Opto-Electronic Systems Research. Image Recovery from Partial Fresnel Zone Information

摘要

The problem of reconstructing an unknown image from partial data in the Fresnel zone region is discussed. An iterative method of reconstructing an unknown image from either the phase-only or magnitude-only data in the transform domain, is investigated through the use of digital calculations. From the Fourier transform plane through the Fresnel region, it is demonstrated that the phase-only information in the transform allows for a very good reconstruction in just a few iterations. While reconstructing an image from the magnitude of the Fourier transform is very difficult, as one moves further into the Fresnel zone region, good reconstructions are obtained in only several iterations. (RH)