Patent ID: 8497900
Filing Date: 2013-07-30
Classification: H04N

Abstract:
1. A film scanner for the optical scanning of a motion picture film which has a sequence of a plurality of image regions and at least one row of a plurality of perforation holes in the longitudinal direction, in particular a motion picture film of the type 16 mm or 35 mm, having an image sensor for the detection at least of a respective image region of the motion picture film to generate a corresponding scanned image; and having an evaluation unit for the evaluation of the scanned image to generate an image steadiness correction signal for the scanned image, characterized in that the image sensor is made for the additional detection of only a respective part region of perforation holes in the environment of the detected image region of the motion picture film, with the evaluation unit being made to determine a position of the detected part region of at least one perforation hole and to generate the image steadiness correction signal on the basis of the at least one determined part region position, and the evaluation unit is made for the determination of the area and of the periphery of the detected part region of the at least one perforation hole, with a lookup table being stored in the evaluation unit, with a desired value of the periphery of the detected part region being associated with a respective value of the area in said look-up table, with the evaluation unit being made for the determination of a deviation of the determined periphery from the associated desired value, and with the evaluation unit being made to leave a determined position of the detected part region of the respective perforation hole out of consideration with respect to the generation of the image steadiness correction signal if the determined deviation of the periphery exceeds a limit value for this determined part region position.