Angular dependence of sampling MTF 0

Sampling MiT defined in Park,' Hock,2 and de Luca,3 as an x and y sampling, can be generalized for image data not along x and y directions. For a given sampling lattice (such as in a laser printer, a scene projector, or a focal plane array), we construct a two-dimensional sampling MiT based on the distance between nearest samples in each direction. Because the intersample distance depends on direction, the sampling MiT will be best in the directions of highest spatial sampling, and poorer in the directions of sparse sampling. We compare hexagonal and rectangular lattices in terms of their equivalent spatial frequency bandwidth. We filter images as demonstration of the angular-dependent two-dimensional sampling MTF.