Correction of the sharpness of the space image based on the terrain model of the area

An algorithm for correcting sharpness and spatial resolution using the technology of providing ultra-high resolution mode on a digital space image without involving physically implemented additional remote sensing channels is considered. The algorithm is based on the application of the method of perturbations in finite differences in the Fraunhofer zone for scattering the incident light flux on a digital terrain model reconstructed from the shadows in the original image. The sharpness correction is preemptively accompanied by the synthesis and optimization of the frequency-contrast characteristic of the sensing path formed for this image. The possible excess of the spatial-frequency band of the result over the bands of the partial patterns involved in the synthesis can be qualified as an ultra-high resolution.