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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 #310 on: 03 / October / 2008, 08:39:59 »
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The jpg's in reply #307 are the ones that the camera makes when taking the shot.
Please give me link. I don't know how to find reply #307 :)

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Offline vit40

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Re: New project: camera color profile calculation
« Reply #311 on: 03 / October / 2008, 11:50:40 »
ArtDen, did you try search for string    #307  on this page   8)

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #312 on: 03 / October / 2008, 11:57:05 »
Bingo! I've found it!!! :)

Re: New project: camera color profile calculation
« Reply #313 on: 03 / October / 2008, 16:03:49 »
Hello all,

since the powershot g9 chdk port is almost complete (thanks uvv!) here are the images for the color profile calculation (hope I've done it right)

Thanks ArtDen for your precious work!

bye

zSHARE - profile_img.zip
« Last Edit: 04 / October / 2008, 02:58:24 by bongo_bingo »


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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #314 on: 04 / October / 2008, 09:13:31 »
Stig, really sorry. I forgot to include color profile for IXUS 960IS / SD 950IS into beta 14. Beta 15 contains it :) You can try. Do not forget to reset options of  IXUS 960IS / SD 950IS to defaults after installing beta15.

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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #315 on: 04 / October / 2008, 09:17:07 »
bongo_bingo, RAW file from G9 already contains proper color profile. It is not necessary to calculate it :)

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Offline vit40

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Re: New project: camera color profile calculation
« Reply #316 on: 04 / October / 2008, 10:35:05 »
Yes, G9 is supported by Adobe, so color matrices can be extracted from dng, converted from cr2 file, but there's no need to do it. I used those values as starting point for calibrating my new A650, since it's the same sensor, but colors were quite off ... but as we know, we can't come close to in camera color processing with color matrix alone, hence Adobe introduced color profiles in last version of ACR, yielding much better results
« Last Edit: 04 / October / 2008, 10:37:16 by vit40 »

Re: New project: camera color profile calculation
« Reply #317 on: 04 / October / 2008, 13:58:35 »
Stig, really sorry. I forgot to include color profile for IXUS 960IS / SD 950IS into beta 14. Beta 15 contains it :) You can try. Do not forget to reset options of  IXUS 960IS / SD 950IS to defaults after installing beta15.

ArtDen, thank you so much, this works! For the files I just tried, Dng4ps beta 15 makes colors from IXUS 960IS / SD 950IS that are sufficiently close to the jpg's to work very well for me.

Perhaps red/orange/yellows seem a bit too saturated in comparison to jpg's straight from the camera (can be seen when converting the test photo from reply #293), but that is only a minor difference which can easily be adjusted in e.g. ACR if desired. Overall, the color rendition is very good.

Thank you again, ArtDen, this is great :-)

Do you have an idea why Dng4ps couldn't make the same colors when using the profile for A650IS which has the same sensor as IXUS960IS/SD950IS? Would Canon create different color renditions for the two camera models?
« Last Edit: 04 / October / 2008, 15:08:28 by Stig »


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Offline ArtDen

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Re: New project: camera color profile calculation
« Reply #318 on: 05 / October / 2008, 00:32:40 »
Do you have an idea why Dng4ps couldn't make the same colors when using the profile for A650IS which has the same sensor as IXUS960IS/SD950IS? Would Canon create different color renditions for the two camera models?
I have no any idea :)

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Offline vit40

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Re: New project: camera color profile calculation
« Reply #319 on: 05 / October / 2008, 02:54:32 »
Stig,

don't worry, I'll post A650IS color profile for ACR in a few days, just have to verify it on some real life photos.
As in case of A620, it's tuned to give same color rendition as my 400D with which I'm very satisfied. Of course, for now, these color profiles are usable only with ACR 4.5 and above ...


ArtDen,

are there any chances of adding customization for tags  Baseline Exposure and BaselineNoise in dng4ps2 ?
First one controls zero position of exposure slider. In my opinion, this tag should be zero, so you know exactly which parts of picture are blown and which are not, but for some strange reason, it is 0.5 I think, so exposuire is shifted 0.5 EV to the right. BaselineNoise also should be different from camera to camera, as sensors with higher pixel cont have higher noise etc.

In the meantime, I'm using my program to correct these tags, but it would be fine if I could set it in the dng4ps2

Thanx.
« Last Edit: 05 / October / 2008, 03:01:16 by vit40 »

 

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