Abstract: The present invention relates to a method for the correction of perspective deformation in a lens system (1) in which image data, which describe an image projected through the lens system, are corrected with correction values and the image data corrected in this way are output for the display of a corrected image. A correction of the perspective deformation is obtained with the present invention in a simple manner in that the angular position of the lens system (1) on producing the image data acquires reproducing angular position data, a record of angular position correction data, which match the angular position data, are read out of a data base, in which a large number of data records have been saved for different angular positions of the lens system (1), and the image data are corrected with the determined angular position correction data.

Abstract: The invention is concerned with a device for determining an intensity and/or color and/or sharpness profile in each case of an optical lens system (3), which projects a test pattern (1) consisting of measuring fields (5), wherein the projection is directed indirectly or directly in each case toward a sensor area (6) of electronic color and brightness sensors of high resolution, whose measured signals, which are correlated to the measuring fields (5), are sent to a computer (60), which determines from these the intensity and/or color and/or sharpness profile and/or distortion propagation profile, outputs them to an image processing system (62) for an electronic image flaw correction of images (B) that were generated by an identical lens system (3), and stores them or temporarily stores them on a data carrier (61).