PhotoLab-Colorblindtools is a set of tools for digital pictures
PhotoLab Colorblindtools is a separate subset of PhotoLab. It's a separated part of Photolab because it is useful only for colorblind peoples.
Version: 1.0.0 changed october 17 2009, author: Raymond Ostertag, License : GNU/GPL.
Languages: english and french.
Type: Python-fu for Gimp-2, tested with Gimp-2.6.6 under Linux and Windows.
Installation : Download 7zip or tar.gz archives. Each archive contain a text help file en english. The Python-fu must be copied in the user directory at .gimp-2.6/plug-ins. Under Linux and Mac they must be executables.
Download : You can download archives separatly by following the link of the summary below or download all in one in 7zip PhotoLabo-ColorblindTools-22.214.171.124z or tar.gz format PhotoLabo-ColorblindTools-1.0.0.tar.gz
Utilisation : There is no parameters and then no dialog box when one launch the script! It's done like that intentionnaly. The scripts are intended to be used in association with a keyboard shortcut (learn how to add a keyboard shortcut at http://docs.gimp.org/2.6/en/gimp-concepts-shortcuts.html). After choosing a keyboard shortcut, push once on the shortcut to apply and visualize the effect of the script. Push again the shortcut to come back to your original picture.
Example on Ishihara test 23 for colorblind people. The image 1 is the original and cause problems to red or green colorblind peoples, they see only one digit. On image 2, after red and blue switch, the number 42 is clearly visible.
Switch the content of two color channel, blue/green or blue/red. People who are red, green or blue colorblind can still see the content of the two other channels. Switching the affected channel with another channel make the content visible but of course in a other color. It helps to detect if a photo has two much red, green or blue without seeing it directly.
The image 1 is the original photo. The image 2 is the photo with a layer increasing intensity of green. The image 3 is the photo with a layer increasing intensity of red.
Add a layer on top of the image who increase the content of a color channel, blue, green or red. People who have deficiency only in red, green or blue channel can still view the affected channel but at low intensity and with low contrats. Increasing the content of the affected channel restore the contrast.
Download ColoredLayers 7zip ColoredLayers tar.gz Menu location: Colors / Colorblind tools / Add/Remove red layer and Colors / Colorblind tools / Add/Remove green layer and Colors / Colorblind tools / Add/Remove blue layer
The image 1 is the original photo. The image 2 is the hue vision of the photo.
Add a layer on top of the image who show the content of the hue channel with vivid (full saturation) colors. The pixels at hue 0 (no color) are showed in white. This show you at the maximum possible which part of the image is red, green and blue. Colorblind people need probably more info and then can use the RGB decompose who separate the content for each primary channel, red, green and blue. Each layer show what part of the image is around red (from magenta to yellow), around green (from yellow to cyan) and around blue (from cyan to magenta).