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Camera calibration method

A camera calibration and camera technology, which is applied in image analysis, image data processing, instruments, etc., can solve the problems that the accuracy needs to be further improved, and achieve the effect of small amount of calculation

Inactive Publication Date: 2017-06-16
朱森
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such methods are flexible and practical, but the accuracy needs to be further improved

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] Any feature disclosed in this specification (including the abstract and drawings), unless specifically stated, can be replaced by other equivalent or similar purpose alternative features. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0024] Such as figure 1 As shown, the geometric model benchmark is established, and the original video image collected by the camera erected on the highway is used as the benchmark, and three points are drawn. The distance between the drawn points is equal to the distance on the act...

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Abstract

The invention provides a camera calibration method, which is characterized by utilizing a marked line on a road surface as reference, and abstracting out a geometric model between pixel rows in a traffic video and road actual distance according to the camera imaging principle; and carrying out analysis on the geometric model to obtain a distance mapping relation between pixel rows in a video image and actual road surface. The method can geometrically deduce external parameters without considering internal parameters of a camera, is simple and practical and is small in calculation amount.

Description

technical field [0001] The invention relates to a camera calibration method, in particular to a camera calibration method suitable for traffic video. Background technique [0002] Video detection technology has an important application in traffic information detection. It mainly uses image processing technology to perform a series of processing on the acquired traffic video images, extracts useful information, and completes the detection of traffic parameters, traffic conditions and traffic events. It is an ITS (Intelligent Transportation System) is a hot research direction. In the application of video detection technology in photogrammetry, computer vision and other fields, a basic problem is the calibration of the camera. In the actual image and video processing, in order to determine the mapping relationship between the three-dimensional coordinates of the actual space object and the corresponding points on the image, it is necessary to establish the corresponding geomet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80
Inventor 朱森
Owner 朱森