How can i plot Histogram for this??

2015 7 21
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更新时间：2015 7 21
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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 ?

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Image Analyst
Image Analyst 2015-7-21

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

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dp sb
dp sb 2015-7-21
Thank You! I do get the pixel counts with that but now how can i get the histogram with the same 3 bins ??
Image Analyst
Image Analyst 2015-7-21
pixelCounts is the histogram. Or do you mean how to display it? Try the bar function
bar(pixelCounts, 'BarWidth', 1, 'FaceColor', 'b');
dp sb
dp sb 2015-7-21
It works. Thank You!
Steven Lord
Steven Lord 2015-7-21
Or call HISTOGRAM instead of HISTCOUNTS. If you want both the counts and the graphics object, call HISTOGRAM with an output argument and take a look at the properties of that graphics object.

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