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

Method for achieving scene three-dimensional reconstruction by directly using phase with non-linear error

A nonlinear error, three-dimensional reconstruction technology, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as errors, complex nonlinear response models of projectors, etc., to avoid errors, loose target positions, and loose requirements. Effect

Active Publication Date: 2014-07-23
ZHEJIANG UNIV
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that when correcting the nonlinearity of the projector in advance, if the nonlinear response model of the projector is relatively complicated, errors will occur in the correction, and to provide a scene that directly utilizes the phase with nonlinear errors 3D reconstruction method

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
  • Method for achieving scene three-dimensional reconstruction by directly using phase with non-linear error
  • Method for achieving scene three-dimensional reconstruction by directly using phase with non-linear error
  • Method for achieving scene three-dimensional reconstruction by directly using phase with non-linear error

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The following uses the method of the present invention to achieve three-dimensional reconstruction and compares it with the traditional method, where (a) is the object to be reconstructed; (b) is the reconstruction result map without phase correction in the traditional method, and (c) is the phase used in the traditional method Reconstruction result diagram of the compensation method: (d) is a reconstruction result diagram obtained by using the method of the present invention. Affected by the nonlinear intensity response of the projector, the reconstructed results in Figure (b) have severe ripples. After phase correction, picture (c) gets a better result, but affected by the defocus of the projector, the phase compensation method still cannot completely eliminate the ripple. As a comparison with Figure (d), better results were obtained.

Embodiment 2

[0076] The following uses the method of the present invention to realize 3D reconstruction of another scene and compares it with the traditional method. Among them, (a) is the object to be reconstructed; (b) is the reconstruction result map without phase correction in the traditional method, and (c) is the traditional The reconstruction result diagram using the phase compensation method in the method: (d) is the reconstruction result diagram obtained by using the method of the present invention. Similar to Example 1, the present invention also obtains results superior to other methods.

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 discloses a method for achieving scene three-dimensional reconstruction by directly using a phase with a non-linear error. The method comprises the steps of for each given absolute phase value, calculating three-dimensional coordinates of spatial points with the absolute phase value in different depths in a scene area, and carrying gout surface fitting. When reconstruction is carried out, a corresponding surface equation is found according to the phase values of spatial points to be reconstructed, the surface equation and a sight line equation determined by video camera image pixel coordinates are combined, the three-dimensional coordinates of the spatial points are obtained through solution, and therefore the scene three-dimensional reconstruction is achieved. According to the method, the three-dimensional reconstruction is carried out by directly using the phase with the non-linear error, the situation that errors are generated due to the fact that an assumptive model does not conform to actual response situations of a projector in a phase correction method is avoided, and the precision of reconstruction is improved.

Description

technical field [0001] The invention relates to three-dimensional profilometry using a phase method, in particular to a method for realizing three-dimensional reconstruction of a scene by directly utilizing the phase with nonlinear errors affected by the intensity nonlinear response of a projector. Background technique [0002] Phase method 3D profilometry has the advantages of non-contact, high precision, and insensitivity to changes in object surface reflectance, so it is widely used in industrial inspection, cultural relics, anthropometry and other fields. A typical 3D reconstruction system includes an industrial camera and a structured light stripe projection device. Among them, the projector is widely used as a projection device because of its advantages such as convenience, flexibility and low cost. The traditional phase method 3D profilometry includes two important steps: phase calculation and system calibration. Phase calculation obtains the phase value of each pix...

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): G06T17/00G06T7/00
Inventor 沈会良韩天奇
Owner ZHEJIANG UNIV
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