RSS/Atom feed Twitter
Site is read-only, email is disabled

Image Colour Analysis

This discussion is connected to the gimp-developer-list.gnome.org mailing list which is provided by the GIMP developers and not related to gimpusers.com.

This is a read-only list on gimpusers.com so this discussion thread is read-only, too.

3 of 3 messages available
Toggle history

Please log in to manage your subscriptions.

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 (over 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 (over 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

Liam Quin - web slave for https://www.fromoldbooks.org/
with fabulous vintage art and fascinating texts to read.
Click here to have the slave rewarded with a dog biscuit.
Elle Stone
2018-06-26 19:45:16 UTC (over 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