METHOD FOR RESTORATION OF IMAGES WHICH ARE AFFECTED BY IMPERFECTIONS, DEVICE FOR IMPLEMENTATION OF THIS, AND THE CORRESPONDING APPLICATIONS

摘要

Method for restoring images obtained with image-capturing devices, starting with the characterisation of the downgrading of the images by means of the function of dispersion of a point (PSF) at one or more positions on the object plane, and, optionally, for one or more focussing positions, also the power spectral density (PSD) of the noise. The method is applied in two steps: (1) pre-filtering of quadratic minimum error for compensation of the blurring caused by the PSF; and (2) elimination of noise. The optimisation can be carried out in accordance with an error model of the method for elimination of noise (2), or, in the absence of a model, empirically with a filter, the free parameter of which is optimised for a set of pairs of original/downgraded training images, and of pairs (PSF/PSD) of noise.