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对深空探测光学自主导航中光学自主图像信息测量方法进行了研究。根据不同任务阶段中目标导航星成像特点,对远距离星图采用质心中心定位方法,对近距离所成的面目标用Otsu最大类间方差法自动分割,提取边缘闭区域轮廓,并用有效轮廓数据进行椭圆拟合计算出目标中心象素位置以获得视线角信息。实验结果表明:该光学自主导航图像信息测量方法有效。
The method of optical autonomous image information measurement in deep space exploration optical autonomous navigation was studied. According to the characteristics of target navigation star imaging in different mission phases, the centroid centering method is adopted for the long-distance star image and the Otsu maximum inter-class variance method is automatically used for the surface target formed by the short distance. The contour of the edge closed region is extracted and compared with the effective contour data Ellipse fitting is performed to calculate the target center pixel position to obtain line-of-sight information. The experimental results show that the optical autonomous navigation image information measurement method is effective.