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Video image processing method, device and equipment

A video image and original image technology, applied in the direction of color signal processing circuit, luminance and chrominance signal processing circuit, etc., can solve the problems of inability to automatically adjust the video image luminance and chrominance, poor adjustment effect, etc., and achieve better display effect. Better, less resource utilization, better adjustment effect

Active Publication Date: 2015-04-01
ZTE CORP
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  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a video image processing method, device, and equipment to solve the existing problems that the brightness and chromaticity of video images cannot be automatically adjusted, and the adjustment effect is not good

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  • Video image processing method, device and equipment
  • Video image processing method, device and equipment
  • Video image processing method, device and equipment

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Embodiment Construction

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] The method of adjusting chromaticity and brightness through the HIS model generally includes two steps:

[0034] Step 1. Enhance the chroma saturation S while enhancing the brightness contrast I.

[0035] Step 2. Enlarge the dynamic range of brightness contrast I, and also expand the dynamic range of color saturation S at the same time. Dynamic range stretching is stronger for images with lower brightness contrast, and vice versa.

[0036] In order to realize the automatic adjustment of the chroma saturation and brightness contrast of the video...

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Abstract

Disclosed in the present invention are a method, a device and an apparatus for processing video images. The method comprises: determining the average chrominance saturation and average luminance contrast of the original image according to luminance components and chrominance components of each pixel of an original image; comparing the determined average chrominance saturation with a set saturation enhancement threshold to determine the adjustment amount of the chrominance saturation, and comparing the determined average luminance contrast with a contrast enhancement threshold to determine the adjustment amount of the luminance contrast; according to the determined adjustment amount of the chrominance saturation, the determined adjustment amount of the luminance contrast and the set strength control parameter, generating a mapping table including the enhanced and adjusted luminance components and chrominance components of each pixel; and adjusting, according to the mapping table, the luminance and chrominance of each pixel of the original image to obtain a enhanced object image. The present invention can automatically adjust the chrominance saturation and luminance contrast of images according to the chrominance and luminance of the original image, thus obtaining a better video display effect.

Description

technical field [0001] The invention relates to the technical field of video image post-processing, in particular to a video image processing method, device and equipment. Background technique [0002] The HSI model is a visual color model that starts from the human visual system and uses hue (Hue), saturation (Saturation), and brightness (Intensity) to describe colors. From the perspective of the human eye, the display effect of the image mainly depends on the combined effect of chroma saturation and brightness contrast. Generally speaking, higher chroma saturation will make the color stronger and the image more vivid; greater brightness contrast The dynamic range of the image will make the color contrast of the image stronger and the layering more vivid. Among them, the coordinated correspondence between chroma saturation and brightness contrast can ensure the best overall visual effect of the image. If the brightness contrast is too high and the chroma saturation is insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/64H04N9/68
CPCH04N9/77H04N9/68
Inventor 牟秋斌李辉亮陈晨航
Owner ZTE CORP