Charles Rosenberg, Thomas Minka, Alok Ladsariya, "Bayesian Color Constancy with Non-Gaussian Models", poster appeared at NIPS 2003.
Abstract, Paper (119K), ps.gz (95K).
More general information about color constancy can be found here.
Plots of slices of the three dimensional (32x32x32) color surface reflectance distribution along a single dimension:
- Row one plots green versus blue and slices in red whose magnitude increases from left to right.
- Row two plots red versus blue with slices in green whose magnitude increases from left to right.
- Row three plots red versus green with slices in blue whose magnitude increases from left to right.
Plots are scaled by a factor of 2 in each dimension to make the structure more visible.
Selected Result Images:
Click here for results for the full test set.
- the results presented here are meant for a qualitative visual comparison, please see the paper for quantitative results.
- the resulted presented here are for the "hull" restricted illuminant search
- the images here were preprocessed as follows to facilitate visual comparison:
- image data corrected using the diagonal model
- image size scaled down by a factor of 3 in each dimension using averaging (for data size)
- image data brightness normalized by scaling all channels so mean over all channels is 32
- gamma curve applied of 2.0
- missing images (broken links) were removed by the original data set preparers because of collection problems
- the data set was prepared by K. Barnard, L. Martin, B. Funt. and A. Coath and is available here
Following are some examples of the 2349 images used to train the cannonical color distribution.
A text file containing a list of the image file names can be found here.
The complete image set can be downloaded from this link as a 25MB tar file.
Please note that these images are provided for research purposes only. You will need to contact the copyright owners for publication / use rights.
Charles Rosenberg Created: Fri Jun 6 2003 -- Last modified: Sat Nov 13 01:44:15 EST 2004