New project: camera color profile calculation

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Offline ArtDen

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New project: camera color profile calculation
« on: 26 / January / 2008, 14:00:19 »
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Dng4ps2 software v0.2.2 and later contains module for camera color matrix calculation. This module compares RAW and Jpeg file and calculates color matrix.

If there is no color profile for your camera or your camera model is not supported by dng4ps2 yet, just take picture of image (which attached to message) from your PC display, compress RAW and Jpeg file and upload it to zSHARE - Free Image, Video, Audio, Flash and File Hosting or any other servers.

Important! Before taking picture you have:
(with PC)
1. Save my image as file into your disk and open it with full screen mode

(with camera)
2. Select "Program" mode
3. Set best jpeg quality
4. Set white balance to "day light"
5. Switch off all effects
5. Set exposure compensation to -2/3
6. Set focus to infinity
7. Set zoom to middle
8. Set flash to off
9. Set ISO to lowest value
10. And don't take a picture in dark room. Such photos give poor results because of big contrast!

Also I need simple photos taken in RAW (and pair Jpeg too) to test my results.


First results:
To test results, download dng4ps2-0.2.3 and copy values of matrix into 'matrix' option of your camera.  All new color profiles are included in last beta version of dng4ps2: http://dng4ps2.googlecode.com

You can inform me if my results are incorrect. I will try to recalculate it again.

Values of matrices are shown in 'dcraw' order.

A720 IS:
0.640019 -0.220031 -0.096241 -0.077419 0.639766 0.044009 0.017965 0.078396 0.231868

A570 IS
0.528283 -0.144259 -0.085966 -0.202789 0.736563 0.073008 -0.027130 0.107702 0.264543

A620
0.725988 -0.258855 -0.094474 -0.210132 0.656998 0.055163 -0.032444 0.101943 0.237676

A710
0.664401 -0.206085 -0.105935 -0.208489 0.655900 0.051953 -0.051591 0.115760 0.234946

Ixus 950 - used from dcraw

A650 IS
0.913762 -0.261578 -0.135582 -0.099049 1.067089 0.061442 0.048717 0.096802 0.412056

IXUS 70
0.652674 -0.172074 -0.107575 -0.139063 0.594517 0.060252 -0.009088 0.082013 0.238048

G7
0.575419 -0.185557 -0.077898 -0.213702 0.733569 0.081514 -0.024604 0.131906 0.280378

A610
0.765330 -0.268385 -0.110189 -0.165836 0.649552 0.053981 -0.006185 0.066739 0.292068

SD700 IS
0.796464 -0.214669 -0.122599 -0.182793 0.736859 0.075607 0.020593 0.080194 0.277992

A630
0.656080 -0.226478 -0.085884 -0.194636 0.687905 0.037862 0.022873 0.075523 0.265822

A460
0.649324 -0.233893 -0.088521 -0.158955 0.593407 0.069775 -0.044551 0.136891 0.254362

SD800 IS
0.661014 -0.189364 -0.115797 -0.168772 0.661827 0.047392 -0.035846 0.107148 0.233705

A530
0.725264 -0.240542 -0.122310 -0.210248 0.656077 0.052390 -0.011282 0.070400 0.300712

A540
0.687147 -0.201964 -0.125024 -0.148403 0.566810 0.045401 -0.009472 0.063186 0.208602

S5
0.650591 -0.199585 -0.123118 -0.069617 0.583926 0.034354 -0.019113 0.082163 0.210786

S2 - test matrix
0.547708 -0.143462 -0.099243 -0.186838 0.663925 0.050970 -0.005810 0.079162 0.266988

