MATLAB: How can i plot Histogram for this?

histogramimage processingImage Processing Toolboxpixel

How can i plot histogram for an image with 3 bins, where the bins holds the pixel values falling in the region 0-40, 41-90, 91-255. Also how can i write these stats, as in the number of pixels in each of those regions. Plz Help ?

Best Answer

Try

edges = [0,41,91,255];
pixelCounts = histcounts(grayImage(:), edges);

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https://www.mathworks.com/matlabcentral/answers/368029-how-to-sketch-the-following-signal-x-t-3u-t-10-4u-t-3-r-t-2-4r-t-2u-t-2-2r-t-3-2u-t-4#answer_292042

MATLAB: Can someone help me loop this?

Rather than sweating out a vectorization, it's a lot easier to do it with a single for-loop. Also it may be just as fast or faster.

 n = 4;
 m = 21;
 std_t = zeros(m,size(pc,2));
 for k = 1:m
  std_t(k,:) = std(pc(k:k+n-1,:)-repmat(MA(k,:),n,1),1);
 end

The rows of 'std_t' are your vectors std_t1, vtd_t2, etc. Make sure 'pc' is defined up to m+n-1 rows.

Best Answer

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MATLAB: How to plot something like this?

MATLAB: Can someone help me loop this?

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