Photo Improvement

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Gray Balance
For some images, special lighting conditions (leading to undesirable color casts) mean that it is not possible to achieve satisfactory results using either the white balance or the color curves. This is where the gray balance can be useful. By setting four reference points the various color casts of the image are calculated according to preset gray values. The result is a curve which can be adjusted afterwards. However, it is usually sufficient just to set the reference points.

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