This is hard to word properly. I would like to monitor a specific section of a digital display to note whether the pixels change colors. In effect, if the pixels are red, Processing returns this info and does something. If the pixels are green, Processing does something else, etc. So far, I know that Processing can parse data as it is loaded into a sketch but I would like for it to just "oversee" what is being displayed onto the screen. Is this possible? Maybe the sketch could mirror that section of display and then parse from there, so all of the data does not have to be loaded?

I feel like my description is terrible but if anyone has any info that would be great.

Thanks!