These images are the result of filtering with a Hurlbert regularization filter, then biasing to gray. A relaxation was then applied, taking into account edges in luminance to constrain the color diffusion within regions belonging to a single surface.
Two dimensional histograms of the computed images are available: chromaticity and Red vs. Blue
| Gamut | Illuminant A | Illuminant B | Illuminant C |
|---|---|---|---|
| All |  |
 |
 |
| Little Blue |
 |
 |
 |
| Little Red |
 |
 |
 |
Below is the actual frequency response of the filter.
