A height measurement method, device and monitoring system

A height measurement and actual height technology, applied in the computer field, can solve the problems of increasing hardware costs and not being widely used, and achieve the effect of simple, real-time analysis and processing, and high computing efficiency

Active Publication Date: 2015-11-25
VIMICRO ELECTRONICS CORP
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AI Technical Summary

Problems solved by technology

[0004] The commonly used object height measurement method is the stereo vision method, which uses two or more images to first reconstruct the scene in three dimensions, and then measure the objects in the scene. However, this method needs to be registered, and because it cannot be accurate The registration makes this scheme unable to be widely used
At the same time, using this method requires the use of multiple image capture devices at the same time, which greatly increases the hardware cost

Method used

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  • A height measurement method, device and monitoring system
  • A height measurement method, device and monitoring system
  • A height measurement method, device and monitoring system

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Embodiment Construction

[0057] Before describing the embodiments of the present invention in detail, the concepts involved in the embodiments of the present invention will be described in detail, so as to better understand the embodiments of the present invention.

[0058] Scenes in real life will cause different visual reflections due to different viewing distances and orientations. This phenomenon is the perspective phenomenon, and each frame of image in the video captured by the image capture device has the above phenomenon.

[0059] At the same time, the imaging principle of the existing image capture device conforms to the central projective transformation, that is to say, the images of the parallel lines in the space in the picture must intersect at one point, and this intersection point is called the vanishing point (Vanishing Point) of the group of parallel lines. ).

[0060] The vanishing line (VanishingLine) represents the intersection line between the image plane and a plane parallel to th...

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Abstract

The invention provides a method, a device and a monitoring system for height measurement. The method comprises the following steps: acquiring a first image shot by an image shooting device, wherein the first image contains an object to be measured in the shooting area of the image shooting device; fixing shooting parameters of the image shooting device; determining the coordinates of the highest point and the lowest point of the object to be measured in the first image; and calculating the actual height of the object to be measured based on the acquired coordinates of the highest point and the lowest point of the object to be measured in the first image and an image parameter. The invention sidesteps the registration problem, is simple to implement, has high operation efficiency, and can carry out real-time analysis and processing. The invention only uses one image shooting device, thereby lowering the implementation cost based on the height measurement of the image.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a height measuring method, device and monitoring system. Background technique [0002] Intelligent video surveillance is a monitoring method based on computer vision technology to analyze video images in the surveillance scene, extract key information in the scene, and form corresponding events and alarms. It has extremely wide applications in public safety protection, traffic management, etc. [0003] Video-based object pose estimation refers to the determination of the pose of a person in a three-dimensional space from the moving image sequence of an object captured by an image capture device. It is an important technology, and it has broad application prospects in various aspects, such as judging whether it meets the requirements by monitoring the height of the vehicle, measuring the actual height of the human body at the crime scene, etc. [0004] The commonly used object ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/03H04N7/18
Inventor 王磊谢东海黄英
Owner VIMICRO ELECTRONICS CORP
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