Circuit arrangement for a pixel-by-pixel correction of the picture signals of a picture sensor comprising a plurality of photoelements

摘要

Circuit arrangement for a pixel-by-pixel correction of the picture signals of a picture sensor comprising a plurality of photoelements. In a correction-value memory there are stored for each photosensor a plurality of correction brightness values, which are assigned to different grey values or raw brightness values and the respective magnitude of which is chosen such that a family of identical characteristic curves is obtained for all the photosensors for the relationship between photoelectric current and light intensity according to the function I = Io + a . L, where I denotes the photoelectric current, Io denotes the dark current, L denotes the light intensity and a denotes a constant. IMAGE