Image irradiation correcting system based on color domain mapping

A lighting correction and color gamut mapping technology is applied in the field of image lighting correction systems based on color gamut mapping to achieve the effects of improving image contrast and increasing noise.

Inactive Publication Date: 2009-07-08
SICHUAN PANOVASIC TECH
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Problems solved by technology

[0016] The purpose of the present invention is to overcome the deficiencies of the existing image illumination correction methods, and provide an image illumination correction based on color gamut mapping that can well maintain the original image color without increasing image noise, and can process images containing high light and dark light system

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  • Image irradiation correcting system based on color domain mapping
  • Image irradiation correcting system based on color domain mapping
  • Image irradiation correcting system based on color domain mapping

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[0027] In order to better understand the present invention, the present invention will be described in more detail below in conjunction with specific embodiments. In the following description, when detailed descriptions of existing prior art may obscure the subject matter of the present invention, such descriptions will be omitted here.

[0028] figure 1 It is a block diagram of a specific embodiment of the image illumination correction system of the present invention. In this embodiment, after the input image 101 enters the illumination correction system, the input image 101 is firstly decomposed into the R channel signal 103, the G channel signal 104 and the B channel signal 105 in the color decomposition module 102 according to the color channels; Carry out image brightness calculation by brightness calculation module 106, obtain brightness signal I 115; Adjust and calculate brightness signal I 115 by brightness adjustment calculation module 116, obtain adjusted new bright...

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Abstract

The present invention discloses an image illumination correcting system based on color gamut mapping. The brightness signal of input image and R, G, B signals after color space decomposition are separated and processed. Then, the brightness value of brightness signal obtained by brightness adjustment is multiplied by the R separation color signal, G separation color signal and B separation color signal after color space decomposition for recovering and obtaining image after illumination correction. The novel color space decomposition and brightness adjusting can better retain the color of original image while the picture contrast is increased and the noise of image is not increased. Simultaneously, the illumination correcting system adopted by the invention strengthens the dark-light part and suppresses the high-light part in a brightness adjusting calculating module. The image containing high-light and dark-light can be processed.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image illumination correction system based on color gamut mapping that processes image color correction and enhancement under bright and dark scene illumination. Background technique [0002] Many image and video acquisition devices, such as digital cameras, video cameras, etc., when collecting image signals, because the image is formed by the reflection of light, there is often a phenomenon that the light source is not evenly illuminated on the scene, so that the part with strong light Brighter, the part with weak light is darker, resulting in uneven lighting of the environment, or the light is darker, or the light is brighter. [0003] In order to avoid this phenomenon of darker or brighter light, it can be compensated by adjusting the exposure time. However, the existing image signal acquisition equipment can only obtain one exposure time each time for the...

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Application Information

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IPC IPC(8): H04N9/77
Inventor 吴亚东袁梓瑾李慧然
Owner SICHUAN PANOVASIC TECH
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