Method for quickly acquiring camera parameters in wide-range vision coordinate measurement

A technology of coordinate measurement and acquisition method, which is applied in the direction of measuring devices, instruments, optical devices, etc.

Inactive Publication Date: 2011-06-15
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the rapid acquisition method of camera parameters in large-scale visual coordinate measurement that can realize large-scale coordinate measurement in the field has not been reported yet.

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  • Method for quickly acquiring camera parameters in wide-range vision coordinate measurement
  • Method for quickly acquiring camera parameters in wide-range vision coordinate measurement
  • Method for quickly acquiring camera parameters in wide-range vision coordinate measurement

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] The method for quickly acquiring camera parameters in large-scale visual coordinate measurement of the present invention comprises the following steps:

[0036] Establish a world coordinate system with a specific reference object;

[0037] Take two optical targets as two known coordinate points;

[0038] Put the two CCD cameras in the appropriate position, collect the image data of two optical targets through the two CCD cameras respectively, and obtain the corresponding image plane coordinates. There are two ways to obtain the image plane coordinates, one is the manual method, that is Utilize image processing software such as ACDSee to obtain the image plane coordinates of optical target on the picture, another kind of method is to write a target automatic recognition software, directly provides the image plane coordinates of optical target (this emb...

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Abstract

The invention relates to a method for quickly acquiring camera parameters in the wide-range vision coordinate measurement, comprising the following steps of: establishing a world coordinate system according to a specific reference substance; taking two optical targets as two known coordinate points; respectively acquiring picture data of the two optical targets and corresponding image coordinates through two CCD (Charge Coupled Device) cameras; measuring the positions of the two optical targets through an electronic total station or a GPS (Global Positioning System), that is to say world coordinates of the two optical targets; measuring the translation vectors of the two CCD cameras through the electronic total station or the GPS; and substituting the world coordinates of the two optical targets, the image coordinates of the two optical targets and the translation vectors of the two CCD cameras into a measurement equation and resolving to obtain the focus lengths of the two CCD cameras and the horizontal declination angle of an optical axis. The method disclosed by the method has the characteristics of high speed, strong operability, easily-analyzed practical and algorithm performances, higher precision, suitability for long distance and the like; and the camera parameters can be solved linearly once by only placing the two optical targets.

Description

technical field [0001] The invention relates to a stereoscopic vision coordinate measurement technology, in particular to a method for quickly acquiring camera parameters in large-scale visual coordinate measurement for on-site calibration of the focal length of the camera and the horizontal deflection angle of the optical axis of the camera. Background technique [0002] Stereo vision coordinate measurement technology is widely used in communication, robot visual navigation, military science, machinery manufacturing, virtual reality and many other fields. The basic task of camera calibration is to use the two-dimensional image information acquired by the camera to calculate the geometric information of three-dimensional space objects (that is, to calculate the missing depth information in the plane image). Stereo vision coordinate measurement technology has been widely used at present, and various calibration methods are used, such as: traditional camera calibration method,...

Claims

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Application Information

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IPC IPC(8): G01B11/00
Inventor 宫俊玲王玉良
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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