MATLAB: Threshold multiple values at the same time

adaptive thresholdglobal thresholdlocal thresholdmean medianthresholding

Hi am I trying to find the value of a global threshold (mean, median, 50, 100, 150, 200)
Can someone assist me asap please?
TIA!

Best Answer

nd = ndims(YourImageArray);
Thresholded_arrays = bsxfun(@le, YourImageArray, reshape([50, 100, 150, 200], [ones(1,nd), 4]) );
Now Thresholded_arrays is one higher dimension than your original array. For example if your original array was 512 x 768 x 3 x 128 (that is, a stack of 128 RGB images each of which is 512 x 768 pixels), then Thresholded_arrays would be 512 x 768 x 3 x 128 x 4, and Thresholded_arrays(:,:,:,:,1) would be YourImageArray thresholded at value 50.
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