New project: camera color profile calculation - page 33 - RAW Shooting and Processing - CHDK Forum  

New project: camera color profile calculation

  • 480 Replies
  • 323172 Views
*

Offline silas

  • *
  • 19
Re: New project: camera color profile calculation
« Reply #320 on: 05 / October / 2008, 06:35:04 »
Advertisements
a550:
http://www.humyo.com/F/644375-213357927

Re: New project: camera color profile calculation
« Reply #321 on: 05 / October / 2008, 07:20:48 »
Stig,
don't worry, I'll post A650IS color profile for ACR in a few days,

vit40,

Very interesting.

1. Is it correctly understood, that this is a finetuning of the color of a DNG made with Dng4ps2?

2. What will the workflow be (from CHDK raw to a DNG or other file with correct colors) when using the color profile for ACR you have created?

3. Since the color rendition of A650IS is apparently different from IXUS960IS/SD950IS, I expect that the A650IS color profile for ACR will not provide correct colors when applied to an image file from IXUS960IS/SD950IS. Wouldn't you agree?
« Last Edit: 05 / October / 2008, 07:30:34 by Stig »

Re: New project: camera color profile calculation
« Reply #322 on: 05 / October / 2008, 11:08:40 »
ArtDen can you include g9 profile in your dng4ps?

*

Offline ArtDen

  • ***
  • 175
    • dng4ps2
Re: New project: camera color profile calculation
« Reply #323 on: 05 / October / 2008, 13:06:46 »
bongo_bingo, Just use adobe dng converter to convert G9 RAW files into DNG ones


*

Offline ArtDen

  • ***
  • 175
    • dng4ps2
Re: New project: camera color profile calculation
« Reply #324 on: 05 / October / 2008, 13:14:37 »
vit40, I will think about new options for conversion. Values of Baseline Exposure and BaselineNoise were taken from old dng4ps

*

Offline ArtDen

  • ***
  • 175
    • dng4ps2
Re: New project: camera color profile calculation
« Reply #325 on: 05 / October / 2008, 13:16:48 »
silas, please upload RAW file together with jpegs

*

Offline silas

  • *
  • 19
Re: New project: camera color profile calculation
« Reply #326 on: 06 / October / 2008, 01:51:05 »
can do this later

*

Offline vit40

  • ****
  • 276
Re: New project: camera color profile calculation
« Reply #327 on: 06 / October / 2008, 04:08:11 »
Stig,

1 - yes, dng color profiles consist of transform matrix and additional lookup tables to slightly modif colors after conversion that was performed using color matrix. Matrix in dng (provided by dng4ps2 for example) is disregarded and the one from profile is used

2- workflow is very simple - you have to save color profile in camera raw map. Dng4ps2 is used as is, no matrix change for that camera needed. After opening dng files, you just select embeded matrix or one of color profiles for that camera (if you have more than one). For details, see the thread DNG color profiles - end of color problem and follow the link to Adobe Labs site

3- if you have a dng from Ixus, you won't se profiles for A650 in ACR, so you can't use them

Anyway, as I said, I tuned color profile to give me same colors as Adobe color profile for 400D. Rendering of in-camera jpegs is slightly different, but I was satisfied with Adobe's rendering. You will try and see if you like the result or not. It is also possible to tune individual colors further with Adobe profile editor and save modified version


Re: New project: camera color profile calculation
« Reply #328 on: 06 / October / 2008, 13:44:26 »
bongo_bingo, Just use adobe dng converter to convert G9 RAW files into DNG ones

Hi ArtDen, thanks for yhe info, adobe dng converter works very well for cr2 files (native g9 raw format), but doesn't work with crw files produced with the g9 wich I'm still unable to develop (it writes that  can't recognize the format).
Maybe I not need crw files from g9, but I was corious to wich differences between the two format.

Bye
« Last Edit: 06 / October / 2008, 13:46:24 by bongo_bingo »

*

Offline ArtDen

  • ***
  • 175
    • dng4ps2
Re: New project: camera color profile calculation
« Reply #329 on: 06 / October / 2008, 13:54:39 »
bongo_bingo, use ONLY native g9 RAW format. It contains many useful values: preview, color profile, exif values etc apart from a raw image, whereas a hacked RAW file contains only raw image from camera sensor.

 

Related Topics


SimplePortal 2.3.6 © 2008-2014, SimplePortal