3CCD interpolation using selective projection

The emergence of HDTV accelerates the evolution of high-resolution imaging systems. A 3CCD digital camera system has been developed for higher resolution than one CCD imaging has. From the pixel correlation caused by a half-pixel shift of the green channel, we can interpolate pixels and get four times higher resolution of the color image. The proposed method involves three projection operators. The first is to reduce aliasing of image regions by selective projection in subband channels. The second projection makes an inverse of the MTF which generates blurring over the entire image. The last operator works for fast convergence. From experimental results, the proposed algorithm shows suppression of jagging effects and restoration of aliased image regions. It is experimentally shown that the projection process converges and is almost finished at the first iteration.