Method and device for reducing flicker for successive pixels of temporally alternating complementary colors

Abstract

A method and device allow to reduce the energy needed for rendering an image by replacing a pixel of the image by temporally successive pixels of alternating complementary colors requiring less energy for display and selected according to a polarity constraint. This solution is exploiting the flicker fusion characteristic of the human vision system which allows to select complementary colors that might visually have the same perceptual characteristics than a corresponding single color. The alternating complementary colors are selected to be more frugal in terms of energy consumption required for rendering the color. The replacement is performed either by frame doubling, by frame skipping or by frame averaging. The notion of successive pixels is temporal. In other words, when using frame doubling, one pixel is replaced by two temporally successive pixels of alternating complementary colors pixels, the replacement pixels having half duration. When using frame skipping or averaging, two temporally successive pixels are replaced by two temporally successive pixels of alternating complementary colors pixels, the replacement pixels having the same duration. The polarity constraint allows to reduce the perceived flicker. The association between a color and the corresponding alternating complementary colors can be obtained from a look-up table. These principles may be used on an image or a video comprising a succession of images.

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