遥感图象的获得手段是多样的.除了直接凭目视判读这些原始图象外,往往还对它们作某些加工,即进行图象处理. 应该着重指出,所谓图象处理。只能根据需要对图象原来包含的信息作某种加工,决不能增加任何有用信息.实际处理方法常视具体的目的和任务而定.例如,为了显示原有图象的细 Remote sensing images are acquired in a variety of ways, and in addition to direct visual interpretation of these original images, they are often manipulated to perform image processing, emphasizing the so-called image processing. The image can only be processed according to the needs of the original information contained in some processing, must not add any useful information. The actual approach often depends on the specific purpose and task .For example, in order to display the original image of the fine