Hi, while color transforming a Quickbird image from RGB to HSV I experience that the values of Hue are in the range of of e.g. 319.0018... When I later create a color transformed image from HSV to RGB, using hue and saturation from the multispectral image and Val from the panchromatic image, to do a panchromatic sharpening, then it doesn't work in some areas, in others it works just fine. On the other hand, if I convert from RGB to HSV before I resize the image to fit the resolution of the panchromatic channel then I do not have the issue! What I did before doing the color transformation was to resize the multispectral channels to fit the spatial resolution of the panchromatic channel. I'm running ENVI 4.8 Classic. Cheers Thomas