Here are histograms of the "red" sensor channel versus the "blue" sensor channel for the gray world corrected test images. The blue channel is represented along the horizontal axis, and the red channel along the vertical. The range of each channel is 0 to 255.
| Gamut | Illuminant A | Illuminant B | Illuminant C |
|---|---|---|---|
| All |  |
 |
 |
| Little Blue |
 |
 |
 |
| Little Red |
 |
 |
 |
Histograms of the corrected images chromaticity space (instead of this sensor space) are also available.
For comparison, here are the histograms of the original images in the same sensor space.
Finally, the simple Isis script used to histogram the images is hist2.isis.