I'm working on making histograms of pixel values for several rasters to compare them and produce reasonably good graphics. I am using the Spatial analyst toolbar to create a histogram for the rasters but what it gives me is a histogram of the color values in the raster and not the actual pixel values.
In this image the X axis would ideally show the pixel values from 0 to 3273.
I have tried using zonal histograms and zonal statistics but neither produce a more accurate histogram and using the histogram button on the properties tab (shown below) does not produce anywhere near a useable graphic.