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## How I fixed Mona Lisa

### Eugene Demidenko

Dartmouth College

###
Thursday, April 20, 2006

L01 Carson Hall, 4 pm

Tea 3:30 pm, Math Lounge

**Abstract: ** The talk is about image statistics, namely, how
statistical approach can be used for digital image enhancement and
analysis. The existing image processing techniques deal with one image
at a time. However, current scientific problems require simultaneous
analysis of ensemble of images. An immediate consequence is the fact
that images of the same object, scene, tissue sample, vary. That is
why images are random and statistical approach becomes relevant. As
an example of a statistical approach, I apply the entropy principle to
optimal reduction of a color image to grayscale. It appears that the
entropy-transformation improves a fading color image of Mona
Lisa. Another application of image statistics is to cancer cells. In
particular, we want to determine if there is a synergy in chemotherapy
and radiation.

This talk will be accessible to undergraduates.