基于ISODATA算法的城市变化检测

摘要

为验证ISODATA分类算法在变化检测中的可行性,利用人为对宜昌市TM影像加入改变的影像和原始图像,对比像素差值法进行ISODATA分类检测.然后利用武汉市多时相遥感影像,进行像素差值法、ISODATA分类算法的变化检测,以对城市的变化进行分析.实验结果表明,2种检测方法结果差别不大,但ISODATA算法有其优越性,证明ISODATA算法在变化检测中有一定的可行性.%In order to explore the feasibility of ISODATA algorithm in change detection, using ISODATA algorithm to process the artificial modification of Landsat TM imagery of Yichang and original one compared with image subtracting operation. To obtain the change information of Wuhan by utilizing the method of image subtracting operation and ISODATA algorithm between multi-temporal images. The results of two methods have a few differences, and ISODATA algorithm has its advantages, thus, the feasibility of ISODATA algorithm in change detection is proved.