[IPOL discuss] [IPOL announce] new article: Screened Poisson Equation for Image Contrast Enhancement

[announcements about the IPOL journal]

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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