Non-contact scanning method for three-dimensional colour point clouds

A technology of color point cloud and scanning method, which is applied in image data processing, 3D modeling, instruments, etc., can solve problems such as layering of 3D point cloud, achieve the effect of improving splicing efficiency and rich system texture information

Inactive Publication Date: 2011-11-16
VISION SENSITIVE TECH CO LTD
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  • Abstract
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Problems solved by technology

If this step is not done properly, 3D point cloud stratification will occur throughout the subsequent stitching process

Method used

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  • Non-contact scanning method for three-dimensional colour point clouds
  • Non-contact scanning method for three-dimensional colour point clouds
  • Non-contact scanning method for three-dimensional colour point clouds

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Embodiment Construction

[0021] The three-dimensional scanning system image acquisition unit that the present invention adopts is made up of two color scanning cameras and an industrial structured light projector, see figure 1 . The entire scanning system is controlled by a computer, and 8 striped lights of different resolutions are projected onto the surface of the object to be measured through a structured light projector. At the same time, the computer controls two CCD image sensors to collect each projected color image to form a Gray space-time Coding, the computer will calculate the three-dimensional coordinates of the measured object space according to the positions of the two image pixels with the same phase (that is, the same gray space-time code) and the relative positions of the two CCD sensors.

[0022] The main process of system software processing is as follows: figure 2 Shown: First, preprocess the images captured by the left and right cameras, and save each texture feature point after...

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Abstract

The invention belongs to the technical field of image three-dimensional information reconfiguration and relates to a non-contact scanning method for three-dimensional colour point clouds, which uses a structured light projector and two CCD cameras to acquire images and comprises the following steps: acquiring a single-face image of a measured object; performing Gray space-time coding on the colour image of each width strip structured light, which is projected to the surface of the measured object, by using the corresponding information of the stripe light; calculating a three-dimensional coordinate of the measured object according to namesake phase positions of each pair of image pixels and opposite positions of two CCD sensors; calculating colour information of a three-dimensional coordinate point of the measured object by a three-dimensional space linear interpolation method; extracting textural features of the colour image; forming the single-face colour point clouds according to the calculated three-dimensional coordinate and the colour information thereof; forming the multi-face point clouds; and splicing different colour point clouds. The non-contact scanning method for the three-dimensional colour point clouds of the invention has the advantages of simple operation and high precision.

Description

technical field [0001] The invention belongs to the technical field of image three-dimensional information reconstruction, and relates to a non-contact scanning method of three-dimensional color point cloud. Background technique [0002] At present, non-contact color 3D modeling is generally carried out by color texture mapping method. This method is not accurate enough and the operation is very complicated. However, the object splicing of black and white 3D scanning system is carried out by pasting marker points. This process is complicated to operate and the recognition algorithm The stability is not high, which belongs to a semi-automatic method. When using this method for stitching, the marked points on the surface of the object are used as reference points, and the system can stitch them together in a unified coordinate system according to these common reference points from different angles, so as to obtain complete 3D scanning data. Accurately identifying the position...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
Inventor 马杰魏兵杨岳高阳
Owner VISION SENSITIVE TECH CO LTD
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