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Author Topic: New Lens Correction Software  (Read 27468 times)

minnend

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New Lens Correction Software
« Reply #60 on: January 10, 2010, 03:00:33 AM »

regarding jjlphoto's remark, here's some more info one potential gamma/interpolation-related problem: http://www.all-in-one.ee/~dersch/gamma/gamma.html

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Jonathan Wienke

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New Lens Correction Software
« Reply #61 on: January 10, 2010, 08:35:47 PM »

Quote from: minnend
regarding jjlphoto's remark, here's some more info one potential gamma/interpolation-related problem: http://www.all-in-one.ee/~dersch/gamma/gamma.html

The side effects of the "cure" (interpolating in linear) are much worse than the "disease". Converting to linear gamma doesn't fix the stripe between the green and magenta areas, and with the algorithms I'm using, ringing artifacts become a big problem in dark areas, and a black pixel on a white background upsizes much differently than a white pixel on a black background:

[attachment=19349:int_linear.jpg]

Doing the distortion correction in a non-linear gamma works far better than in linear.
« Last Edit: January 10, 2010, 08:36:51 PM by Jonathan Wienke »
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Jonathan Wienke

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New Lens Correction Software
« Reply #62 on: April 21, 2010, 08:05:16 AM »

OK, it's been a long time since the last update. I've got the PSF generation and blur correction code working now, but it still needs a lot of fine-tuning before it will be ready for public consumption. Stay tuned...

Guldsmed

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Re: New Lens Correction Software
« Reply #63 on: December 04, 2012, 06:28:47 AM »

Is there any news about your project? Still alive?
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francois

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Re: New Lens Correction Software
« Reply #64 on: December 04, 2012, 07:18:11 AM »

Is there any news about your project? Still alive?

Jonathan hasn't been showing any activity here for more than one year…
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Francois

Guldsmed

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Re: New Lens Correction Software
« Reply #65 on: December 04, 2012, 08:00:49 AM »

Oh... I C - thx for the info. Not much chance for a completed project then, I guess...
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francois

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Re: New Lens Correction Software
« Reply #66 on: December 04, 2012, 08:40:25 AM »

Oh... I C - thx for the info. Not much chance for a completed project then, I guess...

You might try to PM Jonathan and see whether he's still alive or not! I wouldn't be too optimistic, though.
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Francois

jeremypayne

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Re: New Lens Correction Software
« Reply #67 on: December 07, 2012, 02:50:22 PM »

You might try to PM Jonathan and see whether he's still alive or not! I wouldn't be too optimistic, though.

 I think he may be back in the employ of the government once again ...
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