Mine-oriented image saliency extraction defogging method and device and face detection

An image and salience technology, applied in the field of image processing, can solve the problems of defogging image distortion, uneven light source, and different degrees of image salience

Pending Publication Date: 2021-06-04
CHINA UNIV OF MINING & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a mine-oriented image saliency extraction and defogging method, device and face detection to solve the problems caused by the concentration of fog and dust in the mine, uneven light source and different image saliency. Problems of defogging image distortion, oversaturation and edge halo artifacts

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  • Mine-oriented image saliency extraction defogging method and device and face detection
  • Mine-oriented image saliency extraction defogging method and device and face detection
  • Mine-oriented image saliency extraction defogging method and device and face detection

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Embodiment 1

[0064] The specific embodiment 1 of the present invention discloses a mine-oriented image saliency extraction and defogging method, the flow chart is as follows figure 1 As shown, the logic block diagram is shown as figure 2 shown, including the following steps:

[0065] Get the original image of the fog in the mine. Specifically, the original fog image can be obtained from video images captured by a fixed camera or a vehicle-mounted camera in the mine.

[0066] Based on the histogram analysis, the original fog image is subjected to brightness reduction processing, and the atmospheric light estimation value is calculated according to the brightness reduction fog image.

[0067] A large-scale transmission map and a small-scale transmission map are obtained according to the estimated value of atmospheric light, the preset small-scale value and the large-scale value.

[0068] Based on the saliency map of the original foggy image, the large-scale transfer map and the small-sca...

Embodiment 2

[0129] The specific embodiment 2 of the present invention discloses a mine-oriented image saliency extraction and defogging device, including:

[0130] The fog image acquisition module is used to obtain the original fog image in the mine;

[0131] The atmospheric light estimation module is used to perform brightness reduction processing on the original fog image based on histogram analysis, and calculate the atmospheric light estimation value according to the fog image after the brightness reduction;

[0132] The fusion transmission map acquisition module is used to obtain the large-scale transmission map and the small-scale transmission map according to the estimated value of atmospheric light, the preset small-scale value and the large-scale value; based on the saliency map of the original fog image, the large-scale transmission map The saliency extraction dehazing model is obtained by merging with the small-scale transmission map; the L2 regularization is used to constrain ...

Embodiment 3

[0136] The specific embodiment 3 of the present invention discloses a mine-oriented face detection method. According to the mine-oriented image saliency extraction and defogging method in embodiment 1, the collected image in the mine is processed to obtain a defogged image ; Use the plane rotation face detection method to detect the face in the defogged image.

[0137] Specifically, in this embodiment, when using the plane rotation face detection method to detect the face in the defogged image, the full plane rotation (Rotation In Plane, RIP) face detection is used, which is divided into three layers of networks:

[0138] Detect the downward-facing face candidate for the first-layer network and rotate it by 180°, that is, reduce the RIP range from [-180°, 180°] to [-90°, 90°]; the detection is processed by the first-layer network The face candidate target and rotate it by 45°, that is, reduce the RIP range from [-90°, 90°] to [-45°, 45°], and at the same time judge whether it ...

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Abstract

The invention relates to a mine-oriented image saliency extraction defogging method and device and face detection, belongs to the technical field of image processing, and solves the problems of defogging image distortion, supersaturation and marginal halo artifacts caused by uneven fog dust concentration and light source and different image saliency degrees under a mine. The method comprises the following steps: acquiring an original fog storage image under a mine; carrying out brightness value reduction processing on the original fog storage image based on histogram analysis, and calculating an atmospheric light estimation value according to the fog storage image after brightness value reduction; obtaining a large-scale transmission graph and a small-scale transmission graph according to the atmospheric light estimated value, a preset small-scale numerical value and a preset large-scale numerical value; fusing the large-scale transmission image and the small-scale transmission image based on the saliency map of the original foggy image to obtain a saliency extraction defogging model; constraining the saliency extraction defogging model by using L2 regularization to obtain a fused transmission image; and based on the fused transmission image and the atmospheric light estimation value, inversely solving the atmospheric scattering model to obtain a defogged image.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a mine-oriented image saliency extraction and defogging method, device and face detection. Background technique [0002] At present, the coal mine underground monitoring system has been widely used. Safety monitoring and linkage control in dangerous areas can not only liberate personnel from dangerous environments, but also improve the guarantee ability of coal mine safety production and the monitoring and early warning level of natural disasters in mines. . However, the special environment under the mine has brought severe challenges to the image acquisition under the mine. In the underground environment, many fine particles gather in the air. These fine particles will absorb or refract light, affecting the normal radiation of light. When these fine particles gather too much in a certain area, fog and haze will be produced. Harsh environmental phenomena such as enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/90G06T5/40G06T5/50G06T5/00G06K9/00G06K9/62
CPCG06T7/0002G06T7/90G06T5/003G06T5/50G06T5/40G06T2207/10024G06T2207/20221G06V40/161G06F18/2415
Inventor 程德强尤杨杨王振宇寇旗旗
Owner CHINA UNIV OF MINING & TECH
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