一种影像快速加载及显示策略

Strategy of Image Rapid Loading and Display

目前普遍采用构建影像金字塔存储模型来解决遥感影像数据的加载及显示时存在的问题,但仅使用构建金字塔模型的策略在效率及系统鲁棒性等方面存在着诸多不足。结合影像动态提取技术和影像金字塔技术提出了一种灵活高效的影像加载及显示策略,充分利用系统内存空间,减少不必要的I/O操作,在保证系统性能的前提下大大提升影像加载与显示的用户体验。最后,利用C#语言开发程序Fload实现该策略,并与ESRI公司的ArcMap软件在执行效率、程序性能等方面进行了综合比较。结果表明,该影像加载及显示策略在性能上表现良好。

At present image pyramids were built widely to solve some problems emerged in the process of remote sensing image data loading and display. However, only using the strategy with pyramids model was deficient in the efficiency, system robustness, and so on. This paper proposed a flexible and efficient image loading and display strategy with image dynamic extraction technology and image pyramid technolo- gy, by which the system memory space was be used fully, unnecessary I /O operations were reduced, user experience of image loading and displaying with good system performance was improved greatly. Based on the comprehensive comparison of execution efficiency and program performance between the ES- RI＇s ArcMap software and FLoad, a program with C # language implementing the proposed strategy, the result was found that the proposed strategy achieved a good performance.