3D histogram of RGB image

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John Andrew
John Andrew on 10 May 2015
Commented: Image Analyst on 11 Sep 2017
Hey guys! I'm performing the 3D histogram of RGB image my teacher said me there is a simple and faster way to do all what I'm doing with my code. But I do not find any reference that help me to achieve that.
I want to obtain the image attached. Does anyone knows how?

Accepted Answer

Image Analyst
Image Analyst on 11 May 2015
I just don't see how hist3 can do it. Despite it's poor choice of a name (in my opinion), it's really a 2D histogram, not a 3D histogram because there are only 2 independent variables. Try my color gamut visualizer program, attached way below, below all the images.
It's a primitive MATLAB version of the really nice one that is an ImageJ plugin.
Image Analyst
Image Analyst on 11 Sep 2017
Because indexes can't be zero, but gray levels can. You can't have indexes in the range 0-255, but you can in the range 1-256 so that's why 1 is added to the index.

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More Answers (1)

Thomas Koelen
Thomas Koelen on 11 May 2015

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