一种变化检测的新算法

变化检测技术是遥感图像应用中的关键技术之一。在分析变化检测算法的基础上，提出了一种新的变化检测算法，该算法主要由三步组成：差图像的优化获取、变化区域的准确检测、目标阴影的修正。仿真结果表明了本文所提算法对变化目标的检测准确可靠，且对背景有较强的鲁棒性。

A New Algorithm for Change Detection

Change detection was one of pivotal technologies for the application of remote sensing image. On the basis of analysis for algorithms for change detection, A new algorithm was proposed in this paper, the algorithm consists of three steps: optimized acquiring for difference image based on blocking by using wavelet transform; exact detection of change area by using self-adaptive threshold; correcting change detection result through detecting objects' shadow. A number of simulation results show that new algorithm can detect effectively change areas, and outlines of change objects are incarnated perfectly simultaneously. The algorithm has better robustress against background.