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    • 10. 发明申请
    • PROCESS AND DEVICE FOR THE AUTOMATIC CORRECTION OF GEOMETRY, SUPERPOSITION OF COLOURS AND UNIFORMITY OF IMAGE FOR A TELEVISION CAMERA
    • 自动校正几何图像的过程和设备,色彩的保护和电视摄像机的图像均匀性
    • WO1991011075A1
    • 1991-07-25
    • PCT/FR1991000022
    • 1991-01-14
    • THOMSON CONSUMER ELECTRONICSGUERIN, Jean-ClaudeMOREL Philippe
    • THOMSON CONSUMER ELECTRONICS
    • H04N09/093
    • H04N3/2335H04N3/23H04N5/217H04N9/093
    • According to the invention, the device for carrying out the process comprises on the one hand, a processor (2) connected by a data line (12) to a correction memory (3), a measuring circuit (9), and to a digital/analog converter (4), and on the other hand, an adder circuit connected to the output of the digital/analog converter (4) and to the output of the camera's scanning circuit in order to add to the saw tooth signal provided by the camera the correction values given by the correction memory in synchronism with the camera scanning. The correction values result from an evaluation of the position error of pattern centres of an optical test pattern restored by the camera and of their homologues in an electronic test pattern. Intermediate correction values are calculated for each pattern by interpolation of the position errors of the pattern centres by means of a third order interpolation polynomial. Application: high definition television.
    • 根据本发明,用于执行该处理的装置一方面包括通过数据线(12)连接到校正存储器(3)的处理器(2),测量电路(9)和数字 /模拟转换器(4),另一方面,连接到数/模转换器(4)的输出端和摄像机扫描电路的输出端的加法器电路,以增加由 相机与相机扫描同步摄像由校正存储器给出的校正值。 校正值由对电子测试图案中由照相机及其同系物恢复的光学测试图案的图案中心的位置误差的评估产生。 通过三阶插值多项式对图案中心的位置误差进行插值来计算每个图案的中间校正值。 应用:高清电视。