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New project: camera color profile calculation

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #260 on: 15 / July / 2008, 11:08:48 »
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xbc ISO was "Auto" when you did your photo (I see it from Jpeg exif data) and your camera used ~350 for ISO when i did your shot (I see it from maker notes of Jpeg)
About focus: just select manual socus and set it to infinity

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Offline xbc

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Re: New project: camera color profile calculation
« Reply #261 on: 15 / July / 2008, 11:45:40 »
I had the wrong iso setting, becuase I had moved the setting in the chdk. It should be Iso 80 Now. I also turned on the Infinity setting, and made sure it said inf in the DOF while shooting. Here are the new files for an SD600. (Which is the same model of a IXUS 60 or an IXY 70)

sd600-crw-jpg.rar

Hope this is a correct picture, thanks

Acoording to wikipedia it should have the same sensor as a SD700 IS
« Last Edit: 15 / July / 2008, 11:48:31 by xbc »

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Offline xbc

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Re: New project: camera color profile calculation
« Reply #262 on: 15 / July / 2008, 12:37:51 »
After playing a while with the new beta, I figured how to add my camera. This were my results

RESULTS
White area: 11
Errors:
Zone 1: 8.0%
Zone 2: 8.8%
Zone 3: 3.1%
Zone 4: 8.6%
Zone 5: 5.7%
Zone 6: 2.2%
Zone 7: 9.4%
Zone 8: 6.1%
Zone 9: 4.9%
Zone 10: 9.7%
Zone 11: 3.0%
Zone 12: 9.2%
Zone 13: 2.8%
Zone 14: 7.6%
Zone 15: 8.1%
Zone 16: 9.8%
Zone 17: 5.4%
Zone 18: 8.8%
Zone 19: 8.7%
Zone 20: 9.9%
Zone 21: 9.5%
Zone 22: 9.4%

Camera -> XYZ matrix:
1.385357 0.430941 0.797555
0.437873 1.671073 0.007964
-0.051003 -0.479127 4.310050

XYZ -> Camera matrix:
0.794479 -0.246904 -0.146559
-0.208113 0.662777 0.037286
-0.013733 0.070756 0.234426

I don't know if this is a good result or a bad one, but if it is a bad one I would like to know what I can do to make it better.

BTW My monitor is calibrated using a Syper 2 Pro to a 6500k 2.2 Gamma setting, and I have both a Colorimeter (a spyder2 pro)and a Spectocolorimeter (a printfix pro) To do all sorts of calibrating tests. I know that the sypder has the capacity to read colors off the screen.
« Last Edit: 15 / July / 2008, 12:46:16 by xbc »

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #263 on: 15 / July / 2008, 12:46:43 »
xbc
I included support for SD600 into 0.2.3-beta7: DNG4PS-2
To test your results, just press green "Save" button in calibration dialog and the program stores your color matrix for camera profile


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Offline bether

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Re: New project: camera color profile calculation
« Reply #264 on: 15 / July / 2008, 14:23:59 »
Defined and auto white balance would be fine in this project.

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #265 on: 15 / July / 2008, 23:02:01 »
bether, I don't understand you :)

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Offline bether

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Re: New project: camera color profile calculation
« Reply #266 on: 15 / July / 2008, 23:32:03 »
Sorry.
I thought about similar settings.

But maybe this is not necessary, because these DNG will be altered e.g. in photoshop.
« Last Edit: 15 / July / 2008, 23:42:08 by bether »

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #267 on: 16 / July / 2008, 02:55:31 »
bether, dnh4ps2 doesn't apply white balance, it only converts nonstandard CHDK RAW file into standart DNG one


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Offline xbc

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Re: New project: camera color profile calculation
« Reply #268 on: 16 / July / 2008, 17:02:20 »
I made some modifications for the 0.2.3 beta to compile in MacOSX Leopard. This is based on the work of
Sperber, I only modded some lines in the MAKEFILE for it to work with the 0.2.3 beta sources.

Follow the instructions at http://spebbe.googlepages.com/ and use this modded Makefile

Makefile

I also had to add

#define _UINT32

to the  src/external_libs/dng_types.h

becuase if not OSX refused to compile.

This is missing the cool logo that sperber put, but well it works. If you want I can also post the resulting binary. I know have a beta version for PC and OSX
« Last Edit: 16 / July / 2008, 17:07:32 by xbc »

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #269 on: 16 / July / 2008, 23:33:03 »
Better to write here about MacOS build: DNG4PS-2 Mac OS X build

 

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