2pm, Thursday 2, November 2006
<center>
<b>
Evaluation of Spatial Gamut Mapping Algorithms
</b>
<br><br>
Nicolas Bonnier
<br><br>
</center>
We propose an independent evaluation of Spatial Gamut Mapping Algorithms
(SGMAs) by a psychophysical experiment comparing five gamut mapping
algorithms, two point-wise and, two point-wise and three spatially
adaptive applied to fifteen images. Results show that reproduction from
SGMAs were rated best and indicate that among SGMAs, observers attached
more importance to the preservation of saturation and of the global
contrast than to the rendering of details. The results of this
psychophysical experiment are then compared to selected Image Quality
Metrics (IQMs) to investigate their possible utilization in the
implementation and evaluation of new GMAs. The comparison demonstrate
that while IQMs do not present a conclusive correlation, theu are still
able to extract useful information about the local distortion caused by
the gamut mapping algorithms.


<p>
<a href="index.html"> Back </a>