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Skin tone optimization method and device for color gamut transformation system

A color gamut conversion and optimization technology, which is applied in the field of skin color optimization methods and devices of color gamut conversion systems, can solve the problems of no further processing of skin color, unnatural skin color, etc., so as to improve color saturation, maintain natural effect

Active Publication Date: 2013-08-14
ORISE TECHNOLOGY CO LTD
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Problems solved by technology

[0005] See U.S. Patent No. 7,986,833, which discloses a method and device for color enhancement and correction (Color Enhancement and correction), so as to prevent the phenomenon of clipping caused by excessive enhancement of color saturation, which also affects skin color. Without further processing, it will also face the problem of browned and unnatural skin color

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  • Skin tone optimization method and device for color gamut transformation system
  • Skin tone optimization method and device for color gamut transformation system
  • Skin tone optimization method and device for color gamut transformation system

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Embodiment Construction

[0026] figure 2 It is a schematic diagram of a skin color optimization device 200 of a color gamut conversion system of the present invention. The skin color optimization device 200 includes an RGB to HSV conversion unit 210 , a skin color optimization processing unit 220 , a color enhancement calculation unit 230 , and an HSV to RGB conversion unit 240 .

[0027] The RGB-to-HSV conversion unit 210 receives an image signal, and converts the image signal from the RGB color gamut to the HSV color gamut to generate an HSV color gamut image signal.

[0028] There is a high correlation between each component in the RGB color space, while each component in the HSV color space is not correlated with each other. Compared with the RGB color space, the HSV color space is less susceptible to the influence of light, so it is necessary to convert the RGB color gamut to the HSV color gamut, which can reduce the impact of light on the image and avoid misjudgment. image 3 A schematic diag...

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Abstract

The invention provides a skin color optimization method and device for a color gamut transformation system. An RGB (Red Green Blue) to HSV (Hue, Saturation, Value) transformation unit receives a camera signal and transforms the camera signal from the RGB color gamut to the HSV color gamut so as to generate an HSV color gamut camera signal; a skin color optimization unit is connected with the RGB to HSV transformation unit and used for executing skin color optimization of the HSV color gamut camera signal so as to generate a hue / saturation gain; a color enhancement operation unit is connected with the skin color optimization unit and used for executing color enhancement operation of the HSV color gamut camera signal according to the hue / saturation gain and a hue displacement signal so as to generate a color enhancement camera signal; and an HSV to RGB transformation unit is used for transforming the color enhancement camera signal from the HSV color gamut to the RGB color gamut.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a skin color optimization method and device for a color gamut conversion system. Background technique [0002] figure 1 is a schematic diagram of a conventional color enhancement system 100 . The color enhancement system 100 is composed of an RGB-to-HSV conversion unit 110 , a color enhancement unit 120 , and an HSV-to-RGB conversion unit 130 . The RGB-to-HSV conversion unit 110 first converts the pixels of the input image signal from the RGB color gamut to the HSV color gamut. The color enhancement unit 120 uses the gain signal S_gain(H) to enhance the color saturation of the image signal, and uses the hue adjustment signal H_shift(H) to adjust the hue of the image signal. Finally, the HSV-to-RGB conversion unit 130 converts the image signal from the HSV color gamut to the RGB color gamut. However, while the conventional color enhancement system 100 utilizes the gai...

Claims

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Application Information

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IPC IPC(8): H04N1/62H04N1/60
Inventor 吴鸿居林展瑞
Owner ORISE TECHNOLOGY CO LTD
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