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

Non-diffracting photomoire fringe center positioning method and system

A stripe center and positioning method technology, applied in character and pattern recognition, image data processing, instruments, etc., can solve the problem of low positioning accuracy, achieve fast running speed, avoid low automation, and strong applicability

Active Publication Date: 2019-03-26
HUBEI UNIV OF TECH
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can simultaneously locate the centers of the two spot centers of the non-diffraction moiré fringe, avoiding the influence of the low degree of automation caused by the occlusion method, and also weakening the problem of low positioning accuracy caused by the fringe 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
  • Non-diffracting photomoire fringe center positioning method and system
  • Non-diffracting photomoire fringe center positioning method and system
  • Non-diffracting photomoire fringe center positioning method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0056] Combine below figure 1 , the present invention is further described:

[0057] step 1, yes figure 2 The non-diffraction-free Moiré fringe image containing noise is preprocessed to extract local concentric ring regions, such as image 3 shown. Specifically:

[0058] Step 1.1, use median filtering for denoising. Select the size S as a 3×3 neighborhood, arrange the pixel values ​​in the neighborhood according to the size of the intensity value, and select the middle value in the arranged pixel set as the new value of point A(m,n). Assuming that the ...

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 relates to a non-diffracting photomoire fringe center positioning method and system. The method comprises the following steps: step 1, carrying out image preprocessing on non-diffractingoptical moire fringes containing noise, and extracting a local concentric annulus region; Step 2, carrying out a series of morphological processing on the image processed in the step 1; Step 3, carrying out local concentric annulus detection on the image processed in the step 2; And step 4, for the image processed in the step 3, performing clustering analysis on the initial circle center set, deleting abnormal points in the two groups of circle center sets after clustering, and iteratively solving the center points of the two groups of circle center sets to realize diffraction-free optical moire fringe positioning. The device can position the centers of the two light spots of the non-diffracting photomoire fringes at the same time, is high in automation degree, high in positioning precision and wide in application range, and has good application prospects.

Description

technical field [0001] The invention relates to the field of non-diffraction light measurement, in particular to a method for positioning two central points in the precise measurement of moiré fringes formed by two beams of non-diffraction light. Background technique [0002] Non-diffracting light has attracted much attention because its central spot size and shape do not change with the transmission distance. With the continuous deepening of research on non-diffracting light, the application fields of non-diffractive light are becoming more and more extensive, such as precision measurement, laser processing, depth of field extension, etc. Accurately finding the position of the center spot of the non-diffraction light is an important prerequisite for achieving high measurement accuracy. Common non-diffracting light spot center positioning methods include light intensity center of gravity method, least squares circle fitting method and Hough circle transformation method, rin...

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): G06T7/13G06T7/136G06T7/12G06K9/62G06T5/00G06T5/30
CPCG06T5/30G06T7/12G06T7/13G06T7/136G06T2207/20032G06T2207/20036G06F18/23G06T5/70
Inventor 翟中生程壮吕清花王选择丁善婷张艳红李劲松黄娇洁
Owner HUBEI UNIV OF TECH
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