Method and apparatus for enhancing video-signal image

An image enhancement, video signal technology, applied in image communication, TV, color TV and other directions, can solve the problem of blurred details and so on

Active Publication Date: 2007-11-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After filtering, the details of the image itself will b

Method used

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  • Method and apparatus for enhancing video-signal image
  • Method and apparatus for enhancing video-signal image
  • Method and apparatus for enhancing video-signal image

Examples

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[0024] Refer to FIG. 1, which is a flowchart of a first embodiment of a video signal image enhancement method provided by the present invention. As shown in the figure, the method specifically includes the following steps:

[0025] In step S1, filter processing is performed on the input image in the horizontal direction to remove high-frequency noise interference and ensure the image quality of the video signal. In specific implementation, the embodiment of the present invention may adopt Laplacian fourth-order filter processing.

[0026] In step S2, the sharpening coefficient is determined according to the scaling parameters of the input image. In this embodiment, an improved sharpening coefficient calculation formula can be used. The improvement is that the sharpening coefficient is configurable, and the formula is as follows:

[0027] C 0 +C 1 +C 2 =1;

[0028] C 0 =C 2 ;

[0029] C 1 =1-2C 0 ;

[0030] y n =C 0 x n-1 +C 1 x n...

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Abstract

The method comprises: in horizontal direction, the filter process is made for the inputted image; according to the scaling parameters, defining a sharpening factor; the sharpening process is made for the filtered image in horizontal direction; after processing, the image is outputted. The invention also reveals a video image enhancing device.

Description

technical field [0001] The invention relates to video signal processing technology, in particular to a video signal image enhancement method and equipment thereof. Background technique [0002] The information to be processed in video signal processing is very large video image data, which has quite high requirements for processing speed and precision. The current processing technology will always introduce various noises and distortions when converting the actual scene into an image signal, so various preprocessing of the image is required. As an important image processing technology, image enhancement can effectively make the image more suitable for the perception effect of human eyes and subsequent analysis and processing. [0003] Image smoothing and filtering technology is one of the most common image enhancement technologies in the field of digital signal processing. In the prior art, image enhancement generally adopts a matrix filtering method, the purpose of which ...

Claims

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Application Information

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IPC IPC(8): H04N5/21H04N5/14
Inventor 李萌
Owner HUAWEI TECH CO LTD
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