TX1
0.510370 -0.068998 -0.086859 -0.279980 0.766686 0.067944 -0.014382 0.113688 0.239853

SD600
0.767398 -0.227658 -0.144213 -0.217466 0.669319 0.038180 -0.023152 0.077743 0.238669

IXUS 750
0.580280 -0.172239 -0.089707 -0.206596 0.634926 0.063877 0.010377 0.062053 0.242646

IXUS 65
0.783384 -0.227078 -0.127919 -0.181247 0.661743 0.058868 0.025727 0.043891 0.247655

A450
0.652279 -0.199279 -0.101833 -0.159819 0.619308 0.078172 -0.058827 0.150963 0.264216
« Last Edit: 05 / August / 2009, 11:20:37 by ArtDen »

Re: New project: camera color profile calculation
« Reply #1 on: 26 / January / 2008, 14:29:58 »
Deleted
« Last Edit: 22 / April / 2008, 10:10:44 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #2 on: 26 / January / 2008, 14:40:08 »
Good intentions, but there's a major flaw in the thinking. You are presuming that everyone's monitor is calibrated properly. This is rarely if ever the case.
Gamma value and monitor calibration no matter because the program calculates color matrix by comparing RAW and Jpeg image, it doesn't use only RAW.

Re: New project: camera color profile calculation
« Reply #3 on: 26 / January / 2008, 14:42:59 »
Deleted
« Last Edit: 22 / April / 2008, 10:11:04 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye


Uploaded JPEG/CRW for A620
« Reply #4 on: 26 / January / 2008, 16:41:41 »
I assume the program is not yet available for download. Not sure what profiles you have been able to generate already, but I will contribute files from my camera (A620) to help out with your project.

You didn't specify the ISO setting required, so I shot the image at ISO50. I imagine you probably want people to shoot without the flash, so I did that and just had to hold the camera very steady for the 1/4 sec shutter speed.

JPEG and CRW file are being uploaded to: http://www.eliavecellio.com/temp/CanonA620/

Good luck with the project. I look forward to seeing it in action,
Elia

Re: New project: camera color profile calculation
« Reply #5 on: 26 / January / 2008, 23:22:48 »
720IS

If I need to take it again please say, I'll be happy to make any adjustments you want.


Re: New project: camera color profile calculation
« Reply #6 on: 27 / January / 2008, 01:20:34 »
Deleted
« Last Edit: 22 / April / 2008, 10:11:27 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #7 on: 27 / January / 2008, 01:21:10 »
If I need to take it again please say, I'll be happy to make any adjustments you want.
You forgot to set focus to infinity, but I i got first results for 720IS camera

Code: [Select]
1,307006 -0,490421 -0,194771
-0,271197 1,444538 0,037449
-0,119053 0,286961 0,455555
It produces little brighter images then Jpeg but seems colors are correct.

Just tested this matrix for real 720 IS photos. Looks excellent for my taste ;) Anyway I'm waiting corrected images from you
« Last Edit: 27 / January / 2008, 03:52:44 by ArtDen »


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Offline ArtDen

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Re: Uploaded JPEG/CRW for A620
« Reply #8 on: 27 / January / 2008, 01:33:47 »
I assume the program is not yet available for download. Not sure what profiles you have been able to generate already, but I will contribute files from my camera (A620) to help out with your project.
A620 is my camera so I already test program on it :)
My matrix for A620 is
Code: [Select]
1,431362 -0,529117 -0,186946
-0,584117 1,493618 0,119876
-0,169126 0,311496 0,514507

You didn't specify the ISO setting required, so I shot the image at ISO50. I imagine you probably want people to shoot without the flash, so I did that and just had to hold the camera very steady for the 1/4 sec shutter speed.
Thank for remarks. I corrected my first post
« Last Edit: 27 / January / 2008, 02:29:31 by ArtDen »

Re: New project: camera color profile calculation
« Reply #9 on: 27 / January / 2008, 01:42:35 »
Deleted
« Last Edit: 22 / April / 2008, 10:11:49 by Barney Fife »
[acseven/admin commented out: please refrain from more direct offensive language to any user. FW complaints to me] I felt it imperative to withdraw my TOTAL participation. Nobody has my permission, nor the right, to reinstate MY posts. Make-do with my quoted text in others' replies only. Bye

 

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