Title :
A generic demosaicing algorithm based on a diffusion model
Author :
Hore, Alain ; Ziou, Djemel ; Auclair-Fortier, Marie-Flavie
Author_Institution :
Dept. of Comput. Sci., Univ. of Sherbrooke, Sherbrooke, QC, Canada
Abstract :
In this paper, a diffusion-based generic demosaicing algorithm is proposed which can be used for various sensor images captured by digital cameras equipped with various RGB color filter arrays. This algorithm improves our previous edge-sensing generic demosaicing algorithm by enhancing the computation of the green band. In fact, since the green band plays a major and crucial role in the performance of the edge-sensing generic demosaicing algorithm, a diffusion-based model is used for reducing the errors generated when computing the green band. A series of tests has been made on images of the Kodak database, and our diffusion-based demosaicing algorithm performs better than the edge-sensing generic demosaicing algorithm in regard to both subjective and objective evaluation.
Keywords :
cameras; filtering theory; image colour analysis; image segmentation; Kodak database; RGB color filter arrays; diffusion-based generic demosaicing algorithm; digital cameras; edge-sensing generic demosaicing algorithm; error reduction; green band; objective evaluation; sensor images; subjective evaluation; Computational modeling; Diffusion processes; Image color analysis; Image edge detection; Image reconstruction; Interpolation; Mathematical model; Demosaicing; color filter array; diffusion; inverse diffusivity; spectral interpolation;
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on
Conference_Location :
Vancouver, BC
DOI :
10.1109/ICASSP.2013.6638103
