陀螺去噪算法对航空相机像移补偿系统的影响  

Effects of gyro de-noising algorithm on aerial camera motion compensation system

作　　者：王德江[1,2] 张涛[1] 

机构地区：[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]中国科学院研究生院,北京100039

出　　处：《红外与激光工程》2010年第5期967-971,978,共6页Infrared and Laser Engineering

基　　金：国家高技术研究发展计划资助项目(2006AA06A208);中国科学院知识创新领域前沿项目(070Y32R070)

摘　　要：以某航空相机为研究对象,首先给出了像移与图像分辨率之间的关系,接着对TDI航空相机像移补偿系统工作原理进行了阐述,并以QRS14、ADIS16251陀螺为例分析了噪声对像移补偿系统的影响,然后分别阐述了模拟滤波方法、经典的数字无限冲击响应与有限冲击响应滤波法以及小波去噪算法对陀螺相位的影响,给出了模拟滤波器零极点,数字器阶数与相位延迟之间的关系式,最后分析比较了各种滤波算法的优劣与使用条件。结果表明:正确选择陀螺滤波算法对航空相机像移补偿精度与系统稳定性具有重要影响。For a specific practical aerial camera,relationship between image motion and image resolution was presented and operation principle of image motion compensation system of time delay integration（TDI） aerial camera was analyzed.Taking QRS14 and ADIS16251 as example,the effects of the two gyro′s noise on motion compensation system were analyzed.Then the effects of analog filter,digital infinite impulse filter（IIR）,finite impulse filter（FIR） and modern wavelet de-noising algorithms on the filtering performance and the phase delay were discussed respectively.The relational expressions among zero-pole of analog filter,taps of digital filter and phase delay were presented.Multi de-noise filtering algorithms were compared and their specific application conditions were proposed.Experiments indicate that the appropriate de-noising algorithms play a key role in aerial camera motion compensation system,and it could improve system stability greatly.

关 键 词：航空相机 像移补偿 去噪算法 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]