000134575 001__ 134575
000134575 005__ 20190316234517.0
000134575 0247_ $$2doi$$a10.1117/12.807598
000134575 037__ $$aCONF
000134575 245__ $$aOptimal Color Filter Array Design: Quantitative Conditions and an Efficient Search Procedure
000134575 269__ $$a2009
000134575 260__ $$c2009
000134575 336__ $$aConference Papers
000134575 520__ $$aMost digital cameras employ a spatial subsampling process, implemented as a color filter array (CFA), to capture color images. The choice of CFA patterns has a great impact on the performance of subsequent reconstruction (demosaicking) algorithms. In this work, we propose a quantitative theory for optimal CFA design. We view the CFA sampling process as an encoding (low- dimensional approximation) operation and, correspondingly, demosaicking as the best decoding (reconstruction) operation. Finding the optimal CFA is thus equivalent to finding the optimal approximation scheme for the original signals with minimum information loss. We present several quantitative conditions for optimal CFA design, and propose an efficient computational procedure to search for the best CFAs that satisfy these conditions. Numerical experiments show that the optimal CFA patterns designed from the proposed procedure can effectively retain the information of the original full-color images. In particular, with the designed CFA patterns, high quality demosaicking can be achieved by using simple and efficient linear filtering operations in the polyphase domain. The visual qualities of the reconstructed images are competitive to those obtained by the state-of-the-art adaptive demosaicking algorithms based on the Bayer pattern.
000134575 6531_ $$acolor acquisition
000134575 6531_ $$acolor filter array
000134575 6531_ $$asampling
000134575 6531_ $$ademosaicking
000134575 6531_ $$ademosaicing
000134575 700__ $$aLu, Yue M.
000134575 700__ $$0240184$$aVetterli, Martin$$g107537
000134575 7112_ $$aSPIE Electronic Imaging, Digital Photography V$$cSan Jose, CA, USA$$dJanuary 18-22, 2009
000134575 773__ $$j7250$$tProc. SPIE Conference on Digital Photography V
000134575 8564_ $$s287538$$uhttps://infoscience.epfl.ch/record/134575/files/725009_1%281%29.pdf$$yn/a$$zn/a
000134575 909C0 $$0252056$$pLCAV$$xU10434
000134575 909CO $$ooai:infoscience.tind.io:134575$$pconf$$pIC$$qGLOBAL_SET
000134575 917Z8 $$x222073
000134575 937__ $$aLCAV-CONF-2009-008
000134575 973__ $$aEPFL$$rNON-REVIEWED$$sPUBLISHED
000134575 980__ $$aCONF