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Method for making three-dimensional measurement of objects utilizing single digital camera to freely shoot

A digital camera, three-dimensional measurement technology, applied in the direction of measuring devices, optical devices, instruments, etc., to achieve the effect of avoiding cumulative errors, avoiding data redundancy, and facilitating high-efficiency model reconstruction

Inactive Publication Date: 2008-11-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The system has been commercialized and sold in our country, but at present, the system can only locate the spatial coordinates of a specific marker target (constituted by a black circle around a white dot), and is generally used to coordinate with other measurement methods for multiple Combination of viewing angle measurement data, instead of 3D measurement of curved targets, cannot be used for 3D digital model reconstruction of products with complex geometric shapes

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  • Method for making three-dimensional measurement of objects utilizing single digital camera to freely shoot
  • Method for making three-dimensional measurement of objects utilizing single digital camera to freely shoot
  • Method for making three-dimensional measurement of objects utilizing single digital camera to freely shoot

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Embodiment Construction

[0029] The embodiment of the object three-dimensional curve structure measuring method that the present invention proposes is described as follows: digital camera adopts the Nikon manual focusing digital camera that has built-in flashlight, resolution is 4256 * 2848, and computer adopts the Pentium IV microcomputer of main frequency 2.8GHz, memory 512MB , the measurement software system is implemented on the Visual C++6.0 platform.

[0030] according to figure 1 Describe the specific implementation mode and principle of the present invention: certain measurement preparations must be carried out before the measurement, including the target curve to be measured on the measured object (generally the characteristic line of the object and some parts of the object surface required for digital model reconstruction). Key section control line) to mark, so that its color brightness is obviously different from the color of the measured object itself, so as to facilitate image recognition...

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Abstract

This invention disclosed a three-dimension measurement method which consists of preparation, picture intussusception, coding spot identification, camera location confirmation, target curve pick-up, homonymic curve matching and target curve reconstruction. It has the following characteristics: mark on the target curve before measuring to make the picture identification much more easy; place a guage and a set of coding spots around the target object; screen randomly to obtain a set of image by the camera; calculate automatically the position and gesture of the camera according to the images; pick up the marked curve and match the homonymic curve in different images so that the information of three-dimensional spot line was automatically calculated.

Description

1. Technical field [0001] The three-dimensional object measurement belongs to the technical field of measurement and testing. The corresponding code in the International Classification is G01B. 2. Background technology [0002] The increasingly wide application requirements of 3D measurement technology in reverse engineering, industrial inspection, quality control and other fields have greatly promoted the rapid development of 3D measurement technology, and various measurement methods based on optics, acoustics, electromagnetics and mechanical contact principles have emerged, such as Coordinate measuring machine, laser scanner, structured light measuring instrument, etc. Among them, the three-coordinate measuring machine adopts mechanical contact sensing, which has high measurement accuracy, but generally requires a special measurement room and a special measurement table, which has high requirements for the measurement environment, limited measurement range, low measuremen...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G01B11/02G01B11/03G01B11/24
Inventor 张丽艳郑建冬张辉卫炜
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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