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Image defogging method and system

An image and frame image technology, applied in the field of image processing, can solve the problems of heavy operating burden of the executive body, complex calculation process, high cost of image defogging, etc., and achieve good defogging effect and simplified complexity

Pending Publication Date: 2022-02-25
AXERA SEMICON (SHANGHAI) CO LTD
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Problems solved by technology

Among them, the image defogging scheme based on software algorithm mostly adopts the basic principle based on dark channel priori. Although this scheme can achieve a good defogging effect, its calculation process is relatively complicated, resulting in a large operating burden for the executive body of the scheme. ; The hardware-based image defogging scheme needs to consume a lot of hardware resources, resulting in a large cost of image defogging

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  • Image defogging method and system
  • Image defogging method and system

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Embodiment approach

[0033] For the aforementioned step S106, the embodiment of the present invention provides an implementation manner in which the target image is obtained by performing defogging processing on the image to be processed according to the first defogging parameter, see the following steps 1 to 2:

[0034] Step 1: Calculate a second dehazing parameter corresponding to each pixel in the image to be processed according to the first dehazing parameter. In one embodiment, the second dehazing parameter corresponding to each pixel can be determined according to the following steps 1.1 to 1.3:

[0035] Step 1.1, perform upsampling processing on the first dehazing parameters, and determine the first dehazing parameters corresponding to each pixel in the image to be processed. In one embodiment, the upsampling parameter can be set, so that the grayscale mapping value and the dark channel mapping value are respectively upsampled according to the upsampling parameter, so that both the grayscal...

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Abstract

The invention provides an image defogging method and system. The method comprises the steps of reading a previous frame image corresponding to a to-be-processed image through an image processing chip, and generating a grayscale image and a dark channel image corresponding to the previous frame image; calculating a first defogging parameter based on an image defogging algorithm, the grayscale image and the dark channel image through the data processor; and reading the first defogging parameter and the to-be-processed image through the image processing chip, and performing defogging processing on the to-be-processed image according to the first defogging parameter to obtain a target image. According to the invention, the complexity of the image defogging operation process can be simplified, the calculation advantages of hardware resources can be fully exerted, and a good defogging effect is achieved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image defogging method and system. Background technique [0002] The haze environment has a great impact on the image / video quality. Dehazing the image / video can increase the visibility of the image / video, thereby improving the image / video quality. Currently, software algorithm-based image defogging schemes and hardware-based image defogging schemes are proposed in the related art. Among them, the image defogging scheme based on software algorithm mostly adopts the basic principle based on dark channel priori. Although this scheme can achieve a good defogging effect, its calculation process is relatively complicated, resulting in a large operating burden for the executive body of the scheme. ; The hardware-based image defogging scheme needs to consume a lot of hardware resources, resulting in a high cost of image defogging. Contents of the invention [000...

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Application Information

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IPC IPC(8): G06T5/00G06T5/20
CPCG06T5/20G06T2207/10016G06T5/73
Inventor 芦云龙
Owner AXERA SEMICON (SHANGHAI) CO LTD
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