Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Calibration method for circular structured light

A technology of circular structured light and calibration method, which is applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of high operational difficulty, need, and ignoring assembly errors, and achieve easy implementation, low experimental cost, and simple operation Effect

Active Publication Date: 2018-04-06
UNIV OF SCI & TECH OF CHINA
View PDF1 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires additional standard ring gauges, increasing the cost of the experimental setup
Moreover, it is required that the centerline of the ring gauge and the centerline of the circular structured light are absolutely coincident, and the experimental operation is very difficult.
[0007] 4. Albertazzi et al. also used the standard cylinder to move along the precise axis to calibrate the circular structured light equation, which also has the same disadvantages
Wang uses a concentric circle calibration plate to calibrate the detector based on cross-ratio invariance. This method requires the calibration plate to move precisely along the circular structured light axis, which is difficult to operate and requires a precise moving device.
[0008] 5. Wakayama et al. calibrated the detector parameters through precise processing and assembly, and this method did not consider assembly errors, but assembly errors often have to be considered
[0009] 6. Zhu et al. successfully calibrated the parameters of circular structured light with an auxiliary camera. This method is easy to operate, but this method requires an additional auxiliary camera, which increases the cost of the experiment

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
  • Calibration method for circular structured light
  • Calibration method for circular structured light
  • Calibration method for circular structured light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] An embodiment of the present invention provides a calibration method for circular structured light, the principle of which can be found in figure 1 , the overall idea of ​​the method is: place the calibration plate intersecting the circular structured light cone. At this time, a structured light curve where the circular structured light cone intersects with the calibration plate will appear on the calibration plate. The camera takes picture...

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 calibration method for circular structured light. The method comprises steps that a calibration plate and a to-be-calibrated circular structured light cone surface are arranged in an intersected mode, and a structured light curve generated because of intersection of the circular structured light cone surface and the calibration plate is made to appear on the calibration plate; on the basis of maintaining intersection of the calibration plate and the to-be-calibrated circular structured light cone surface, moving the calibration plate, N corresponding structured lightcurve pictures are shot; mark points of the calibration plate are utilized to calibrate internal parameters of the camera and external parameters of the camera relative to each structured light curvepicture, and a light curve discrete point coordinate corresponding to each structured light curve picture is solved; all the light curve discrete point coordinates are utilized to carry out non-linearfitting to acquire a circular structured light cone surface equation, and each parameter of the to-be-calibrated circular structured light cone surface is solved. The method is advantaged in that therelated device structure is simple, the method is easy for realization, and cost is relatively low.

Description

technical field [0001] The invention relates to the field of photogrammetry, in particular to a method for calibrating circular structured light. Background technique [0002] The circular structured light detection system is widely used in scene reconstruction, inner wall damage detection and industrial measurement. One of the key technical issues is the calibration of structured light, that is, to determine the expression equation of the circular structured light cone in the world coordinate system is very important. important. [0003] At present, the following schemes are mainly used for the calibration of structured light: [0004] 1. Zhang Guangjun and others used the drawing method to calibrate the outgoing structured light. The bright spots are generated by intersecting the thin lines with the line-structured smooth surface, and the three-dimensional positions of the bright spots are determined by two electric theodolites, and these bright spot positions are used t...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01D18/00
CPCG01B11/00G01D18/00
Inventor 汪连坡朱烨翟超顾永刚
Owner UNIV OF SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products