Hello fellow ENVI users: I am hoping that somebody out there has used the Band Math function successfully. I am trying to calculate a vegetation index (b1 - b2)/(b1 + b2). ENVI happily chugged along and output an image, but the values are not what they should be: they should range from -1 to 1, but are ranging from 0 to 255 when I used the Cursor Location or Statistics function, which tells me that a stretch is being applied somewhere. I need the true unstretched data values, but can't find a way to view them, or calculate stats on them. Please reply if you know... Thanks, Karin