I'm working on image processing, and I have an image that has been DCT'd and quantized for 8 x 8 blocks of the 512 x 512 matrix, now I have to find how many quantizing levels that the image has. Do I need to take the top left pixel and place it in to an array and then place this on a graph calling hist?
Finding number of quantizing layers in MATLAB
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length(unique(x(:))), wherexis your image array. This is appropriate for grayscale images.