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Video image enhancement method and device

An image enhancement and video image technology, applied in the field of image processing, can solve problems such as low visual experience and partial enhancement of noise

Active Publication Date: 2017-11-07
SANECHIPS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the current process of image sharpening, the strength of extracting high-frequency components needs to be fixed artificially, and since each pixel is sharpened for image enhancement, the noise in the image will also be Enhancement, but caused a lower visual experience

Method used

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  • Video image enhancement method and device

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Embodiment 1

[0066] Based on the above basic idea, see figure 1 , which shows the flow of a video image enhancement method provided by an embodiment of the present invention, the method may include:

[0067] S101: Obtain the frame-level noise intensity indicator value of the current frame according to the current frame of the video image and the corresponding pixel points of the previous frame;

[0068] S102: Obtain the noise weight and DC component corresponding to each pixel according to each pixel of the current frame and the preset first window;

[0069] S103: Obtain a high-frequency coefficient group corresponding to the current frame from the pixels of the current frame according to a preset sorting strategy;

[0070] S104: Obtain an image enhancement gain value according to the frame-level noise intensity indication value and the high-frequency coefficient group of the current frame;

[0071] S105: Obtain a high-frequency value corresponding to each pixel according to the image en...

Embodiment 2

[0144] Based on the same technical idea of ​​the foregoing embodiments, see Figure 5 , which shows a video image enhancement device 50 provided by an embodiment of the present invention, the device 50 may include: a frame-level noise detection module 501, a pixel noise detection module 502, a frame-level detail detection module 503, and a gain acquisition module 504. Pixel high-frequency generation module 505 and pixel enhancement module 506; the connection relationship between modules is characterized by signal flow direction, wherein,

[0145] The frame-level noise detection module 501 is used to indicate the frame-level noise intensity indicator value of the current frame according to the current frame of the video image and the corresponding pixels of the previous frame;

[0146] The pixel noise detection module 502 is configured to obtain the noise weight and DC component corresponding to each pixel according to each pixel of the current frame and the preset first window...

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Abstract

The embodiment of the invention discloses a video image enhancement method and device. The method can comprise the following steps: acquiring the frame level noise intensity indicator value of a current frame according to corresponding pixel points of the current frame and a previous frame of a video image; acquiring noise weights and direct current components corresponding to the pixel points according to the pixel points of the current frame and a preset first window; acquiring a high-frequency coefficient group corresponding to the current frame from the pixel points of the current frame according to a preset sequencing strategy; acquiring an image enhancement gain value according to the frame level noise intensity indicator value of the current frame and the high-frequency coefficient group; acquiring high-frequency values corresponding to the pixel points according to the image enhancement gain value, the pixel points of the current frame and the direct current components corresponding to the pixel points; and performing image enhancement on the pixel points of the current frame according to the high-frequency values corresponding to the pixel points of the current frame and the noise weights corresponding to the pixel points based on a preset image enhancement strategy to obtain a corresponding frame of the current frame after image enhancement.

Description

technical field [0001] The invention relates to image processing technology, in particular to a video image enhancement method and device. Background technique [0002] With the development of Internet technology and terminal technology, more and more users watch videos through terminals such as smartphones or tablets. However, due to the influence of objective factors such as network bandwidth, shooting technology, codec loss, and transmission interference, users may When watching a video on a terminal, the video image may be blurred, have severe noise, or even lose details. [0003] In response to the above situation, image sharpening is currently performed on video images. The specific process is to extract the high-frequency components of each pixel in the original image, and then add the high-frequency components to the corresponding pixels after accumulation, thereby improving the image quality. clarity. [0004] However, in the current process of image sharpening, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/208H04N5/21
CPCH04N5/208H04N5/21
Inventor 文锦松
Owner SANECHIPS TECH CO LTD
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