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Video image target positioning method based on three-dimensional laser point cloud

A video imaging and 3D laser technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as the application limitations of video surveillance technology, and achieve the effect of saving manpower and material resources, reasonable design, and simple interaction

Pending Publication Date: 2019-12-27
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

This makes the application of video surveillance technology in actual engineering limited

Method used

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  • Video image target positioning method based on three-dimensional laser point cloud
  • Video image target positioning method based on three-dimensional laser point cloud
  • Video image target positioning method based on three-dimensional laser point cloud

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Embodiment Construction

[0047] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0048] like figure 1 As shown, a video image target location method based on a three-dimensional laser point cloud includes the following steps:

[0049] A video image target positioning method based on a three-dimensional laser point cloud, comprising the steps of:

[0050]Step 1: Use the vehicle-mounted mobile measurement system to quickly collect the 3D coordinate point cloud data within the monitoring range of the video surveillance equipment, convert to the plane projection coordinate system through data fusion processing and spatial coordinate reference transformation, and obtain the point cloud data in the plane projection coordinate system , as the basic point cloud data, so that different video equipment data are in the same measurement coordinate system;

[0051] Step 2: By selecting the feature points with the same name on the point...

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Abstract

The invention discloses a video image target positioning method based on three-dimensional laser point cloud, which belongs to the technical field of vehicle-mounted laser scanning point cloud data processing. According to the invention, the method has the following steps: using a vehicle-mounted mobile measurement system for rapidly collecting three-dimensional laser point cloud data of a monitoring range of video monitoring equipment; according to the laser point cloud data and a certain frame of image of a video obtained by the video monitoring equipment, carrying out matching according topoint cloud and image homonymy feature points to calculate internal and external orientation elements of the video monitoring equipment; then generating a same-resolution distance image consistent with the photographing orientation of the video equipment according to the internal and external orientation elements of the video monitoring equipment and the scanned point cloud data; and finally, through the video image at any moment, obtaining an image point coordinate of the target object on the video image at the moment, obtaining a distance corresponding to the target image point on the distance image, and calculating an actual coordinate corresponding to the target according to the external orientation element of the video monitoring equipment, thereby realizing accurate positioning of the target in the video image.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted laser scanning point cloud data processing, and in particular relates to a video image target positioning method based on a three-dimensional laser point cloud. Background technique [0002] Video surveillance technology is widely used in the security industry, and the application of video technology is getting higher and higher. Traditional video surveillance systems are generally only used to obtain target image features and target feature measurements. Target image features are generally interpreted directly from video images. However, the measurement of target features generally compares the size of the target on the image with the reference features on the image to obtain the measurement and other information of the target feature. At present, most video surveillance equipment is composed of a camera. According to the perspective transformation relationship, the obtained video image d...

Claims

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Application Information

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IPC IPC(8): G06T7/73
CPCG06T7/73G06T2207/10021
Inventor 俞家勇刘如飞田茂义卢秀山王旻烨
Owner SHANDONG UNIV OF SCI & TECH
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