I am a postdoctoral research fellow. IDL is very useful and good tool so that we can use IDL very often in oue research. In our research we often employ the function of image classification . It is expensive for us to buy a set of ENVI for the only one fucntion . We would like to konw whether you have IDL image classification model for download free of charge . or we can pay some for it. Thank you very much for your help.