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High-precision speed measurement method based on binocular stereoscopic vision

A binocular stereo vision and high-precision technology, which is applied in the field of computer vision, can solve the problems of insufficient measurement accuracy and ignore the speed of the vehicle's lateral movement, and achieve the effects of accurate instantaneous speed, slowing down the impact of shocks, and improving the accuracy of speed measurement

Pending Publication Date: 2019-08-30
HENAN PROVINCE INST OF METROLOGY
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Problems solved by technology

[0005] The invention provides a high-precision speed measurement method based on binocular stereo vision, which solves the problem that the existing barrage distance measurement needs to identify the object to be measured before performing distance estimation, and ignores the speed of some vehicles moving laterally and the measurement accuracy is not high enough. question

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  • High-precision speed measurement method based on binocular stereoscopic vision
  • High-precision speed measurement method based on binocular stereoscopic vision
  • High-precision speed measurement method based on binocular stereoscopic vision

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[0029] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0030] Such as figure 1 Cameras 2 and 3 are installed above the vehicle 1 as a horizontal speed measuring binocular camera for lateral speed measurement of the vehicle 1, and cameras 4 and 5 are installed on the right side of the vehicle 1 in the windshield as a longitudinal speed measuring binocular camera for vehicle 1 Carry out longitudinal speed measurement, and then capture the speeding illegal vehicles. For vehicles that have been judged to be speeding, the CNN sliding window is used to cut and recognize characters, extract the license plate number, and upload it to the cloud so that the traffic police can retain evidence.

[0031] Such as figure 2 , a camera-by-chapter method based on binocular stereo vision. It is equipped with an automatic pan / tilt adjustment device and algorithm to avoid t...

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Abstract

The invention discloses a high-precision speed measurement method based on binocular stereoscopic vision. The method comprises the following steps of (a) setting a longitudinal speed measurement binocular camera and a transverse speed measurement binocular camera; (b) calibrating the longitudinal speed measurement binocular camera and the transverse speed measurement binocular camera to obtain a corresponding relation between the camera pixel points and the actual size; (c) acquiring an image of the moving object by using a longitudinal speed measurement binocular camera and a transverse speedmeasurement binocular camera, and acquiring feature points of the moving object through SIFT corner detection; (d) respectively calculating vehicle distances directly corresponding to two adjacent frames of images by utilizing a binocular parallax algorithm, and calculating longitudinal speed components and transverse speed components of the moving object according to the frame rate; and (e) properly synthesizing the longitudinal velocity component and the transverse velocity component to obtain the velocity of the moving object, so that the problems that the distance estimation can be carried out only by recognizing a measured object in advance in existing bullet screen distance measurement, the transverse movement speed of part of vehicles is ignored, and the measurement precision is not high enough, are solved.

Description

technical field [0001] The invention belongs to the field of computer vision, and in particular relates to a high-precision speed measurement method based on binocular stereo vision. Background technique [0002] If we can measure the speed of passing vehicles in the vehicle monitoring area in real time, and submit the obtained speed information to the management department in time, and seriously investigate and deal with speeding vehicles, it will greatly improve the road safety situation in our country. [0003] In recent years, computer vision, which began in the 1950s, has developed rapidly. It integrates image processing, pattern recognition, computer technology, computer graphics, neurophysiology and other disciplines, aiming to simulate the function of biological vision, that is, to recognize objects Carry out fine classification and determine the position and shape of objects. Due to the guidance of visual framework theory and the introduction of computer graphics, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/73G06T7/80G06K9/46
CPCG06T7/73G06T7/85G06V10/462
Inventor 王书升张伟伟司延召张勇赵楚亚徐凯刘涛张华伟蒋涛许林涛
Owner HENAN PROVINCE INST OF METROLOGY
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