External parameter calibration method for 3D camera group

A calibration method and camera technology, applied in image data processing, instrumentation, calculation, etc., can solve the problems of poor robustness, inconvenient operation, low precision, etc., and achieve the effect of good real-time performance, simple operation and high precision

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A calibration method and camera technology, applied in image data processing, instrumentation, calculation, etc., can solve the problems of poor robustness, inconvenient operation, low precision, etc., and achieve the effect of good real-time performance, simple operation and high precision

CN108288294AInactive Publication Date: 2018-07-17视缘(上海)智能科技有限公司

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[0042] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0043] The hardware devices required in this embodiment include: a calibration board for calibrating the camera group, a camera group, and a display for receiving and displaying the planar checkerboard image.

[0044] A method for calibrating external parameters of a 3D camera group, comprising the steps of:

[0045] S1. Calibration of camera internal parameters:

[0046] S1.1 Connect the camera to the power supply and connect it to the computer through the USB interface, print the checkerboard, and paste the checkerboard on the plate to ensure that the surface of the checkerboard is flat enough, so that a simple calibration board is ready;

[0047] S1.2 Put the calibration board in the camera field of view, control to turn on the camera, and start shooting checkerboard images for camera calibration;

[0048] S1.3 Move the camera in many different direction...

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Abstract

The present invention discloses an external parameter calibration method for a 3D camera group, which can solve the problems of the inconvenient operation, low precision and poor robustness in the existing camera calibration technology. The method comprises the following steps: S1 carrying out calibration of internal parameters for a 3D camera group; S2 carrying out calibration of the external reference for the camera pair; and S3 using the pedestrian detection to calibrate the external parameters of the camera group. The method disclosed by the present invention has a simple operation, high precision and good robustness, has obvious advantages compared with the prior art, and is suitable for market promotion.

Description

technical field [0001] The invention relates to a camera calibration technology, in particular to an external parameter calibration method for a 3D camera group. Background technique [0002] Camera calibration is the most critical part in machine vision inspection, photogeometric measurement, etc. The purpose of camera calibration is to calculate the geometric information such as the three-dimensional position and shape of the object by starting from the two-dimensional image information obtained by the camera. In this way, the corresponding relationship between the points on the two-dimensional image and the surface points of the space object is obtained. This relationship is determined by the geometric model of camera imaging. The parameters of these models are called camera parameters, mainly including internal parameters and external parameters. Camera calibration is the process of calculating these parameters. [0003] At present, the camera calibration methods commo...

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Application Information

Patent Timeline

17 Jul 2018

Publication

CN108288294A

IPC: G06T7/80

CPC: G06T7/85

Inventors: 骞志彦; 陈学伟