Hi-- First of all, wondering how to create an albedo image from Quickbird Imagery?  I believe it's the square root of the sum of squares of all bands, but I thought this was supposed to be a value between 0 and 1?  Thanks Also, I've been reading up on how to remove shade/shadow from images using endmembers--but as I'm a novice to all this I find it fairly confusing.  I'm starting to grasp it theoretically, but could I get some advice as to how do manage this in ENVI? Thanks! Steve