Programmatically create histograms like Color Thresholder
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How can I programaticlly in Matlab code create image histograms that look like the ones in Color Thresholder? I don't want to launch Color Thresholder from the Matlab prompt. I want to generate my own histograms that looks like the ones in Color Thresholder. Ideally I would like to create this identical histogram in a script without having to manually open Color Thresholder, load my image, and then switch to YCbCr.
回答（2 个）
Image Analyst
2022-11-16
0 个投票
See attached demo. Adapt as needed. You can use bar() instead of plot() to make histograms like those.
2 个评论
Jiang Karen
2025-5-9
How can I get that gradient fill? I hope you can answer. Thank you.
Image Analyst
2025-5-9
I don't know off the top of my head if that is possible. I'd have to research it, which you can do just as well as me.
In this answer I give a couple ways to create colorcoded histograms for multichannel images the long way. In the comments, I describe a third party tool that will simplify the task of figure setup and colormap generation for most colorspaces you might be trying to use.
One of the comments also covers the difference between the way I generated axis-aligned colormaps for YCbCr, compared to the way that the Color Threshold app represents them. So if you really want to replicate that specific set of fill colors, you can.
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2022-11-16
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