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Measuring Method of Length and Cylinder Surface Based on Digital Image Analysis

A technology of digital image and length measurement, which is applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problem that the perimeter and area of ​​curved surfaces cannot be measured, achieve high degree of automation and accuracy, easy implementation and operation, and improve precision effect on accuracy

Inactive Publication Date: 2019-05-31
INSPECTION & QUARANTINE TECH CENT OF GUANGDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the technical solutions in the prior art are only suitable for measuring the area of ​​a plane, and cannot measure the perimeter and area of ​​a curved surface

Method used

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  • Measuring Method of Length and Cylinder Surface Based on Digital Image Analysis
  • Measuring Method of Length and Cylinder Surface Based on Digital Image Analysis
  • Measuring Method of Length and Cylinder Surface Based on Digital Image Analysis

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] see figure 1 , is the method flow chart of the first embodiment of the length measurement method based on digital image analysis provided by the present invention.

[0049] In this embodiment, the length measurement method based on digital image analysis includes the following steps:

[0050] Step S1: establishing a camera system and setting a camera background plane.

[0051] see figure 2 , is a schematic structural diagra...

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Abstract

The invention discloses a length measuring method based on digital image analysis. The method comprises: establishing a shooting system, and arranging a shooting background plane; obtaining a measured digital image; processing measured digital image, and calculating an amplification multiple M; drafting a perimeter curve of a measured plane on the measured digital image, and calculating the measuring length of the perimeter curve; dividing the measuring length of the perimeter curve by the amplification multiple M to obtain the perimeter length of the measured plane; calculating a length correction coefficient; and correcting the perimeter length of the measured plane to obtain the actual perimeter length of the measured plane. The invention also provides a cylindrical surface area measuring method. The cylindrical surface area of a measured object can be obtained by use of an actual perimeter length and a cylindrical surface width which are measured so that the methods have the advantages of simplicity, high accuracy, wide application scope, and accurately measured curved surface area.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a length and cylinder measurement method based on digital image analysis. Background technique [0002] The length or surface area of ​​irregularly shaped objects needs to be measured in many occasions, such as map area calculation in monitoring and surveying activities, plant leaf area calculation in botanical research, lesion area calculation in medical plastic surgery, artificial jewelry nickel Calculation of contact area in release detection, calculation of contact area in detection of migration of hazardous substances in food contact materials, etc. [0003] At present, there are many methods for measuring length or plane area, which can be roughly divided into manual measurement method and electronic technology measurement method. The manual measurement method is simple in equipment and easy to operate, but it is time-consuming and labor-intensive, and the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G01B11/28
Inventor 刘卓钦张瑞张志辉彭肖颜
Owner INSPECTION & QUARANTINE TECH CENT OF GUANGDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU