Xe847 is a very complex nonlinear professional-quality technology. It reduces color-shifts from ambient light or bad camera white balance, corrects contrast, brightness, gamma and gradation curves in a complex non-linear way, applies global and selective color corrections and makes blue sky, foliage and skin-tones look more natural. The "Pro" version gives you much more control. You get three controls that let you change color constancy correction, Brightness/Contrast and color temperature. The "ProPlus" version goes even further and offers an additional selective color correction plus is able to process 16bit images. By clicking into the image and moving the mouse you can easily change all color tones similar to the one under the mouse pointer.