Extraction Method of Alteration Anomalies Based on ERDAS
基于ERDAS的蚀变遥感异常提取方法

For many kinds of distances,remote sensing anomalies usually exist in some weak information.The various changes of the spectrum curve and the multi-value and uncertainty of the image characters of the geologic bodies increase the difficulty in extracting the weak information,however,there must be some differences between the information and other things around it in spectrum.Meanwhile,with the increasing of the remote sensing resolution as well as the development of the technology in image progress,it is possible to extract the anomaly information.The paper introduces the method and process using the functions of image management and spatial modeling in ERDAS IMAGINE based on the mature methods for the extraction of geological information and has been applied in Xinjiang.This approach afforded a simple and convenient way for the extraction of alteration anomalies.