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A single-camera 3D reconstruction method based on photogrammetry

A technology of three-dimensional reconstruction and photogrammetry, applied in the field of optical measurement, can solve the problems of low precision, large influence on the manufacturing precision of the calibration reference, complicated operation, etc. Effect

Active Publication Date: 2016-08-10
新拓三维技术(西安)有限公司
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  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of the current 3D reconstruction based on the motion restoration structure method are: (1) the accuracy of the solution of the external parameters of the camera is not high, and it is greatly affected by the manufacturing accuracy of the calibration reference object; (2) the operation is relatively complicated

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  • A single-camera 3D reconstruction method based on photogrammetry
  • A single-camera 3D reconstruction method based on photogrammetry
  • A single-camera 3D reconstruction method based on photogrammetry

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Embodiment Construction

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0030] The hardware required by the present invention includes a camera, a background plate, a set of coded marker points and a computer. The method for three-dimensional reconstruction of a single-camera camera based on photogrammetry proposed by the present invention, the specific operation steps are as follows: figure 1 shown.

[0031] The first step is to prepare the measurement background plate: set several uniformly distributed circular coded mark points on the surface of the background plate; the coded mark points have circular coded rings as their ID identification marks. The background plate can use a square plate with a length and width of 400mm. Its preparation requirements: the surface is as flat as possible, and the mark points are scattered all over the entire surface, such as figure 2 shown. As an option, you can also select an area on a fl...

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Abstract

The invention discloses a single camera three-dimensional reconstruction method based on photogrammetry. The method is used for three-dimensional coordinate reconstruction of a key point of the surface of a part in industry manufacture. The method comprises the steps that 1, a measurement background plate is prepared; 2, three-dimensional data of the background plate are measured; 3, speckle characteristics are prepared; 4, image acquisition is carried out; 5, mark point detection is coded; 6, inside and outside parameters of a camera are solved; and 7, three-dimensional reconstruction is carried out. According to the invention, the single camera is used to realize three-dimensional reconstruction of the surface profile of a workpiece, and the method has the characteristics low equipment cost, non-contact measurement, high measurement accuracy and the like.

Description

technical field [0001] The invention relates to optical measurement technology, in particular to a single-camera three-dimensional reconstruction method based on photogrammetry. Background technique [0002] Three-dimensional reconstruction is an advanced optical measurement technology produced by the combination of computer vision technology and computer graphics technology in recent years. It restores the three-dimensional structure information of an object from two or more two-dimensional images. It is the reverse process of perspective imaging. 3D reconstruction is widely used in industrial fields, such as manufacturing and reverse engineering. [0003] Existing 3D reconstruction methods based on computer vision can be roughly divided into two categories: stereo vision methods and structure from motion methods. Among them, the stereo vision method uses two or more cameras, obtains the parallax through stereo matching, and restores the three-dimensional information of th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00G06T7/00G01B11/24
Inventor 唐正宗郭翔胡浩
Owner 新拓三维技术(西安)有限公司