光学学报, 2014, 34 (12): 1212002, 网络出版: 2014-10-08   

基于空间相机TDI传感器重叠区图像的像移测量方法中的多解性研究

Research on Multiplicity of Solution in Space Camera Image Motion Measurement Based on Images from TDI Sensor Overlapped Area
作者单位
1 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
2 中国科学院大学, 北京 100049
摘要
针对基于时间延迟积分(TDI)传感器重叠区图像的像移测量方法的多解性问题,提出了以光滑性评价函数最小值为像移解的多解去除方法。根据像移测量原理,探析了像移测量方法的多解性;新增了光滑性评价函数,评价像移曲线的光滑性;以共轭梯度法求解的光滑性评价函数的最小解为像移解,实现从多个伪解中提取真实解;实验结果表明像移测量结果唯一,且测量误差为0.13 pixel,证明了以光滑性评价函数最小值为像移解的多解去除法的有效性。
Abstract
The multiplicity of solution in image motion estimation method based on images captured by overlapping time delay integration (TDI) imaging sensors is addressed, and a method to eliminate the multiplicity of solution by taking the optimum of smoothness evaluation function as the only solution of image motion is proposed. The existence of the multiplicity of solution is analyzed. An evaluation function is proposed to evaluate the smoothness of each solution, and the minimized evaluation function is taken as the optimal solution of image motion. The optimum is found by using the conjugate gradient method (CGM). A single-solution result is obtained with an error of 0.13 pixel, showing that the added smoothness evaluation function is feasible to solve the problem of multiplicity of solution in image motion measurement.
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刘海秋, 王栋, 徐抒岩. 基于空间相机TDI传感器重叠区图像的像移测量方法中的多解性研究[J]. 光学学报, 2014, 34(12): 1212002. Liu Haiqiu, Wang Dong, Xu Shuyan. Research on Multiplicity of Solution in Space Camera Image Motion Measurement Based on Images from TDI Sensor Overlapped Area[J]. Acta Optica Sinica, 2014, 34(12): 1212002.

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