Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical three-dimensional measurement method with absolute phase measurement

A three-dimensional measurement and absolute phase technology, applied in the field of optical three-dimensional sensing, can solve problems such as low reliability, long measurement time, and complex decoding algorithms

Inactive Publication Date: 2010-08-18
ZHEJIANG NORMAL UNIVERSITY
View PDF1 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reliable measurement results can be obtained by using multiple coding patterns, and the decoding method is simple, but the measurement time is longer; while using a single coding pattern can improve the measurement speed, but usually the decoding algorithm is complicated and the reliability is relatively low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical three-dimensional measurement method with absolute phase measurement
  • Optical three-dimensional measurement method with absolute phase measurement
  • Optical three-dimensional measurement method with absolute phase measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] An optical three-dimensional measurement method using absolute phase measurement, comprising the following steps:

[0056] 1) A projector equipped with a grating projects a structured light pattern to the object;

[0057] 2), a camera shoots the deformed image reflected by the object at another position;

[0058] 3) Analyzing the deformed image reflected by the object, and obtaining the coordinates of the points on the projection plane corresponding to the points on the image plane of the camera;

[0059] 4) Calculate the coordinates of the measuring point of the object according to the geometric relationship for three-dimensional reconstruction, and obtain the three-dimensional image of the object;

[0060] It is characterized by

[0061] The structured light pattern described in step 1) includes a grating pattern and a spatial grayscale coding pattern,

[0062]The spatial grayscale coding pattern is constructed by the following steps:

[0063] A), the spatial gray...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of an optical three-dimensional sensor technology, particularly relating to an optical three-dimensional measurement method with absolute phase measurement. The invention provides a method which adopts a single assistant coding pattern, which combines the intercepting phase distributing characteristic with the coding pattern deforming characteristic ina phase coding project, and uses 3-value gray level coding, thereby improving the decoding reliability and simplifying the decoding algorithm. By adding a sine optical grating or a logic optical grating pattern with a space gray level coding pattern, the method realizes the absolute phase measurement to compute the three-dimensional feature and the space room of an object.

Description

technical field [0001] The invention belongs to the technical field of optical three-dimensional sensing, and in particular relates to an optical three-dimensional measurement method using absolute phase measurement. Background technique [0002] Optical 3D sensing technology based on structured light illumination has a wide range of applications in the fields of industrial inspection, quality control, machine vision, film and television special effects, and biomedicine. One of the key points of this technology is the matching of the corresponding points between the projection plane and the camera image plane, usually using color, grayscale, grating phase, or symbols or symbol sequences encoded by the above parameters to achieve corresponding point matching. [0003] The existing structured light lighting three-dimensional sensing technology can be divided into color-based and gray-scale-based coding schemes according to whether it is related to color; according to the param...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01B11/25
Inventor 李勇钱义先赵翠芳金洪震王辉金可有
Owner ZHEJIANG NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com