నైరూప్య

Color Filter Array Interpolation Using Adaptive Filter

P.Venkatesh, Dr .V.C.Veera Reddy, Dr T.Ramashri

Basically beam splitters are used to capture RGB image in digital cameras, which is very expensive. This paper proposes an inexpensive technique using color filter arrays instead of beam splitters in digital cameras. Color filter arrays are inexpensive because it uses single sensor to capture multi color information unlike beam splitters (which contains multi sensors). Single sensor digital cameras captures only one at each pixel location and the other two color information to be interpolated is called Color Filter Array (CFA) interpolation or demosaicking. Demosaicking of process is estimated using color difference/ ratio rule of an RGB image. After demosaicking to reduce the noise in the interpolated images, adaptive filter is used. Adaptive filter is preferred since it provides better performance in texture and edge regions of interpolated images by removing interpolation errors. The performance of developed algorithm “CFAI using adaptive filter” is evaluated using PSNR, which is calculated between captured image and interpolated image. Thus it is observed that the proposed algorithm is more robust with high PSNR.