For every picture (e.g. bmp, png), a transparent point actually does have a color
The transparency is either
- defined by alpha channel mask (e.g. in PNG)
- or one of the colors is defined as transparent, and the viewer program is responsible to replace pixels with this color - as transparent.
I have a strange scenario, where one program knows transparency, the other doesn't so it shows the original color.
I want to replace the color only in the pixels where it is defined to be transparent. I need it all to be defined as white, while keeping it transparent
I can pre-convert my input to be a specific format, if it helps the process.
For now my toolbox includes: ImageMagick, Gimp, python programming (PIL) and maybe more, but I don't know how to do this specific task with these tools.