Well, if your machine-readable color key fades as well, maybe it's not so much of a showstopper if the colors fade. The primary problem I see is that so many i

Well, if your machine-readable color key fades as well, maybe it's not so much of a showstopper if the colors fade. The primary problem I see is that so many industrial cameras today are black and white. B&W cameras can send at a higher framerate and you don't need to convert to greyscale as your first step in your algorithm, so it saves time to use b&w cameras.