years old. Nowadays, I'm most comfortable using Perl, C and JavaScript. I know Java and PHP too, but I can't really say I like them. I also know some Python, but not as much as I'd like.


CC-Zero Please consider any (original) code I post to Stack Overflow and other Stack Exchange sites to be released under CC-Zero unless stated otherwise. You may do whatever you want with it and don't have to credit me in any way, although of course that would be nice.


I'm the main author and maintainer of the Stack Overflow Unofficial Patch (SOUP), a user script for browsers with GreaseMonkey-compatible user script support (Firefox, Chrome, Opera, possibly Safari) that fixes or works around a number of outstanding issues with the Stack Exchange user interface.

I tend to answer a lot more questions than I ask. Some answers I'm rather proud of:


Jul
29
awarded  Yearling
Jul
23
comment How to remove texture from old scanned photos?
While some of the answers (like this one) to the other question might indeed be applicable here too, I don't believe this is really a duplicate. The type of texture in this image is different, and, in particular, the FFT method suggested in the accepted answer to the other question is likely to be useless here.
Jul
21
revised How to photograph sparkly objects?
added 1088 characters in body
Jul
21
answered How to photograph sparkly objects?
Jun
19
comment How do I create a nighttime B&W image but have the subject illuminated by light in full color?
@JaredCravens: What I'd do is open both images as layers in Photoshop / GIMP, align them carefully with the no-spotlight image on top, set the top layer's blending more to Subtract and merge them. This should give a layer showing only the parts of the image illuminated by the spotlight. This layer can then be placed on top of a grayscale copy of the no-spotlight layer, with the blending mode set to Addition / Linear Dodge, to restore the spotlight with colors intact.
Jun
19
revised Long exposure photoshop?
add transparent PNGs
Jun
18
comment Long exposure photoshop?
@WarrenYoung: I just removed the solid black layer that I had added between the edited layer and the original. The actual blurred layer is semitransparent; I'm just using a black background because JPEG doesn't do transparency (and it'd look awful here on the light page background anyway). I suppose I could upload it as a transparent PNG, but it'd be huge at full size.
Jun
18
answered Long exposure photoshop?
Jun
18
awarded  Citizen Patrol
Jun
18
comment What is the best way to remove texture from a scanned textured photo paper? details
I think I know what caused the error you got, and I've posted an explanation below (and edited the original answer to hopefully eliminate this potential for confusion). However, now that the problem has been solved and the original answer clarified, I feel that this question should be closed (and eventually deleted), as it's essentially just extended commentary on the earlier answer.
Jun
18
awarded  Excavator
Jun
18
revised What is the best way to remove texture from a scanned textured photo paper?
add clarifying note per http://photo.stackexchange.com/questions/52134/what-is-the-best-way-to-remove-texture-from-a-scanned-textured-photo-paper-deta/52138#52138
Jun
18
comment What is the best way to remove texture from a scanned textured photo paper?
It's probably a good idea to also black out the other regularly spaced dots in the FFT that are clearly extensions of the central pattern (and correspond to its higher harmonics).
Jun
18
revised What is the best way to remove texture from a scanned textured photo paper? details
more links
Jun
18
suggested suggested edit on What is the best way to remove texture from a scanned textured photo paper?
Jun
18
answered What is the best way to remove texture from a scanned textured photo paper? details
Jun
18
awarded  Scholar
Jun
18
comment What is the cause of this non-uniform bokeh effect?
Accepted. This seems to be the correct answer (and very nicely explained, too). Searching for "cat's eye bokeh" turns up plenty of similar examples, and the geometric explanation makes sense to me. (I had naively assumed that the optical path would only be clipped by the iris diaphragm, but of course that's not necessarily true at wide aperture settings.) While sagittal astigmatism / field curvature might produce a similar effect, I'm pretty sure (based on the other images I saw) that the lens in question does not exhibit those aberrations to such a noticeable degree.
Jun
18
accepted What is the cause of this non-uniform bokeh effect?
Jun
18
awarded  Commentator