光学精密工程2012，Vol.20Issue(7)：1559-1565,7.DOI:10.3788/OPE.20122007.1559
利用CCD拼接实现推扫式遥感相机的自动调焦
Realization of auto-focus on APRC using CCD stitching
摘要
Abstract
According to the stitching structure of CCDs in an Aerial Push-broom Remote-sensing Camera (APRC), an auto-focus method by using the image from the CCD overlapped sections was proposed. Firstly, the structure of CCD in the APRC was introduced. Based on the pushing-broom imaging characteristics, a Field Programming Gate Array (FPGA) which can process data in parallel model was used to receive the image data from multi-CCD overlapped sections and calculate the evaluation values of image quality at the same time. Then, three kinds of the CCD overlapped sections with the biggest evaluation values of image quality were selected as the gist for determining the focus direction. Finally, the feasibility of the method proposed was validated by an experiment. In the experiment, when the push-broom frequency is 10 kHz, the time for one focus step is 0. 2 s, which illuminates that the proposed focusing method has good real-time ability, and it can offer a feasible gist for the on-track focus in the APRC.关键词
空间推扫式遥感相机/CCD拼接/自动调焦/现场可编程门阵列/并行处理Key words
Aerial Push-broom Remote-sensing Camera (APRC)/ CCD stitching/ auto-focus/ Field Programming Gate Array(FPGA)/ parallel process分类
航空航天引用本文复制引用
卢振华,郭永飞,李云飞,吕恒毅..利用CCD拼接实现推扫式遥感相机的自动调焦[J].光学精密工程,2012,20(7):1559-1565,7.基金项目
国家自然科学基金资助项目(No.61036015) （No.61036015）
