美国宇航局的源码，可以用来学习、借鉴.包含几十个模块如Image Manipulation 、Math and Statistics 、Plotting Procedures 、IDL Structure procedures 等等。-NAME:THE IDL ASTRONOMY USER S LIBRARY IDL PRO FROM NASA

idl计算roi内遥感图像的反射率的小程序-idl calculate the reflectivity of remote sensing image process

读取图像 \examples\data\convec.dat，并对它进行均值平滑（smooth 和median），另外利用Sobel和Roberts函数使用以下3*3的窗口对图像进行卷积。给出IDL编程代码及其运行结果。(The image \\examples\\data\\convec.dat is read, and its mean smoothing (smooth and median) is performed. In addition, Sobel and Roberts fun