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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(16,16)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(16,16)纠错编码算法的SRAM缓存在1 024Byte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。
A full-channel, high-reliability and fast-vision system for large-field time-delay integrated charge-coupled device (TDICCD) space camera is proposed. First of all, the TDCDCD image scrolling display model is established, which can effectively simulate the scalping process of TDICCD camera array output. Then a hardware-based real-time scrolling display method of line frequency adaptive is proposed. Then, according to the unreliable problem of high speed image data caching, (16,16) error correction coding algorithm; Finally, a space camera principle prototype was tested. The experimental results show that the adaptive frequency range of the system is 0.52 ~ 7.68kHz, which can display the real-time scrolling images and the thumbnail images of 80-channel 12bit data with the data rate up to 13.02Gbit / s. 16,16) Error Correction Coding SRAM buffer can correct 82bit error within 1024Byte, which improves the reliability of image buffer. System stability, portability, has been successfully applied to large field TDICCD space camera development and testing.