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Method for measuring three-dimensional information of person or object through monitoring video or vehicle-mounted camera

A technology for monitoring video and cameras, which is applied in photogrammetry/video surveying, measuring devices, radio wave measuring systems, etc., and can solve the problems of high cost and high price of 3D laser scanners.

Inactive Publication Date: 2017-01-11
广东警官学院
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The requirements of the former ruled environment are generally unable to meet, while the latter's 3D laser scanner is expensive and costly

Method used

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  • Method for measuring three-dimensional information of person or object through monitoring video or vehicle-mounted camera
  • Method for measuring three-dimensional information of person or object through monitoring video or vehicle-mounted camera
  • Method for measuring three-dimensional information of person or object through monitoring video or vehicle-mounted camera

Examples

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specific Embodiment approach 1

[0038] In a suspected murder and corpse case, the height of the box in the video surveillance screen (such as figure 2 Shown) to obtain clues to determine whether the box is enough to hold an adult female. Correct figure 2 After analysis, the suspect in the image is walking, and other reference objects in the scene are difficult to use as a reference for scale measurement. The video image to be tested is not in a regular space, and it is difficult to obtain three-dimensional information of more than 6 marker points.

[0039] Using the method of the present invention, we use the three-dimensional reconstruction principle of stereo vision,

[0040] By obtaining two or more images of the object with different perspectives;

[0041] Calibrate the camera and establish a 3D to 2D mapping relationship;

[0042] Extract feature points, perform stereo matching and combine the principle of perspective transformation and collinear equations to calculate the three-dimensional information of th...

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Abstract

The invention discloses a method for measuring three-dimensional information of a person or an object through a monitoring video or a vehicle-mounted camera, and relates to the technical field of video monitoring. The method comprises the following steps: 1, acquiring two or more images in different visual angles according to a video monitoring picture; 2, calibrating the camera, and establishing a mapping relation between 3D to 2D (three-dimensional to two-dimensional); 3, extracting a feature point, performing stereo matching, and calculating the three-dimensional information of the feature point of the object to be measured in the video picture according to the perspective transformation principle and a collinearity equation; and 4, establishing a perspective transformation relation between coordinates of a space object point of the feature point and coordinates of a picture image point through close shot photographic measurement. The method can be used for measuring the three-dimensional information of the person or the object through the monitoring video or the vehicle-mounted camera.

Description

[0001] Technical field: [0002] The invention relates to a method for measuring the three-dimensionality of a person or an object through a monitoring video or a vehicle-mounted camera, and belongs to the technical field of video monitoring. [0003] Background technique: [0004] At present, there are three methods of using surveillance video to measure the character space: 1. Scale measurement, that is, it is necessary to find a reference object in the video, such as a table, door frame, and other objects with easy length, and the person (or object) to be measured. Compare with the reference to get the height (or length). This method must require a reference object, in some cases it is not allowed, and there is a certain error; 2. Perform investigation experiments, that is, return to the video scene to find similar people or objects for simulation, and make the effect in the video similar to the original video , To estimate the height of a person or the length of an object. This...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00G01S11/12H04N7/18
CPCG01C11/00G01S11/12G01C11/36H04N7/18
Inventor 廖广军武垚欣陈玮
Owner 广东警官学院
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