Actually that looks easy. The edges all have straight lines. All you nave to do is measure the straight line lengths for each RGB value. That will match up easier than letters. For example Blue = 16 pixels, red = 6 pixels, blue = 12 pixels. Will then match another section Blue = 15 to 17 pixels, red = 5 to 7 pixels, blue = 11 to 13 pixels. You get a nice map every time of several results. I only showed 3 results per line. But in fact there are many results per line, so If you get 10 results per line it is almost impossible to make a mistake.