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

Calibration plate, calibration plate identification method and calibration plate identification device

A technology for calibration boards and recognition results, applied in image data processing, instruments, calculations, etc., can solve problems such as limited applicable scenarios, and achieve the effects of reducing interference, improving recognition accuracy, and improving accuracy

Inactive Publication Date: 2019-08-20
北京阿丘机器人科技有限公司
View PDF16 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the limited applicable scenarios, the existing calibration board cannot meet the requirements of better recognition accuracy of the calibration board under various conditions.

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 plate, calibration plate identification method and calibration plate identification device
  • Calibration plate, calibration plate identification method and calibration plate identification device
  • Calibration plate, calibration plate identification method and calibration plate identification device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 of the present invention provides a calibration plate, see figure 1 The schematic diagram of the calibration board structure shown, the calibration board includes:

[0031](1) The calibration board is a plane calibration board; the calibration board is provided with characteristic dots arranged at equal intervals in a matrix; the characteristic dots are all arranged inside the outer frame.

[0032] Set characteristic dots arranged at equal intervals in n rows and m columns on the flat calibration board, the distance between adjacent circle centers can be set to 1 (the unit can be determined according to actual needs), and the dot radius is about 1 / 4. Feature dots can be printed on specific materials, such as paper, glass, ceramics, aluminum, film, etc. Different materials can have a variety of different printing processes (such as photolithography, laser engraving, light painting, laser printing, etc.).

[0033] The characteristic dots provide the most fu...

Embodiment 2

[0045] Embodiment 2 of the present invention provides a calibration plate identification method, see Figure 5 The schematic diagram of the flow chart of the calibration plate identification method shown in the method, the method includes the following steps:

[0046] Step S502, acquiring the target image captured by the camera including the calibration plate as in Embodiment 1;

[0047] The camera may be a camera to be calibrated. The target image is an image including a complete calibration plate image as in Example 1 or an image including a part of the calibration plate as in Example 1. Part of the reference plate may be, for example, a reference plate whose edge is partially blocked.

[0048] Step S504, determine the position of the calibration board in the target image, and determine the estimated position and world coordinate system position of each dot in the calibration board area according to the marked characteristic dots;

[0049] The position of the calibration ...

Embodiment 3

[0070] Embodiment 3 of the present invention provides a calibration plate identification device, see Image 6 The schematic block diagram of the structure of the calibration plate identification device shown, the device includes:

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 provides a calibration plate and a calibration plate identification method and device, and relates to the technical field of camera calibration, wherein the calibration plate is a planecalibration plate and is provided with feature dots which are arranged in n rows and m columns at equal intervals; the feature dots are arranged in the outer frame; the central area of the calibrationplate is provided with three mark feature round points; wherein the diameter of the mark feature dot is greater than that of the feature dot; wherein the three mark feature dots are not collinear, and any two mark feature dots are arranged in the same row in a non-adjacent manner and are arranged in the same column in a non-adjacent manner; touch round points are arranged at the circle centers ofthe characteristic round points of at least three vertexes of the calibration plate, and the radius of the touch round points is far smaller than that of the characteristic round points. The calibration precision can be optimized.

Description

technical field [0001] The invention relates to the technical field of camera calibration, in particular to a calibration board, a calibration board identification method and a device. Background technique [0002] Camera calibration is the basic link of machine vision applications such as visual measurement and 3D reconstruction. The accuracy and precision of the calibration results directly determine whether the vision system can work normally. Camera calibration refers to the process of using the camera system to capture the image of the calibration plate, using the three-dimensional coordinates of the known feature points in the calibration plate and the corresponding image coordinates on the image to solve the camera parameters. Camera calibration includes camera calibration data collection and camera parameter calculation. Most of the calibration plates used in camera calibration data acquisition are checkerboard and circular arrays. Among them, during the use of the...

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): G06T7/70G06T7/194G06T7/80
CPCG06T7/70G06T7/194G06T7/80G06T2207/10004
Inventor 崔坤黄耀孙超
Owner 北京阿丘机器人科技有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com