ABSTRACT
Humans have a finely tuned ability to tell when the color of skin tone is off. Healthy skin lines up right on the skin tone line. Even though it is a very small bit past the skin tone vector, the shift is dramatically noticeable on the face. This is true across races and ages; human skin tone tends to fall along a very narrow line of hue, despite various levels of saturation, and that line of hue is recognized by most people. “Day for night” is a cinematography technique where night exterior sequences are shot in the daytime. The creation of a good day for night in post-production typically involves a combination of heavy vignetting to bring down the brightness of the sky or even digitally replacing the sky with a matte painting or plate, along with overall darkening and desaturation of the entire image.
