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New project: camera color profile calculation

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Re: New project: camera color profile calculation
« Reply #380 on: 09 / January / 2009, 05:54:22 »
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I didn't realize chdk had a built-in option for dng output........    :-[
Huh WHere?

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Offline whim

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Re: New project: camera color profile calculation
« Reply #381 on: 09 / January / 2009, 06:11:21 »
@Coeluh

Main Menu -> Raw Parameters -> DNG Format

wim

Re: New project: camera color profile calculation
« Reply #382 on: 09 / January / 2009, 06:56:09 »
@Coeluh

Main Menu -> Raw Parameters -> DNG Format

wim
I had to create a badpixel.bin. But it says i've like 8211 bad pixels. Is that a huge amount? And I see that i'm getting more noise than ever. Is the badpixel removal thing a good thing?
« Last Edit: 09 / January / 2009, 07:10:00 by Coeluh »

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Offline whim

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Re: New project: camera color profile calculation
« Reply #383 on: 09 / January / 2009, 07:40:06 »
@Coeluh

You should be able to learn more here Save RAW files in DNG format instead of RAW

wim


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Offline zosX

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Re: New project: camera color profile calculation
« Reply #384 on: 07 / March / 2009, 23:39:27 »
0.647821 -0.158121 -0.110623 -0.119231 0.561393 0.042379 0.006041 0.079001 0.193900

Could people using the powershot 590IS try out the above matrix and let me know if it is any better?

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Offline zosX

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Re: New project: camera color profile calculation
« Reply #385 on: 08 / March / 2009, 11:42:17 »
8k in bad pixels isn't all that great but I get the same results. 8k is still a small percentage. The powershot cameras are great but the CCDs seem pretty noisy. I've learned to accept it as a part of a unique package. On low isos shots look great, but 400 is awfully noisy. I used to have a Minolta DiMage z3 that shot totally noise free shots at 400, but then again it was also a $400 camera in its day and it only had 3.2 megapixels. Still wish I had that camera....

Anyways, the noise you see in RAW is there because the jpegs your camera produces have the noise removed via the firmware. I don't know what else you mean. The raws should have more noise but should also be much cleaner. You can use photoshop or lightroom to help remove the noise. A lot of people like raw therapee too. You definitely want to remove the bad pixels. Even in normal daylight they will show up as too dark or whatnot.

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #386 on: 08 / March / 2009, 12:17:26 »
0.647821 -0.158121 -0.110623 -0.119231 0.561393 0.042379 0.006041 0.079001 0.193900
Please upload any original jpeg and jpeg from RAW file with this matrix. It it will good enough, I replace with it old one in dng4ps2 software.

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Offline zosX

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Re: New project: camera color profile calculation
« Reply #387 on: 08 / March / 2009, 20:35:29 »
Doh! Deleted my test shots off the card this morning without thinking.....

Well I can process the test shots the person above posted with the new matrix in dng4ps2, and in doing so I get the same result. Good colors. Let me know what you think.

http://drop.io/zosxavius


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Offline zosX

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Re: New project: camera color profile calculation
« Reply #388 on: 09 / March / 2009, 00:05:30 »
Ok. I played with the matrix and did some more calibration and found it to be more off than I thought! Sorry about that. I got 18 zones to register in another test shot and the green was still askew. Part of the problem is the high noise present even at iso 80. I think I might try this experiment with some of the calibration charts we have at work. Anyways, I decided to select part of the border out of desperation and somehow that bit of grey locked everything back in a bit. It says that the errors are over 10%, but this is the best matrix I've made I think, and may be the best case scenario for raw on this camera. It took quite a few tries to get an image clean enough to use, so good luck!

RESULTS
White area: 5
Errors:
Zone 1: 11.3%
Zone 2: 10.8%
Zone 3: 3.5%
Zone 4: 10.3%
Zone 5: 5.0%
Zone 6: 4.3%
Zone 7: 10.9%
Zone 8: 4.9%
Zone 9: 11.3%
Zone 10: 5.8%
Zone 11: 9.9%
Zone 12: 3.1%
Zone 13: 6.0%
Zone 14: 10.7%
Zone 15: 5.3%
Zone 16: 3.8%
Zone 17: 2.5%
Zone 18: 11.1%
### Max error is greater then 10%, RESULTS ARE POOR ###
Camera -> XYZ matrix:
1.544775 0.166163 0.829944
0.415535 1.613210 -0.222937
-0.165697 -0.625509 4.349774
XYZ -> Camera matrix:
0.665385 -0.120150 -0.133114
-0.171293 0.663381 0.066683
0.000714 0.090819 0.234415

See the file test2.rar on the website I mentioned a post back.

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Offline zosX

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Re: New project: camera color profile calculation
« Reply #389 on: 09 / March / 2009, 00:54:40 »
Oh what is the layout of the matrix btw? I am trying to figure out where the skew is going.... :)

 

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