【摘要】 针对多CCD拼接技术中照度不均匀性进行分析计算，给出照度理论曲线，论述了从结构和视频信号放大两个方面对照度进行补偿的方法．更多还原

【Abstract】 For the CCD-camera system,its resolution is mainly decided by the size of CCD-pixels and the pixel number of a single CCD chip. To improve the resolution,multi-CCD assembly technique is used. In this application,variation of illuminance is a factor affecting the system precision,and is also make it difficult to decide the threshold of image binarization. We calculate the illuminance of a 4-CCD assembly camera with the resolution 27. 61p/mm in this paper. Two methods to compensate it is advanced and discussed here.更多还原