Dear all, I am a new user in ENVI user forum. Currently I am using ENVI PPI toolbox for Spectral Mixture Analysis of Landsat data. During wirk, I found that after getting the PPI value,if I choose the Histogram Stretching from PPI Image Window, the output histogram shows the PPI value with the total number of pixels having that PPI value. I want to get the PPI value for each pixel of the image in a histogram. It will be really appreciated if anyone can suggest me how do I get it. Waiting for the kind reply . Regards Chandrama PhD student of UNSW@ADFA