针对航测高分辨率CCD巨量压缩视频数据的存取,提出了一种基于文件结构的快速存取系统方案,并给出了该方案在实际存储器中的实现结构.该存取系统主要由图像基本信息和详细信息组成.图像基本信息包括帧号、缩略图、编码长度和地址.通过图像帧号获得图像的基本信息,实现快速浏览；并可进一步读取任意帧图像的详细编码信息.同时,构造了基于小波变换的缩略图方法,并通过对相关存取结构的设计,给出了整个存取系统在存储器中的实现,通过对该系统的研究,可高效快捷地实现对任意帧图像数据的快速存取和查找,大大提高了工作效率.
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