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2008
IEEE

Automatic tonal harmonization for multi-spectral mosaics

9 years 4 months ago
Automatic tonal harmonization for multi-spectral mosaics
When producing a mosaic of multiple multi-spectral images one needs to harmonize the colours so that the tone transition is smooth from one image to the other. Given two images Ima and Imb , a transform T is sought to map Imb to an image that is harmonious in multi-spectral appearance to Ima . We give the above problem of tonal harmonization an analytical framework, in which both ideal and practical solutions of the problem are studied. Using a physically motivated image formation model, we prove that a perfect tonal harmonizing operator cannot in general be found, but that whenever such an operator exists it is linear. In the latter case, finding the optimal harmonizing transformation can be cast as a linear programme (LP), which is a type of problem that can be efficiently solved using known techniques. Finally, strong empirical evidence is provided for the efficacy of the proposed solution.
Pouya Dehghani Tafti, Xiaolin Wu
Added 20 Oct 2009
Updated 27 Oct 2009
Type Conference
Year 2008
Where ICIP
Authors Pouya Dehghani Tafti, Xiaolin Wu
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