Interesting plugin. Not sure how I missed it after checking all of yours.
But anyway, if the image I'd like to extract from contains more than 96 unique colors, it would delete the rest or something? Or, I guess it would do this: "If reduced to less than 1000 Colors you can edit the color table." - but I'm not sure exactly what that means.
Well, the main thing is that plugin seems to be sorta buggy. I posted the issues in the thread. And since it's buggy, I can't help but wonder if it's extracting properly. Also, I'm just generally curious what other options are out there for extracting colors from images.
What exactly do you mean by "customize the output"? The plugin looks interesting, though. From what I can tell, it will basically save the colors of your image into a text file? So, this is basically extracting each color like I'm asking for? Or am I misunderstanding how it works?