Simultaneous blind gamma estimation

Vazquez-Corral, Javier; Bertalmío, Marcelo

doi:http://dx.doi.org/10.1109/LSP.2015.2396299

Simultaneous blind gamma estimation

Citation

Vazquez-Corral J, Bertalmío M. Simultaneous blind gamma estimation. IEEE Signal Process Lett. 2015;22(9):1316-1320. doi:10.1109/LSP.2015.2396299

Abstract

Blind gamma estimation is the problem of estimating the gamma function that is applied to a linear image both for perceptual reasons and for the compensation of the non-linear behavior of displays. Gamma values change both inter- and intra-camera. In the latter case, the change comes from the use of different scene settings. In this letter we propose a new approach that relies on the use of more than a single image from the same scene. We estimate the gammas for all the different images at the same time with a method based on exploiting the structure of the standard in-camera processing pipeline. Our results improve over the state-of-the-art.