| 李永昌,路朋罗,金龙旭,李国宁,武奕楠,张宇,韩 双丽.大视场TDICCD空间相机全通道高可靠快视系统[J].光电子激光,2015,26(2):224~232 |
| 大视场TDICCD空间相机全通道高可靠快视系统 |
| A full channel and high-reliability quick-look system for TDICCD space camera with large field of view |
| 投稿时间：2014-09-15 |
| DOI： |
| 中文关键词: 空间相机 快视系统 硬件滚屏显示 (16,6)纠错算法 |
| 英文关键词:space camera quick-look system hardware-based scrolling display (16,6) er ror correction algorithm |
| 基金项目:国家“863”计划(863-2-5-1-13B)和吉林省科技发展计划(20126016)资助项目 (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.中国科学院大 学,北京 100039) |
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| 中文摘要: |
| 提出了一种适于大视场时间延迟积分电荷耦合器件 (TDICCD)空间相机的全通道高可靠快视系统。首先,建立TDICCD图像滚屏显示模型,能够有 效模拟TDICCD相机线阵输出的推扫过程,进而提出基于硬件的行频 自适应实时滚屏显示方法；然 后,针对高速图像数据缓存不可靠问题,提出易于硬件实现的(16,6)纠错编码算法； 最后,在某空间相机原理样机上进行了测试。结果表明,本系统的行频自适应范围为 0.52～7.68kHz,可对数据率 高达13.02Gbit/s的80通道12bit量化图像进 行实时滚屏拼接显示与缩略显示,图像细节表现能力强；加入(16,6)纠错编码算 法的SRAM缓存在1024Byte内可纠正82bit错误,提高了图像缓存的可靠性。系统工作稳定,可移植性强,已成 功应用于大视 场TDICCD空间相机的研制与检测中。 |
| 英文摘要: |
| A full-channel and high-reliability quick-look system suitable for large field TDICCD space camera is proposed.Firstly, a TDICCD remote sensing image scrolling display model is established and a hardw are-based real-time scrolling display method with row frequency adaption function is presented according to the theory that scroll ing display can effectively simulate the pushing progress of TDICCD cameras linear array output.Then,to overcome the unreliable problem of high speed image data cache,a (16,6) error correction coding algorithm which is easy for hardware implementation is p roposed and its principal as well as its algorithmic thought is explained.Finally,the proposed system is tested on a large field TD ICCD space camera prototype.Experimental results show that its adaptive row frequency range is 0.52－7.68kHz.Meanwhile,it ca n realize the scrolling mosaic display and thumbnail display for all 80channels and 12quantized images with a total data transfer rate up to 13.02Gbit/s.Also,the proposed system has strong ability of image detail performance.SRAM cache applied with (16,6) error correction coding algorithm is able to correct 82bit errors in 1024byte,which improves the image cache rel iability.Overall,the system is stable and reliable with strong portability,and has been successfully used to develop and test the large field TDICCD space camera. |
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