光学精密工程2013，Vol.21Issue(2)：445-453,9.DOI:10.3788/OPE.20132102.0445
星上多通道遥感图像的实时合成压缩
Composition and compression of satellite multi-channel remote sensing images
摘要
Abstract
To improve the understable imaging system caused by the high work frequency of image composing circuit on a satellite, the structure of a camera was innovated. A composion and compression method of Time Delay Integration CCD(TDICCD) based on a Field Programming Gate Array (FP-GA) platform was proposed for satellite remote sensing data. The principle of real-time compostion and compression for multi-channel satellite remote sensing data was introduced. Then, based on the characteristics of TDICCD linear array push-broom imaging mode, the improved JPEG-LS was used. By taking adaptive quantization to control the coding rate dynamically, composion and compression of image data were simultaneously achieved on the FPGA. At last, an experiment platform was established for the validation. Experimental results indicate that the system clock has reduced to 80 MHz and 64 MHz, respectively, from the original 100 MHz in the lossless and 2-time compression and the Peak Signal Noise Ratio(Reconstruct PSNR) of the image is higher than 80 dB. As the proposed algorithm has low storage capacity, the average processing time of one line image is 57.5 μs, smaller than the smallest line period of the camera. The proposed algorithm is stable and the system is reliable and achieves the composion and compression of multi- channel TDICCD remote image within the camera.关键词
遥感图像/图像压缩/合成压缩/推扫式遥感相机/多通道时间延迟积分CCD/JPEG-LSKey words
remote-sensing image/ image compression/ composition and compression/ push-broom remote-sensing camera/ multi-channel Time Delay Integration(TDI)CCD/ JPEG-LS分类
信息技术与安全科学引用本文复制引用
刘春香,郭永飞,李宁,司国良,李云飞..星上多通道遥感图像的实时合成压缩[J].光学精密工程,2013,21(2):445-453,9.基金项目
国家自然科学基金资助项目(No.61036015) （No.61036015）
