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Single-image truck volume measurement method based on three-dimensional model

A volume measurement and truck technology, applied in the field of truck volume measurement and toll collection system, can solve the problems of high work intensity and low degree of automation, and achieve the effects of improving measurement efficiency, avoiding manual measurement, high speed and precision

Inactive Publication Date: 2015-07-15
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a single image truck volume measurement method based on 3D model, to solve the problem of high work intensity and low degree of automation of the current measurement method

Method used

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  • Single-image truck volume measurement method based on three-dimensional model
  • Single-image truck volume measurement method based on three-dimensional model
  • Single-image truck volume measurement method based on three-dimensional model

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Embodiment Construction

[0039] refer to figure 1 , the truck volume measurement steps of the present invention are as follows:

[0040] Step 1, establish a virtual reality environment.

[0041] (1.1) Express the real camera intrinsic parameter matrix as: K = f 0 u o 0 f v o 0 0 1 . Use a real camera to take 9 photos of the calibration board at different angles, such as figure 2 Shown; use the matlab camera calibration toolbox to process these 9 photos to get the internal parameter matrix K of the real...

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Abstract

The invention discloses a single-image truck volume measurement method based on a three-dimensional model. The single-image truck volume measurement method mainly solves the problems that a current measurement method is large in work intensity and not high in automation degree. The single-image truck volume measurement method includes the steps of 1, calibrating intrinsic parameters of a true camera, building a virtual reality environment through an OpenGL function library, and guiding an image of a measured truck and the three-dimensional model of the truck into the environment; 2, identifying feature points of the truck in the image of the truck with an ASM algorithm, and building the relationship between the image of the measured truck and the three-dimensional model of the truck; 3, automatically matching the three-dimensional model of the truck with the image of the measured truck through to-be-matched points on the image of the measured truck and control points on the three-dimensional model of the truck; 4, calculating the volume of the measured truck through the volume of the three-dimensional model of the truck according to the proportional relation between the virtual reality environment and the true environment. The single-image truck volume measurement method is rapid and accurate in measurement and high in automation degree, and can be used for a charging system of an expressway.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to a method for measuring the volume of a truck, which is used in a toll system of an expressway. Background technique [0002] At present, for trucks, expressway toll stations have to first measure the volume of the truck compartment, and then charge the truck according to the volume of the truck compartment. At present, the measurement of the volume of trucks by expressway toll stations generally adopts the method of manual measurement, which measures the length, width and height of the vehicle respectively, and then calculates the volume of the vehicle. Using this method of manual measurement, the workload of the operator is relatively large, and the measurement accuracy is difficult to guarantee, especially in the case of heavy traffic flow and bad external weather conditions, the work intensity of the operator is relatively high. Therefore, it is very important to stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/60
Inventor 孙伟李鹏慧赵春宇郭宝龙
Owner XIDIAN UNIV
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