摘要
为解决海量影像数据在不同硬件设备上的快速调度与可视化,在保证遥感影像数据精度的前提下,通过设计合理的影像数据结构,构建了紧凑性影像金字塔数据库,并进一步运用JPEG2000算法对影像金字塔的瓦片数据进行有效压缩,减少了数据存储空间,提高了数据传输效率。将影像快速索引定位、双缓存、固定大小的内存置换等多种技术手段相结合,建立LRU(Least Recently Used)队列,改进了影像数据可视化的显示速度和效果。选取长江流域内的多幅航拍影像为例进行金字塔构建,应用所提出的方法在PC机、PDA等硬件上实现了影像的快速浏览与模拟。
To solve quick access and visualization of massive image data on different hardware devices, under the premise of ensuring accuracy of remote sensing data, a compact pyramid image database is established by designing a reasonable image data structure. By making use of JPEG 2000 algorithm, we compress the pyramid image tile data, thus reducing data storage space and improving data transmission efficiency. Moreover, fast image - locating based on index, double - buffering, fixed - size memory replacement and other technical methods are integrated to establish LRU （ Least Recently Used） queue, which can en- hance the speed and effectiveness of image data visualization. We build pyramid image for several aerial images in the Yangtze River Basin by the presented method, and their fast browsing and simulation are realized in the PC, PDA and other hardware en- vironment.
出处
《人民长江》
北大核心
2013年第23期82-85,共4页
Yangtze River
基金
国家"十二五"科技支撑计划项目(2011BAB10B07)
水利部公益行业科研专项"汉江流域水资源统一调度研究"(201101002)
关键词
影像数据结构
影像金字塔数据库
数据压缩
快速索引定位
双缓存
内存置换
image data structure
pyramid image database
data compression
fast index - locating
double - buffering
mem- ory replacement
