Vehicle visor state detection method and device

A sun visor and vehicle technology, which is applied in the directions of instruments, character and pattern recognition, computer parts, etc., can solve the problems of large positioning error of the window area, weak anti-interference ability, and damage to the color balance of the sun visor. The effect of the rate

Active Publication Date: 2015-12-09
ZHEJIANG UNIVIEW TECH
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Problems solved by technology

However, the anti-interference ability of this technical solution is weak, and the positioning error of the window area is large. More

Method used

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  • Vehicle visor state detection method and device
  • Vehicle visor state detection method and device
  • Vehicle visor state detection method and device

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[0028] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the application as detailed in the appended claims.

[0029] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit the application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used h...

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Abstract

The invention provides a vehicle visor state detection method and device. The method comprises the steps that a visor classifier is trained; an image to be detected is acquired; the image to be detected is converted into a grayscale image; the position of a top-right corner of a window in the grayscale image is positioned to determine the position of the window; according to license plate information acquired from the grayscale image, maximum and minimum detection windows of a visor are set; within the range between the maximum detection window and the minimum detection window, detection windows of the visor are scaled according to a certain proportion; a number of scaled detection windows and the pre-trained visor classifier are used to carry out multiscale visor detection on an upper one-third image of the position of the window; and according to a preset visor image variance threshold and aspect ratio, detected visor images are screened to determine the state of the visor. According to the invention, the window can be precisely positioned, and the detection rate of the opened visor can be improved.

Description

technical field [0001] The present application relates to the technical field of video surveillance, in particular to a method and device for detecting the state of a vehicle sun visor. Background technique [0002] The sun visor, located at the front windshield of the vehicle, is designed to prevent the sun or glare from the light from affecting the driver's sight. When in use, it can be moved up and down to adjust the sunlight's exposure to the eyes and avoid traffic accidents. However, with the development of society, some criminals use sun visors to cover facial features to evade legal sanctions, which brings obstacles to the investigation of cases. Therefore, an intelligent sun visor state detection method is needed to quickly identify sun visors. Picture of the board turned on. [0003] In the prior art solutions, the line segment detection method is usually used to first locate the window area, and then use the color balance of the sun visor to extract the sun visor ...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V20/59
Inventor 陈鑫嘉
Owner ZHEJIANG UNIVIEW TECH
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