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Double-camera calibrating method in three-dimensional scanning system

A dual-camera, three-dimensional scanning technology, used in image communication, image analysis, image data processing, etc., can solve problems such as no imaging center correction

Inactive Publication Date: 2007-08-22
海安江理工技术转移中心有限公司 +1
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Problems solved by technology

The disadvantage is that in this method, the lateral spacing and vertical spacing of the photosensitive elements in the CCD array are considered to be known, and the imaging center is not corrected.

Method used

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  • Double-camera calibrating method in three-dimensional scanning system
  • Double-camera calibrating method in three-dimensional scanning system
  • Double-camera calibrating method in three-dimensional scanning system

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Embodiment Construction

[0056] The dual-camera calibration in the 3D scanning system includes: firstly calibrate the distortion coefficient; then use the distortion coefficient to correct the captured image, and then combine the ideal pinhole perspective model to calibrate the internal parameters of the camera. The internal parameters of the camera mainly include the imaging center, The inter-axial tilt factor and the equivalent focal length; finally, the external parameters of the left and right cameras are calibrated according to the internal parameters of the cameras, and the relative external parameters of the left and right cameras are calibrated by further using the external model of the dual cameras, which are characterized in that:

[0057] (1) Calibration of distortion coefficient

[0058] Use a group of marking dots on the parallel lines on the calibration plate, and according to the basic principle of linear perspective projection, use parallel lines to project the intersection point on the...

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Abstract

This invention relates to a double-vidicon calibration method in a three-D scan system including: calibrating aberration coefficient first, then correcting the pick-up image utilizing the aberration coefficient to calibrate the internal parameter of the vidicon combined with an deal pinhole perspective model, and the parameter includes an imaging center, slant factors among axeses and equivalent focuses, finally calibrating the outside parameters of the right and left vidicons based on the internal parameter and further utilizing the outer model of the double vidicons to calibrate relative outside parameters of the two vidicons to get the internal and outside parameters.

Description

technical field [0001] The invention relates to the calibration problem of dual cameras in a visual system, in particular to a dual camera calibration method in a three-dimensional scanning system. Background technique [0002] One of the basic tasks of computer vision is to calculate the three-dimensional information of the object in the field of view from the image captured by the camera, so as to reconstruct and recognize the three-dimensional object. The relationship between the three-dimensional geometric information of the object surface point and its corresponding point on the image is determined by the imaging model of the camera. The process of establishing this geometric model is actually the solution process of the camera parameters. Therefore, the calibration of camera parameters is the premise and key of this modeling process. The process of solving the camera parameters is called camera calibration. [0003] The document "Image Processing, Analysis, and Machi...

Claims

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Application Information

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IPC IPC(8): G06T7/00H04N17/00
Inventor 达飞鹏钱志峰
Owner 海安江理工技术转移中心有限公司
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