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Wheel tread extraction and splicing method based on image processing

A technology for wheel tread and image processing, applied in image data processing, image enhancement, image analysis and other directions, can solve problems such as low robustness, and achieve the effects of high robustness, wide application prospects and good practicability

Inactive Publication Date: 2018-09-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the common train tread damage detection method has low robustness to the train tread segmentation method running at high speed. Good train wheel tread extraction and splicing method

Method used

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  • Wheel tread extraction and splicing method based on image processing
  • Wheel tread extraction and splicing method based on image processing
  • Wheel tread extraction and splicing method based on image processing

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Embodiment Construction

[0050] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0051] figure 1 Shown is a schematic flow chart of the wheel tread extraction and splicing method based on image processing. Generally speaking, the entire detection method includes the following process:

[0052] Step 1: Data Preprocessing

[0053] According to the characteristics of the fixed-point imaging of the wheel image acquisition equipment, the collected wheel images are numbered according to the layout of the acquisition equipment and the shooting sequence;

[0054] Step 2: Static Calibration

[0055] Place the wheel on the track for static calibration, divide the primary selection area S of the wheel tread in the wheel image, and record the calibration value l of the edge line position of the wheel tread fix , and obtain the curve equation y of the edge line of the wheel tread by least squares fitting;

[0056] Step 3: Grayscale Vert...

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Abstract

The present invention discloses a train wheel tread extraction and splicing method based on image segmentation and image fusion. The method comprises the steps of: dividing a wheel tread primary areaaccording to the feature of wheel image collection device fixed point imaging, employing a gray-scale projection technology, further locating a tread area according to the size of the gray projectionvalue and the variation rate, on this basis, employing an edge detection method to detect a wheel flange wire, completing wheel tread extraction, and finally, calculating the minimum smooth width according to the gray difference of a wheel tread overlapping area, splicing the wheel tread through a pixel matching method based on a space, and generating a 360-degree wheel tread panoramic image. Thewheel tread extraction and splicing method based on image processing belongs to the pre-processing technology of a locomotive damaging detection system, can effectively and rapidly extract the locomotive tread area, can improve the preprocessing speed of the locomotive damaging detection system, and has high practicability and wide application prospect.

Description

technical field [0001] The invention is a method for extracting and splicing train wheel treads based on image processing, relates to train wheel image processing technology, and more specifically relates to a preprocessing method for train wheel tread damage detection. Background technique [0002] With the development of railway transportation, the mileage of railway operation is increasing, and the total annual passenger traffic is increasing rapidly. Railway transportation has become an important mode of transportation in my country. Railway transportation has the characteristics of wide coverage and large passenger capacity, so railway transportation has become one of the main means of national transportation. The train wheel set is one of the important parts of the train running parts. The working state of the wheels will directly affect the running speed and safety of the train. If there is a problem with the wheels, it will cause unimaginable consequences. The train ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T3/40
CPCG06T7/0008G06T3/4038G06T2207/30164
Inventor 黎宁汪成吕洪波梅劲松袁家斌沈晓东蒋银男
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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