Getting color intensity values

I'm trying to get color values for single points that I can then use to plot these points in sort of a "intensity scatter plot"

I would ideally like to set the caxis limits using my dataset min/max, then loop through the data and get RGB values for every point, that I could then use for the scatter plot.

Anyone know of any function that exists to do this?

[Walter Roberson]

Single points of what? Of an image? Of an array?

Do you mean "intensity" in the sense of luminance, or in the sense of point density ?

Answer 1

[Image Analyst]

See my answer here: http://www.mathworks.com/matlabcentral/answers/16644-rgb-colour-pixel-plot

I did make my own MATLAB-only 3D color gamut scatterplot but it's very slow and not as good as the ImageJ version. If you really want that, let me know.

Or perhaps you'd like this: http://blogs.mathworks.com/pick/2010/07/30/drawing-color-histograms-and-color-clouds/