公开(公告)号：US4912558A

公开(公告)日：1990-03-27

申请号：US290729

申请日：1988-12-27

申请人： Robert W. Easterly ,  John R. Fredlund ,  Anthony W. Schrock ,  Lawrence E. Walther

发明人： Robert W. Easterly ,  John R. Fredlund ,  Anthony W. Schrock ,  Lawrence E. Walther

IPC分类号： H04N1/40 ,  H04N1/407

CPC分类号： H04N1/4076 ,  H04N1/40056

摘要： The translation of an optical image into video signals by a video sensor illuminated by the optical image is adjusted by illuminating the sensor at a first level of light intensity sufficient to provide the video signals at maximum amplitude while adjusting the amplitude of the video signals to a first level, and then illuminating the sensor at a second reduced level of light intensity while adjusting the black level of the video signals so that the black level is at least equal to the amplitude of the signals produced by the sensor in the absence of illumination.

摘要翻译： 通过由光学图像照亮的视频传感器将光学图像转换为视频信号通过以足以在最大幅度提供视频信号的第一光强度照射传感器来调节，同时将视频信号的幅度调整为 第一级，然后在调节视频信号的黑电平的同时以第二降低的光强度照亮传感器，使得黑电平至少等于在不存在照明的情况下由传感器产生的信号的幅度。