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Image Colour Analysis

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Image Colour Analysis GiuseppeD. via gimp-developer-list 25 Jun 09:41
  Image Colour Analysis Liam R E Quin 26 Jun 19:17
  Image Colour Analysis Elle Stone 26 Jun 19:45
GiuseppeD. via gimp-developer-list
2018-06-25 09:41:50 UTC (almost 6 years ago)

Image Colour Analysis

Dears,
I would do a colour analysis on my picture. I already took picture with a colour palette for calibration.
What do I do now for calibrate with my colour reference? How can I have RGB data after the calibration?
Thanks

--
Sent from: http://gimp.1065349.n5.nabble.com/Developers-f15145.html

Liam R E Quin
2018-06-26 19:17:24 UTC (almost 6 years ago)

Image Colour Analysis

On Mon, 2018-06-25 at 02:41 -0700, GiuseppeD. via gimp-developer-list wrote:

Dears,
I would do a colour analysis on my picture. I already took picture with a
colour palette for calibration.
What do I do now for calibrate with my colour reference? How can I have RGB data after the calibration?

Which Linux distribution are you using? There should be colour management software included which can take the picture of the photo card and make a colour profile.

If you do not have that software, another way is to open the card in gimp, use the colour->levels tool and click on the black, the white, the grey patches with the black point, white point, grey point eye droppers in the levels dialogue and hit OK.

Then open your photo, open colours->levels, and apply the same settings from the history dropdown at the top of the dialogue box.

Liam

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Elle Stone
2018-06-26 19:45:16 UTC (almost 6 years ago)

Image Colour Analysis

On 06/25/2018 05:41 AM, GiuseppeD. via gimp-developer-list wrote:

Dears,
I would do a colour analysis on my picture. I already took picture with a colour palette for calibration.
What do I do now for calibrate with my colour reference? How can I have RGB data after the calibration?
Thanks

Hi,

What is this "picture with a colour palette for calibration" used for? Can you provide a link to the actual image?

Is the picture for setting white point, black point, and color balance when the picture is included in the camera shot, as per this bug report?

https://gitlab.gnome.org/GNOME/gimp/issues/624

Best regards, Elle

https://ninedegreesbelow.com
Color management and free/libre photography