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Video image processing method, device and equipment

A technology of video image and processing method, which is applied in the direction of color signal processing circuit, brightness and chrominance signal processing circuit, etc., can solve the problems of poor adjustment effect and inability to automatically adjust the brightness and chroma of video image, etc., and achieve better display effect Good, less resource utilization, strong universal applicability

Active Publication Date: 2012-11-14
ZTE CORP
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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

The invention discloses a video image processing method, a device and equipment. The method comprises determining an average chrominance saturation level and an average luminance contrast ratio of an original image according to luminance components and chrominance components of pixels of the original image; comparing the determined chrominance saturation level with a set saturation enhancement threshold to determine a chrominance saturation adjustment amount, and comparing the determined the average luminance contrast ratio with a contrast enhancement threshold to determine a luminance contrast adjustment amount; generating a mapping table containing the chrominance components and the luminance components after the pixels are enhanced and adjusted according to the chrominance saturation adjustment amount, the luminance contrast adjustment amount and a set intensity control coefficient; and adjusting the chrominance and the luminance of the pixels of the original image according to the mapping table to obtain an enhanced target image. According to the video image processing method, the device and the equipment, the chrominance saturation and the luminance contrast ratio of the image can be adjusted automatically according to the luminance and the chrominance of the original image to obtain a good 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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IPC IPC(8): H04N9/64H04N9/68
CPCH04N9/77H04N9/68
Inventor 牟秋斌李辉亮陈晨航
Owner ZTE CORP
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