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Method and device for automatically sharpening video image

A video image and image sharpening technology, applied in image enhancement, image data processing, closed-circuit television system, etc., can solve problems affecting video quality, noise amplification, etc., and achieve the effect of avoiding excessive amplification and enhancing edges and details

Active Publication Date: 2015-11-11
武汉众智数字技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a video image automatic sharpening method and device, aiming at solving the problem that commonly used video image sharpening technology will make the noise of the video surveillance camera be excessively amplified in a low-light environment and affect the video quality. technical problem

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  • Method and device for automatically sharpening video image
  • Method and device for automatically sharpening video image

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Embodiment 1

[0033] figure 1 A flow chart of the video image automatic sharpening method provided by the embodiment of the present invention is given, and only the parts related to the embodiment of the present invention are given for convenience of description.

[0034] The video image automatic sharpening method provided in this embodiment includes the following steps:

[0035] In step 201, a brightness image of a video image is acquired as an original image.

[0036] Since human eyes are more sensitive to luminance information, this embodiment only describes the processing of luminance images, and the chrominance images can be processed in the same manner. After the video image is collected, the brightness image is extracted from the collected video image as the original image, denoted as f 0 (x,y).

[0037] In step 202, a video image sharpening level and a sharpening threshold are determined according to the brightness information of the video image.

[0038] In this step, it is fi...

Embodiment 2

[0058] image 3 The flow chart of the video image sharpening method provided by the embodiment of the present invention is given, and only the parts related to the embodiment of the present invention are given for the convenience of description.

[0059] The video image automatic sharpening method provided in this embodiment includes the following steps:

[0060] In step 301, brightness information of a video image is acquired as an original image.

[0061] In step 302, a video image sharpening level and a sharpening threshold are determined according to brightness information of the video image.

[0062] In step 303, determine the currently running sharpening mode, wherein, if the running sharpening mode is the manual sharpening mode, go to step 304; if the running sharpening mode is the automatic sharpening mode, go to step 305.

[0063] In step 304, when the sharpening mode is the manual sharpening mode, the input sharpening level and sharpening threshold are received and...

Embodiment 3

[0068] Figure 4 The structure diagram of the video image sharpening device provided by the embodiment of the present invention is given, and only the parts related to the embodiment of the present invention are given for the convenience of description.

[0069] The video image automatic sharpening device provided in this embodiment includes: an image acquisition unit 41, a level determination unit 42, a template generation unit 43, and a sharpening processing unit 44, specifically:

[0070] The image acquisition unit 41 is configured to acquire a brightness image of a video image as an original image;

[0071] A level determination unit 42, configured to determine a video image sharpening level and a sharpening threshold according to the brightness information of the video image;

[0072] The template generating unit 43 is used for blurring the original image to obtain a blurred image, and subtracting the blurred image from the original image to obtain a template image; acco...

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Abstract

The invention belongs to the technical field of video monitoring and image processing and provides a method and device for automatically sharpening a video image. The method comprises: using the brightness image of the video image as an original image; determining a sharpening grade and a sharpening threshold value of the video image according to the brightness information of the video image; performing fuzzy processing on the original image to obtain a fuzzy image and subtracting the fuzzy image from the original image to obtain a template image; enhancing the template image according to the brightness grade, the sharpening grade, and the sharpening threshold value of the current image in order to obtain an enhanced template image; and adding the original image to the enhanced template image to obtain a target image. The technical method provided by the invention may automatically adjust the sharpening grade and the sharpening threshold value of the current video image according to the brightness information of the video image, may enhance the edges and the details of the video image in an environment with sufficient light, and may prevent noise from being excessively amplified and influencing video quality in a sharpening process in an environment with low illumination.

Description

technical field [0001] The invention belongs to the technical field of video monitoring and image processing, and in particular relates to a video image automatic sharpening method and device. Background technique [0002] The image information collected by the video surveillance camera may contain noise information due to physical limitations of the image sensor itself, interference from different light sources, low illumination of the working environment, and temperature effects of the image sensor. In the process of video image processing and transmission, in addition to noise factors, some image processing algorithms, such as image smoothing algorithms, will blur the outline and details of the video image, causing the outline and details of the video image to be unclear. Image sharpening can compensate the outline of the image, enhance the edges, details, and grayscale transitions of the image, making the image clearer and more suitable for human observation and recognit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00H04N7/18
Inventor 方宏伟陈洪李尚荣涂崖村
Owner 武汉众智数字技术有限公司
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