Scanning heterodyne reconstruction of coded aperture images

Optical image coding with a circular Dammann grating

“…The reconstruction of coded images is usually accomplished digitally [8], but the task is often computationally demanding, as the coded image has a much larger space-bandwidth product than that of the data itself [9]. For this reason, optical reconstruction techniques have been investigated [10][11][12][13]. In this paper we investigate an optical scanning system for image coding.…”

“…Our scheme is to find a function that can be used for coding as well as decoding, which simplifies the procedures of coding and decoding. The coding and decoding scheme discussed here is reminiscent of coded aperture imaging already mentioned [6][7][8][9][10][11][12][13]. In general, the apertures are selected to have some desirable autocorrelation or cross-correlation properties such that the coded image can be decoded to extract the original image.…”