半导体光电, 2011, 32 (3): 417, 网络出版: 2012-01-04
面阵CCD航测相机像移补偿技术研究
Research on Image Motion Compensation of Airborne Camera of Focal Plane CCD
面阵CCD 航测相机 像移 像移补偿 残差 坐标变换 focal plane CCD airborne camera image motion image motion compensation residual error coordinates transformation
摘要
航空相机在拍照瞬间由于飞机的飞行运动和姿态变化而产生像移,要提高照相分辨率必须通过像移补偿来实现。 采用在相机与飞机间增设三轴稳定平台的机械式像移补偿法来补偿姿态像移和前向像移,三轴稳定平台的三轴按照与飞机姿态变化角速率相等、方向相反进行旋转补偿姿态像移,三轴稳定平台的俯仰轴以飞行方向反方向、角速率等于速高比旋转补偿前向像移,并采用坐标变换法计算像移补偿后的残差,通过分析面阵CCD 相机像面各点在进行像移补偿后的像移残差均小于1/3 像元,符合成像要求。
Abstract
To improve the imaging quality and the image resolution of airborne cameras, it is necessary to compensate the image motion (IM) emerging in photographing. Threeaxis stable platform is assembled between the camera system and the unmanned aircraft, and the IM caused by the variation of the airplane gesture angles including pitching angle, yawing angle and rolling angle can be compensated by the reverse rotation of the stable platform in corresponding axis. The residual errors of the IM after compensation are analyzed and calculated in detail. The analysis results show that the residual errors of the image points are less than one third of the diameter of CCD pixel, which satisfies the imaging system.
任航, 袁红艳. 面阵CCD航测相机像移补偿技术研究[J]. 半导体光电, 2011, 32(3): 417. REN Hang, YUAN Hongyan. Research on Image Motion Compensation of Airborne Camera of Focal Plane CCD[J]. Semiconductor Optoelectronics, 2011, 32(3): 417.