Pointer instrument reading identification method

A technology of instrument reading and identification method, which is applied in the field of image processing, and can solve the problems of unfixed relative position between the camera and the instrument panel, uneven light, and low identification accuracy

Inactive Publication Date: 2018-01-19
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method for identifying readings of pointer meters, thereby solving the problem that the relative positi

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
  • Pointer instrument reading identification method
  • Pointer instrument reading identification method
  • Pointer instrument reading identification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0080] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0081] The method for recognizing the readings of pointer meters provided by the present invention can still realize the recognition of pointer meters without building a huge database when the relative position of the camera and the dial of the meter is not fixed, the light in the external environment is not uniform, and the imaging quality of the camera is not high. Automatic identification of ...

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 pointer instrument reading identification method. The method comprises the steps of extracting a dial plate, removing interference, and correcting the dial plate by using affine transformation; performing circle detection and straight line detection on the dial plate to obtain predicted circle center and pointer angle; based on features of a scale connected domain on thedial plate, screening out the scale connected domain, performing linear fitting on the scale connected domain, calculating an intersection point of every two fitting straight lines, and performing screening verification on a to-be-selected circle center by utilizing the predicted circle center and pointer angle to obtain the circle center of the dial plate, wherein a distance from the centroid ofthe scale connected domain to the circle center on the dial plate is the radius of the dial plate; and according to information such as the circle center of the dial plate, the radius of the dial plate, the straight lines of a pointer, extracting an arc scale bar of the dial plate, expanding the arc scale bar in a rectangular shape, then according to horizontal coordinate distribution of scale onthe rectangular scale bar, performing minimum and maximum scale detection, noisy point removal and scale insertion, and finally in combination with the pointer angle, calculating reading of the dial plate. The method is high in universality and high in timeliness; and the reading has relatively high accuracy.

Description

technical field [0001] The invention belongs to the technical field of image processing, and more particularly relates to a reading recognition method of a pointer instrument. Background technique [0002] In testing technology, pointer instruments are widely used in electric power, petroleum, chemical industry and other industries because of their simple structure and convenient use. In some test sites, such as outdoors that are not easy to observe or places that are harmful to personnel, it is difficult and dangerous to read the meter manually. In a working environment with harsh conditions, few people or a large amount of data, it is more difficult to guarantee its accuracy and work efficiency. Applying image processing technology to the automatic recognition of instrument readings can improve the accuracy of readings, reduce labor costs, and improve efficiency. [0003] For pointer instruments, the existing automatic recognition algorithm for pointer instrument reading...

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): G06K9/34G06T7/66
Inventor 韩守东夏鑫鑫冯知坤刘昱均
Owner HUAZHONG UNIV OF SCI & TECH
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap