16-05-2013 дата публикации
Номер: US20130121609A1
A method for restoring and enhancing a space based image of point or spot objects. The method includes: 1) dividing a space-variable degraded image into multiple space-invariant image sub-blocks, and constructing a point spread function for each of the image sub-blocks; 2) correcting each of the image sub-blocks via a space-invariant image correction method whereby obtaining a corrected image {circumflex over (f)}for each of the image sub-blocks; and 3) stitching the corrected image sub-blocks {circumflex over (f)}altogether via a stitching algorithm whereby obtaining a complete corrected image {circumflex over (f)}. 1. A method for restoring and enhancing a space based image of point or spot objects , the method comprising: [{'sub': 'i', 'claim-text': 'M determined by a distance between a photosensitive element and a lens axis;', '(1.1) dividing a gray-scale image on a focal plane into M image sub-blocks, said image sub-block indicated by f, i representing a serial number of each of said image sub-blocks, i=1, 2, . . . , M, a region within each of said image sub-blocks approximated as an isoplanatic region, and'}, {'sub': 'i1', '(1.2) pre-measuring a point spread function PSF(r) of each of said image sub-blocks by an optical device on the ground, and storing said point spread function in a database;'}, {'sub': 'i2', '(1.3) constructing a point spread function PSF(x, y) under a fuzzy random degradation effect in each of said image sub-blocks corresponding to a discrete photosensitive element array in a imaging focal plane; and'}, {'br': None, 'sub': i', 'i1', 'i2, 'i': x,y', 'x,y', 'x,y, 'PSF()=PSF()*PSF()'}, '(1.4) constructing an total function of each of said image sub-blocks;'}], '(1) dividing a space-variable degraded image into multiple space-invariant image sub-blocks, and constructing a point spread function for each of said image sub-blocks, the dividing and constructing comprising{'sub': 'i', '(2) correcting each of said image sub-blocks via a space- ...
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