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Tire contour measurement method based on camera shooting

A profile measurement and tire technology, applied in the field of graphic processing measurement, can solve the problems of lack of real-time detection methods, hidden dangers of driving safety, etc.

Active Publication Date: 2019-07-26
南京链和科技有限公司
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Problems solved by technology

[0003] Serious tire wear or tire surface becomes very smooth, which will cause certain hidden dangers to driving safety. Therefore, a real-time, convenient and low-cost tread measurement feedback method is needed for tire tread wear and use status. At the same time, to provide a calculation basis for tire pay-per-use, there is still a lack of real-time detection methods for tread wear and usage status

Method used

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  • Tire contour measurement method based on camera shooting
  • Tire contour measurement method based on camera shooting
  • Tire contour measurement method based on camera shooting

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Embodiment Construction

[0083] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0084] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0085] The present invention extracts the sparse image of the tread outline and key point feature values ​​from a single two-dimensional image by using the same tire tread image taken at different positions by the camera of the mobile terminal, and establishes the image pixel gray value according to the tire tread The key point feature matrix of the rate of change and direction of change is used to calculate the feature values ​​of multiple identical key points in two or more sparse tread pattern images. By comparing the calculated camera internal parameters and the three-dimensional spac...

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Abstract

The invention discloses a tire contour measurement method based on camera shooting, and the method comprises the steps: firstly, carrying out the shooting of the same tire tread pattern image at different positions, and extracting a tire tread pattern contour sparse image and a key point feature value from a single two-dimensional image; secondly, establishing a change rate and a change directionkey point characteristic matrix of an image pixel gray value according to the tire tread, and calculating a plurality of same key point characteristic values in two and a plurality of tire tread sparse images; then, comparing and calculating a camera internal parameter and a three-dimensional space camera pose external parameter change prediction value with two or more actual observation values oftwo or more two-dimensional space pixel values, and fitting a three-dimensional tire tread contour space curve; and finally, comparing the actual three-dimensional spatial change data of the tread pattern obtained in any time period, and calculating the use abrasion loss of the tire in the time period. According to the tire tread measurement feedback method provided by the invention, a calculation basis is provided for the tire according to use payment while safe driving of the tire is ensured.

Description

technical field [0001] The invention discloses a tire wear measurement method, and specifically relates to the technical field of image processing measurement. Background technique [0002] Tire wear is mainly caused by the friction force generated by the sliding between the tire and the ground, and is closely related to the driving conditions of the vehicle such as starting, turning, and braking. The faster the vehicle turns, the faster the start, and the faster the braking, the faster the tire wears. [0003] Serious tire wear or tire surface becomes very smooth, which will cause certain hidden dangers to driving safety. Therefore, a real-time, convenient and low-cost tread measurement feedback method is needed for tire tread wear and use status. At the same time, to provide a calculation basis for tire pay-per-use, there is still a lack of real-time detection methods for tread wear and usage status. Contents of the invention [0004] The technical problem to be solved ...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/33G06K9/46G01B11/24
CPCG06T7/0002G06T7/33G01B11/24G06T2207/10004G06V10/462Y02T90/00
Inventor 向卫
Owner 南京链和科技有限公司
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