A Variational Approach to the Radiometric Enhancement of Digital Imagery

Irfan Altas, John Louis, John Belward

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


In this correspondence, we present a variational approach to the problem of finding suitable radiometric image transformations that optimize desirable characteristics of the output image histogram. This variational approach can be interpreted as the minimization of the cumulative spacing between histogram bars in the least squares sense subject to some weight function. Most of the common histogram transformation procedures used in remote sensing applications can be deduced from this general variational approach with an appropriate choice of the weight function.

Original languageEnglish
Pages (from-to)845-849
Number of pages5
JournalIEEE Transactions on Image Processing
Issue number6
Publication statusPublished - Jun 1995


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