Make values on y-axis in histogram to shrink.

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LOKESH
LOKESH 2012-4-22
I have a Histogram of Binary Image. On y-axis I have values up to 2000. How can make it small so that the graph appears big. For example how can show only 1000 values on y-axis instead of 2000..
Thanks

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回答（2 个）

Walter Roberson
Walter Roberson 2012-4-22
Change the number of bins in the histogram.
Image Analyst
Image Analyst 2012-4-22
A binary image will have only two bins, one at 0 and one at 1, since there are only two values (false and true, or 0 and 1) in the image. One bin will have some number of counts, like 1500, and the other bin will contain a value equal to the number of pixels in the image minus the count in the other bin.
If you want to clip the y axis to some value, you can use ylim:
ylim([0 1000]);
If you want to compress the y scale, then you can plot the log of the y values (the count values) instead of using it linearly:
pixelCounts = imhist(binaryImage, 2);
bar(log(pixelCounts));
but be sure to adjust the y axis labels to be the original y values instead of the logged y values.

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