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网络下遥感影像实时压缩及渐进传输系统设计

DOI: 10.3969/j.issn.1006-7043.201307028

Keywords: 图像压缩, 渐进传输系统, 实时压缩, 实时系统, 遥感影像, 瓦片

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Abstract:

为了使遥感影像在虚拟地球平台快速、平滑地发布,提出了一个实时压缩及渐进传输系统。论证了金字塔模型中最佳瓦片大小,对客户端请求区域的每个瓦片,服务器采用SPIHT算法进行实时压缩,码流每达到一定长度则立即打包发送,同时压缩继续进行。客户端每收到一个包则立即解压,并对已显示图像动态更新。实验结果表明:该系统能够实现压缩、传输、解压、显示同步进行,客户端看到的图像能够快速平滑过渡至最清晰,克服了传统方法中图像"阶跃"显示的问题。

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