Three-dimensional reconstruction method based on coding structured light

A technology of coding structured light and 3D reconstruction, applied in 3D modeling, using optical devices, image data processing, etc., can solve the problems of low reconstruction accuracy, complex calculation, and low matching accuracy, etc.

Active Publication Date: 2010-03-10
ZHEJIANG UNIV OF TECH
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Problems solved by technology

[0005] In order to overcome the disadvantages of complex calculation, low matching accuracy and low reconstruction accuracy of existing 3D reconstruction methods of visual imaging systems, t

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  • Three-dimensional reconstruction method based on coding structured light
  • Three-dimensional reconstruction method based on coding structured light
  • Three-dimensional reconstruction method based on coding structured light

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Embodiment Construction

[0095] The present invention will be further described below in conjunction with the accompanying drawings.

[0096] refer to Figure 1 to Figure 20 , a 3D reconstruction method based on encoded structured light, comprising the following steps:

[0097] 1) Project structured light to the object under test, and the camera captures the image modulated by the object under test;

[0098] 2), carry out optical template matching, comprise the following steps:

[0099] (2.1), the positioning of the light strip boundary:

[0100] The optical template to be detected is a one-dimensional stripe code, which is scanned along each column of the image, and each channel of each pixel is preprocessed with a one-dimensional column operator. The one-dimensional operator is shown in the attached figure Figure 8 As shown in , determine the pixel point with strong grayscale change as the candidate edge point, select a certain size area with the candidate edge point as the center on each column ...

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Abstract

The invention discloses a three-dimensional reconstruction method based on coding structured light, comprising the following steps: 1) projecting structured light to an object to be measured, and capturing an image modulated by the object to be measured by a camera; 2) matching an optical template, comprising: (2.1) positioning the optical strip boundary, scanning along each row of the image, determining a pixel point with strong gray variation as a candidate marginal point, and searching a local domain; and (2.2) matching the optical strip: adopting a color cluster method to build a color matching proper vector, comparing image color with a projected color, and defining Euclidean distance between the color proper vector and the cluster center to distribute the colors of red, green, blue and white of the candidate optical strip; and 3) using a calibrated system parameter for three-dimensional reconstruction of the object to be measured, determining the relation between a space point coordinate and the image coordinate point thereof by the calibrated conversion matrix parameter; and restoring three-dimensional spatial coordinate from the image coordinate of a feature point. The invention can simplify calculation process and has high matching precision and high reconstruction precision.

Description

technical field [0001] The invention relates to computer vision, data processing, and image processing, especially a three-dimensional reconstruction method based on coded structured light. Background technique [0002] The purpose of computer vision is to represent and understand a wide variety of image inputs. In the past two decades, the three-dimensional contour reconstruction of objects has been one of the important purposes of computer vision. There are many realization methods of 3D object contour reconstruction and measurement technology, mainly including contact and non-contact methods. Non-contact measurement is mainly divided into two categories, one is optical methods, and the other is methods other than optics. [0003] Optical method measurement can be divided into two categories: active and passive. The former generates an image by the radiation signal of the object or the signal reflected by the surface of the object, and the imaging device does not send o...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T7/00G01B11/25
Inventor 陈胜勇胡正周管秋原长春潘贝李帅王万良
Owner ZHEJIANG UNIV OF TECH
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