说明：  数字图像的显示 图像的彩色合成 图像拉伸 用于改善图像的对比度，突出感兴趣的地物信息，提高图像目视解译效果的图像处理方法。
(Color composite image of the display image of the digital image stretching is used to improve the contrast of the image, to highlight the feature of interest information, to improve image visual interpretation of the effect of the image processing method.)