histogram computations

[yupina-chan]

hi. i need to get the histogram of an image and after which, i will perform histogram matching for detection. how can i compute for histogram in fpga? any references or sample computations for this? thanks in advance

 

[TrickyDicky]

You need a memory to store the histogram data. Then you simply do a read, +1 and write back into the appropriate bin.

 

[yupina-chan]

what conditions am i going to look for in the image pixels to determine into which bin they are?

 

[TrickyDicky]

Usually you just do it on image intensity. So for a standard black and white image, you need 256 bins (256 grey levels). You may struggle with full colour (24bit) images, as that requires a large amount of memory. You're only usually interested in intensity anyway.

What is the system supposed to do?