The Rehabilitation of MaxRGB
Funt, B. and Shi, L.,
"The Rehabilitation of MaxRGB,"
Proc. IS&T Eighteenth Color Imaging Conference, San Antonio, Nov. 2010.
Abstract:
The poor performance of the MaxRGB illumination-
estimation method is often used in the literature as a foil when
promoting some new illumination-estimation method. However,
the results presented here show that in fact MaxRGB works
surprisingly well when tested on a new dataset of 105 high
dynamic range images, and also better than previously reported
when some simple pre-processing is applied to the images of the
standard 321 image set [1]. The HDR images in the dataset for
color constancy research were constructed in the standard way
from multiple exposures of the same scene. The color of the scene
illumination was determined by photographing an extra HDR
image of the scene with 4 Gretag Macbeth mini Colorcheckers at
45 degrees relative to one another placed in it. With
preprocessing, MaxRGB’s performance is statistically equivalent
to that of Color by Correlation [2] and statistically superior to that
of the Greyedge [3] algorithm on the 321 set (null hypothesis
rejected at the 5% significance level). It also performs as well as
Greyedge on the HDR set. These results demonstrate that
MaxRGB is far more effective than it has been reputed to be so
long as it is applied to image data that encodes the full dynamic
range of the original scene.
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