遥感卫星多谱段图像在轨压缩系统  

On-orbit Compression System for Multispectral Images of Remote Sensing Satellites

作　　者：刘静军 贺小军 闫磊 陆牧 LIU Jingjun;HE Xiaojun;YAN Lei;LU Mu(Changguang Satellite Technology Co.,Ltd.)

机构地区：[1]长光卫星技术股份有限公司

出　　处：《仪表技术与传感器》2025年第2期63-67,共5页Instrument Technique and Sensor

基　　金：吉林省科技发展计划产业关键核心技术攻关项目(20230201050GX)。

摘　　要：目前遥感卫星相机输出数据量大、谱段多,传统图像压缩方法已不适用,文中提出了遥感卫星多谱段图像在轨压缩系统的设计与实现方法。使用现场可编程门阵列作为主控器和6片ADV212专用压缩芯片完成多谱段遥感图像压缩,对原始图像数据进行预处理,应用乒乓操作和并行数据处理结合方式将数据传输至压缩芯片,使用动态随机存储器实现压缩后图像数据的缓存,将压缩包按顺序调度后通过高速串行接口回写给存储系统。通过试验,分析了典型场景下的图像压缩质量,确定了最优压缩参数,在压缩比为3条件下,峰值信噪比大于60 dB,设计满足卫星使用需求。At present,the remote sensing satellite camera outputs a large amount of data and has many spectral segments,and the traditional image compression method is no longer applicable,and the design and implementation method of the multispectral image on-orbit compression system of remote sensing satellite was proposed.Using the field programmable gate array as the pro-cessor and six ADV212 special compression chips to complete multispectral remote sensing image compression,the original image data was preprocessed,the combination of ping-pong operation and parallel data processing was applied to transmit data to the compression chip,the dynamic random access memory was used to realize the cache of the compressed image data,and the com-pressed packets were scheduled sequentially and written back to the storage system through high-speed serdes.Through experi-ments,the image compression quality in typical scenarios was analyzed,the optimal compression parameters were determined,and the peak signal-to-noise ratio is greater than 60 dB with compression ratio of 3,which is designed to meet the needs of satellite use.

关 键 词：图像预处理 ADV212 多谱段图像压缩 FPGA 

分 类 号：V474[航空宇航科学与技术—飞行器设计]