[IPOL announce] new article: Screened Poisson Equation for Image Contrast Enhancement
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Mon Mar 17 11:58:29 CET 2014
A new article is available in IPOL: http://www.ipol.im/pub/art/2014/84/
Jean-Michel Morel, Ana-Belen Petro, and Catalina Sbert, Screened Poisson
Equation for Image Contrast Enhancement, Image Processing On Line, 4
(2014), pp. 16--29. http://dx.doi.org/10.5201/ipol.2014.84
Abstract
In this work we propose a discussion and detailed implementation of a
very simple gradient domain method that tries to eliminate the effect of
nonuniform illumination and at the same time preserves the images
details. This model, which to the best of our knowledge has not been
explored in spite of its simplicity, acts as a high pass filter. We show
that with a single contrast parameter (which keeps the same value in
most experiments), the model delivers state of the art results. They
compare favorably to results obtained with more complex algorithms. Our
algorithm is designed for all kinds of images, but with the special
specification of making minimal image detail alteration thanks to a
first order fidelity term, instead of the usual zero order term.
Experiments on non-uniform medical images and on hazy images illustrate
significant perception gain.
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