Check patentability & draft patents in minutes with Patsnap Eureka AI!

Font size test method and device for digital instrument

A digital instrument, font size technology, applied in measuring devices, optical devices, instruments, etc., can solve the problem of low accuracy, achieve the effect of solving high-quality requirements, and avoiding the problem of inability to test and test errors

Inactive Publication Date: 2016-04-13
SHANGHAI VISTEON AUTOMOTIVE ELECTRONICS SYST
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of using eyes to perform errata testing on images displayed on digital instrument LCDs is convenient and low-cost, but has the disadvantage of low accuracy

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
  • Font size test method and device for digital instrument
  • Font size test method and device for digital instrument
  • Font size test method and device for digital instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings. The following examples do not limit the invention. Without departing from the spirit and scope of the inventive concept, changes and advantages that can be imagined by those skilled in the art are all included in the present invention.

[0035] figure 1 It is a structural diagram of the digital instrument font size testing device based on the image processing technology of the present invention. The testing device includes a camera device 11 and a computer device 13 . The computer device 13 includes a linear relationship determination unit 131 , a character pixel information acquisition unit 132 in the camera coordinate system, a character pixel information acquisition unit 133 on a digital instrument LCD, a font size determination unit 134 and an input simulation tool 136 .

[0036] The photographing device 11 is used for taking calibration photos on the LCD displa...

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 font size test method and device for a digital instrument. The method comprises the steps that a) a camera device shoots a character displayed by an LCD display screen of the digital instrument and obtains a character photo; b) axis-x and axis-y pixel information of the character in the coordinate system of the camera device is obtained; c) according to the pre-obtained linear relation and the pixel information obtained in the step b), pixel information of the character displayed by the LCD display screen of the digital instrument is obtained; and d) the pixel information obtained in the step c) is compared with required pixel information, if the character pixel information satisfies the required pixel information, the font size of the character on the LCD display screen of the digital instrument is determined to be correct, and otherwise, incorrect. According to the invention, the automation degree of test can be improved, test time is reduced, and too much errors caused by artificial intervention are avoided.

Description

technical field [0001] The invention relates to a method and a device for testing the font size of a digital meter, in particular to a method and a device for testing the font size of a digital meter based on digital image processing technology. Background technique [0002] Corrections to images displayed on digital instrument LCDs are generally done manually by eye. The traditional method of performing errata testing on the image displayed on the digital instrument LCD with eyes is convenient and low-cost, but has the disadvantage of low accuracy. At present, major automobile manufacturers put forward more detailed requirements on the quality of digital instruments, and correspondingly put forward higher requirements on the testing department. For example, the customer requires that the characters displayed on the LCD of the digital instrument have a specific size, and the unit is accurate to the pixel. Specifically, the customer expects the character size to be no more ...

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): G01B11/00
CPCG01B11/002
Inventor 王炤晖
Owner SHANGHAI VISTEON AUTOMOTIVE ELECTRONICS SYST
Features
  • R&D
  • 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