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Xe847 simulates the so called color-constancy of the human visual system: up to a certain degree, the human eye perceives the color of objects as constant even if the ambient light or the illuminant changes. Whether illuminated by direct sunlight or fluorescent lighting, human skin always looks natural. Xe847 was developed on the basis of physiological processes in the visual cortex of the brain as well as some higher psychological effects. Imagine a summer vacation scene at the beach. It may be warm and sunny, but a blue color shift from the blue sky produces a cold appearance on the photo. The warm atmosphere is not recorded correctly. Xe847 adjusts the output so that the memory is preserved accurately. 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. Xe847 is smart enough to acknowledge when the original data should not be altered. It is no problem to develop algorithms that correct color shifts, the problem is recognizing if there is a color shift at all. The other big challenge is to simulate how the human eye-brain would see that original data.

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