Hi, I have a serie of jpg images on which i would like to apply various directional filter. So I used Envi to try various options, All worked fine. Now my problem is i have undred of images, and I would like for convinience and efficiency to write a code to do it. so question1: is anyone aware of an ENVI_doit function to call the ENVI directional filtering function from IDL? cause I looked a bit but could not find anything.. question 2: i used David Fanning SHARPEN function, which worked fine, for a laplacian filter. however rather than having the sharpened result i would like to keep the actual image filter result. does anyone knows how to do that? question3: I also tryed the IDL CONVOL function, which kind of worked, however i do not manage to get the same kind of output that ENVI would give me with the same Kernel. Some advices on that one would be much appreciated. Hope i will find help here, i am kind of stuck. all the best, Yoann