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Image Dehazing Method Based on Multi-scale Dark Channel Prior Cascade Deep Neural Network

A deep neural network and dark channel prior technology, applied in the field of image dehazing based on multi-scale dark channel prior cascaded deep neural network, can solve the problems of strong data dependence and lack of real scene contrast.

Active Publication Date: 2020-06-12
ROCKET FORCE UNIV OF ENG
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  • Application Information

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Problems solved by technology

However, this method is very dependent on data due to the lack of comparison of real scenes.

Method used

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  • Image Dehazing Method Based on Multi-scale Dark Channel Prior Cascade Deep Neural Network
  • Image Dehazing Method Based on Multi-scale Dark Channel Prior Cascade Deep Neural Network

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Embodiment Construction

[0044] like figure 1 As shown, the image defogging method based on the multi-scale dark channel prior cascaded deep neural network of the present invention comprises the following steps:

[0045] Step 1. Establish a fog image training set: use the image data set of known depth to synthesize a group of foggy image training sets according to the atmospheric scattering model, effectively expanding the image data volume of the foggy image training set;

[0046] In this embodiment, the image data set of known depth includes the NYU image data set, and the public standard data set is used to train the experimental results. The method has strong adaptability, high image processing precision, and good defogging effect.

[0047] Step 2: Dehazing a single random hazy image, the process is as follows:

[0048] Step 201. Randomly extract a foggy image from the foggy image training set in step 1, and normalize the image size of a single random foggy image to obtain an image size of 2 m ×...

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Abstract

The invention discloses an image dehazing method based on a multi-scale dark channel prior cascade deep neural network, which includes the following steps: 1. Establishing a foggy image training set; 2. Dehazing a single random hazy image; 3. Calculate the loss objective function of the original single hazy image; 4. Update the weight parameter set; 5. Retrieve a new single random hazy image, and loop from step 2 to step 4 until the loss objective function of the original single hazy image Less than the loss objective function threshold, determine the final cascade dehazing model; 6. Dehaze a single actual hazy image. This invention uses convolutional neural networks to estimate dark channels and global illumination parameters on images of different scales, and then fuses dark channels and dehazed images step by step, and finally obtains dehazed images through supervised learning, effectively utilizing the power of deep neural networks. Feature modeling capabilities enable parameter fusion at different scales, enabling high-resolution dehazing images to be obtained with fewer model parameters.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image defogging method based on a multi-scale dark channel prior cascading deep neural network. Background technique [0002] Images collected under severe weather such as fog and haze will have quality degradation due to atmospheric scattering, which will make the image color off-white, reduce the contrast, and make it difficult to identify object features. It can also lead to biased understanding of image content. Image defogging refers to the use of specific methods and means to reduce or even eliminate the adverse effects of suspended particles in the air on images. Single image defogging refers to dehazing to obtain a clear image under the condition of only one foggy image. [0003] At present, single image dehazing methods are mainly divided into three categories: the first category is based on image enhancement methods, the second category is base...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10004G06T2207/20081G06T2207/20084G06T2207/20024G06T5/90G06T5/73
Inventor 崔智高苏延召李爱华王涛姜柯蔡艳平冯国彦李庆辉
Owner ROCKET FORCE UNIV OF ENG
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