PEL-adaptive model-based interpolation of spatially subsampled images

The authors propose a scheme for interpolation of spatially subsampled images. The theoretical formulation is based on the fundamental assumption that luminance remains constant along the generalized path motion of a pixel in the image plane. This constant luminance model (CLM) of the intensity function in turn leads to a constraint equation, the solution to which is used to compute the unknown intensities. Due to the generalized nature of the algorithm, the most highly visible artifact associated with previously developed methods is significantly suppressed, thereby resulting in noticeably enhanced reconstructed images