基于图像金字塔的海量遥感图像快速视图

Xiyan Wei, Xin Lu, Hong Sun
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引用次数: 8

摘要

本文描述并实现了一种基于图像金字塔的海量遥感图像快速查看方案。该方案的关键技术是平铺、图像金字塔和缓存调度管理。该方案利用平铺技术突破了Windows进程内存的限制,提高了硬盘的I/O速度。建立了基于小波变换的图像金字塔,实现了图像的多分辨率显示。缓存调度管理用于减少图像加载的时间延迟。在拖动图像的情况下,查看器使用缓存中的现有磁贴来快速更新视图,并替换缓存中与更新后的视图相对应的磁贴。实验结果表明,该方案在快速处理海量图像时是有效的。
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Fast View of Mass Remote Sensing Images Based-on Image Pyramid
In this paper, a fast view scheme of mass remote sensing images based on image pyramid is described and implemented. The key techniques in this scheme are tiling, image pyramid, and cache scheduling management. This scheme employs tiling to break the limit of the Windows process memory and improve the I/O speed of hard disk. A wavelet based image pyramid is built for multi-resolution displaying. Cache scheduling management is used for reducing the time latency of image loading. In the case of dragging an image, the viewer uses the existing tile in cache to quickly update the view and replaces the tiles in cache corresponding to the updated view. The experiment results show that this scheme is effective in fast view of mass images.
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