Patent ID: 6058220
Filing Date: 2000-05-02
Classification: H04N

Abstract:
A device for scanning a charge image produced along the surface of a previously locally uniformly charged photoconductor by an exposure of said photoconductor to X-ray radiation, said device comprising:a plurality of electrometer probes arranged in a row in a direction for positioning relative to the surface of the photoconductor to provide from the respective probes, output signal values of respective pixels of the charge image on the photoconductor along a current position of said row;means for successively displacing the current position of said row relative to the surface of the semiconductor in a direction perpendicular to the direction of the row;analog-to-digital converter means for digitizing said output signal values of the pixels of said charge image;first memory means for storing said digitized output signal values, said stored digitized values corresponding to a first image, said probes causing streaks in the first image directed in the direction; perpendicular to the direction of the row, andspatial filtering means responsive to said stored digitized values in said first memory corresponding to said first image for forming an output image in which said streaks are attenuated by filtering spatial frequencies of said first image in such a manner that any parts of said first image containing high frequencies in the direction of the row and low frequencies in the direction perpendicular to the direction of the row are attenuated.