I'd like to determine the frequency distribution of RGB colours in a 24-bit
BMP. I tried to use the brute-force approach of creating an array of bins
[0..16777215] of integer, and then simply incrementing the appropriate bin
using the RGB value as the index, but Delphi7 didn't even tell me why it
crashed! This approach works for 8-bit or 12-bit values, and the help tells
me I can create an array up to 2GB. The above-mentioned array is only (!)
64MB, and my computer has 512MB.
I'm not looking to simply count the number of different colours; the routine
suggested by Earl Glynn on his website does that nicely. I want to know
what each one is, and how many times it appears in the image, i.e.
Colour 0: R=12, R=234, B=45, number = 165
and so on, with (obviously) the sum of all the individual numbers being the
total number of pixels in the image.