Schaltungsanordnung zur Grauwertkorrektur von Videosignalen

摘要

The invention concerns a switch arrangement for correcting picture halftone values of the video signals of a semiconductor line image camera the diode lines of which can be illuminated by a light source and produce an image of an object located in the path of the beam in the form of a shadow on the pick-up equipment plate of the camera. The offset error induced in this type of camera by the video voltage applied is corrected in real time, together with the errors of sensitivity and the errors due to the distribution of light along a line.