利用高精度转台、单轴速率位置转台控制单元、双坐标自准值仪、平行光管、高亮度LED光源及星点板构建地面试验室测量系统进行测量空间CCD相机的测角精度.在数据与图像处理过程中,使用了暗电流定标去噪和将二维图像转换为一维的目标星点粗定位的预处理方法,并提出适用于本实验的星点细分定位算法.通过实际测量实验,测得的测角精度不高于0.2",证明了该地面测量方法的有效性和合理性.%A angular accuracy ground laboratory measurement system, which is composed of high- precision turntable, turntable position uniaxial rate stabilized control unit, two-dimension photoelectric autocollimator unit, collimator, high brightness LED light source and star point, is used to measure the angular accuracy of a spacial CCD camera. In data and image processing, an image preprocessing method eliminating the dark current is used to remove the noisy pixel and drop 2-d image to one-dimensional to find the coarse position of the star, as well as a star image subdivision localization algorithm which is suitable for this experiment. By a large number of step experiments, the angular accuracy can reach 0.2". Therefore, the validity and rationality of the proposed method is well confirmed.
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