Perceptual picture quality improvement for power saving
One embodiment provides a computer-implemented method that includes increasing a chroma of one or more particular hues of an image for display on a display device. The one or more particular hues having at least a threshold magnitude of a visual perception effect based on a contrast between one or more colors and a background color. Perceptual brightness of the image is increased without changing actual brightness of the image. A lightness of at least one of two particular hues is reduced, by a specified amount, to increase global contrast between various hues.
1 . A computer-implemented method comprising:
increasing a chroma of one or more particular hues of an image for display on a display device, the one or more particular hues having at least a threshold magnitude of a visual perception effect based on a contrast between one or more colors and a background color;
increasing perceptual brightness of the image without changing actual brightness of the image; and
reducing, by a specified amount, a lightness of at least one of two particular hues to increase global contrast between various hues;
wherein one or more radial weighting functions are used to adjust saturation and lightness of the image.
2 . The method of claim 1 , wherein the two particular hues to increase the global contrast are red and yellow.
3 . The method of claim 1 , wherein the visual perception effect is a Helmholtz-Kohlrausch (HK) effect.
4 . The method of claim 3 , wherein the one or more particular hues having at least the threshold magnitude of HK effect include at least one of magenta, violet or blue.
5 . The method of claim 1 , wherein the one or more radial weighting functions are based on at least one of hue or the saturation.
6 . The method of claim 1 , wherein reducing the lightness of the at least one of two particular hues saves power consumption of the display device.
7 . The method of claim 1 , wherein picture quality for the display device is improved at a same time power consumption is preserved or reduced.
8 . A non-transitory processor-readable medium that includes a program that when executed by a processor provides increasing global contrast between various hues, comprising:
increasing, by the processor, a chroma of one or more particular hues of an image for display on a display device, the one or more particular hues having at least a threshold magnitude of a visual perception effect based on a contrast between one or more colors and a background color;
increasing, by the processor, perceptual brightness of the image without changing actual brightness of the image; and
reducing, by the processor, by a specified amount, a lightness of at least one of two particular hues to increase global contrast between various hues;
wherein one or more radial weighting functions are used to adjust saturation and lightness of the image.
9 . The non-transitory processor-readable medium of claim 8 , wherein the two particular hues to increase the global contrast are red and yellow.
10 . The non-transitory processor-readable medium of claim 8 , wherein the visual perception effect is a Helmholtz-Kohlrausch (HK) effect.
11 . The non-transitory processor-readable medium of claim 10 , wherein the one or more particular hues having at least the threshold magnitude of HK effect include at least one of magenta, violet or blue.
12 . The non-transitory processor-readable medium of claim 8 , wherein the one or more radial weighting functions are based on at least one of hue or the saturation.
13 . The non-transitory processor-readable medium of claim 8 , wherein reducing the lightness of the at least one of two particular hues saves power consumption of the display device.
14 . The non-transitory processor-readable medium of claim 8 , wherein picture quality for the display device is improved at a same time power consumption is preserved or reduced.
15 . An apparatus comprising:
a memory storing instructions; and
at least one processor executes the instructions including a process configured to:
increase a chroma of one or more particular hues of an image for display on a display device, the one or more particular hues having at least a threshold magnitude of a visual perception effect based on a contrast between one or more colors and a background color;
increase perceptual brightness of the image without changing actual brightness of the image; and
reduce, by a specified amount, a lightness of at least one of two particular hues to increase global contrast between various hues;
wherein one or more radial weighting functions are used to adjust saturation and lightness of the image.
16 . The apparatus of claim 15 , wherein the two particular hues to increase the global contrast are red and yellow.
17 . The apparatus of claim 15 , wherein the visual perception effect is a Helmholtz-Kohlrausch (HK) effect.
18 . The apparatus of claim 17 , wherein the one or more particular hues having at least the threshold magnitude of HK effect include at least one of magenta, violet or blue.
19 . The apparatus of claim 15 , wherein the one or more radial weighting functions are based on at least one of hue or the saturation.
20 . The apparatus of claim 15 , wherein:
reducing a lightness of the at least one of two particular hues saves power consumption of the display device; and
picture quality for the display device is improved at a same time power consumption is preserved or reduced.