摘要
文章研究高速CCD遥感图像压缩的系统设计与实现。与其它图像数据相比,CCD遥感图像数据具有高速率、高量化位数的特点。针对CCD相机输出图像的数据特点,基于ADV212压缩芯片,提出了一种高速CCD遥感图像压缩系统的构架方案。该方案采用FPGA+ADV212+SRAM的硬件结构方式,以FPGA作为系统的主控,SRAM完成输入数据的缓存处理,ADV212完成图像数据的高效压缩处理。文章最后构建了压缩系统的实验验证平台,对系统的性能进行了实验验证。试验结果表明,文中提出的系统压缩方案,压缩前后图像品质没有明显差异,可以满足遥感图像压缩系统的实时处理要求。
This paper focuses on the issue of CCD remote sensing image compression. Compared with other images, CCD remote sensing image data is characterized with high speed and high quantized bits. A high speed CCD image compression system is proposed based on ADV212 chip. The system is mainly composed of three devices： FPGA, SRAM and ADV212. In this system, the SRAM plays the role of data buffer, the ADV212 focuses on data compression and the FPGA is used for image storage and interface bus control. Finally, a system platform is designed to test the performance of compression. Test results show that the proposed scheme can satisfy the real-time processing requirement and there is no compressed image in respect of image quality. obvious difference between the sourced image and the
出处
《航天返回与遥感》
2012年第5期55-61,共7页
Spacecraft Recovery & Remote Sensing
