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A Method for Extracting Meter Pointers of Special Vehicles

A technology of instrument pointer and extraction method, which is applied in the field of video image processing and recognition, can solve the problems of short pointer length and difficulty in precise extraction of pointers of special instruments, etc., and achieve the effect of fast speed

Inactive Publication Date: 2016-05-18
63963 TROOP OF THE PLA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The pointers of special vehicle instruments are wider and shorter than the pointers of general industrial instruments, which brings great difficulties to the precise extraction of pointers of special instruments

Method used

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  • A Method for Extracting Meter Pointers of Special Vehicles
  • A Method for Extracting Meter Pointers of Special Vehicles
  • A Method for Extracting Meter Pointers of Special Vehicles

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Embodiment Construction

[0035] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] The overall flow chart of the implementation of the present invention is as follows figure 1As shown, the pointer image of the instrument is obtained through the camera, the straight line is obtained by Hough transform first, and then the pointer is obtained according to the rules, and then the double edge is used for verification. For instrument images or simple images with good image quality, two pointer edge straight lines may be found by using Hough transform, which means that the pointer extraction is very accurate. After verification, the pointer extraction process ends. If the image quality is not good, or there are words or dial stains next to the pointer, or dial light spots and other interferences, the Hough transform often cannot find 2 edge straight lines, but only finds 1 or even 0 edge straight lines. That is, if the...

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Abstract

The invention provides an extraction method for a gauge pointer of a special vehicle. The method is characterized by comprising the step of accurately extracting the gauge pointer by adopting a detection and verification integrated algorithm, wherein a detection algorithm comprises a Hough transformation method, a grey-level projection method based on polar coordinates, and the least square method based on pointer edge points. In the extraction method provided by the invention, three pointer extraction methods are integrated, the respective advantages are reserved, and the defects of the methods aiming at the gauge pointer of a special vehicle are overcome, so that automatic extraction for the pointer is very accurate aiming at the images with different qualities of the gauge pointer of the special vehicle; and the extraction method provided by the invention can be applied to extraction for the gauge pointers of lots of special vehicles of different types.

Description

technical field [0001] The invention belongs to the technical field of video image processing and recognition, in particular to the video image of the instrument of a special vehicle (such as an armored vehicle), which automatically extracts the pointer of the pointer instrument of the special vehicle. Background technique [0002] Special vehicles refer to vehicles that exceed the design vehicle limits in terms of outline size, weight, etc., and special-purpose vehicles. In addition to armored vehicles, they can also be armored vehicles, ambulances, fire trucks, police cars, engineering rescue vehicles, and military supervision vehicles. Wait. Special vehicle gauges are important instruments and equipment for special vehicles. The pointer instrument conforms to people's habit of quick reading, and is simple in structure, easy to use, and stable in performance. On special vehicles, there are still a large number of pointer instruments used. In order to identify and calibr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/46
Inventor 王涛白真龙郭迎春张伏龙李广峰张华张昌俊赵玉林
Owner 63963 TROOP OF THE PLA
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