Plane area measuring method based on digital image analysis

A digital image and measurement method technology, applied in the direction of measuring devices, instruments, optical devices, etc., can solve problems such as inapproximation, non-consideration, and large calculation results, and achieve a wide range of applications, easy implementation and operation, and automation with high accuracy

Inactive Publication Date: 2014-03-19
INSPECTION & QUARANTINE TECH CENT OF GUANGDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU +2
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Problems solved by technology

[0004] However, these studies and applications in the prior art are all based on the fact that the measured object and the reference background are in or approximately on the same plane, that is, they do not consider that when the measured object and the reference background are in different planes, different shooting Effect of object distance on measurement results
For example, in the calculation of the contact area for the detection of nickel release in simulated jewelry, since the tar...

Method used

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  • Plane area measuring method based on digital image analysis
  • Plane area measuring method based on digital image analysis
  • Plane area measuring method based on digital image analysis

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] see figure 1 , is the method flowchart of the first embodiment of the digital image analysis-based plane area measurement method provided by the present invention.

[0043] In the present embodiment, the described plane area measurement method based on digital image analysis comprises the following steps:

[0044] Step S1: Establish a camera system and set a camera background plane.

[0045] see figure 2 , is a schematic structural diagram of the camera ...

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Abstract

The invention discloses a plane area measuring method based on digital image analysis, which comprises the steps of establishing a photographing system and setting a photographing background plane; placing a measured object on the photographing background plane and enabling the measured object to be parallel to the photographing background plane; carrying out imaging by using the photographing system to acquire a measured digital image; processing the measured digital image and calculating the reference area and a reference pixel value of a reference image; calculating a target pixel value of the measured plane; calculating the target measurement area of the measured plane; calculating an area correction coefficient; and carrying out correction on the target measurement area according to the area correction coefficient so as to acquire the actual area of the measured plane. The plane area measuring method disclosed by the invention is based on digital image analysis technique, enables plane area measurement to be realized conveniently, and has the advantages of high accuracy and wide application range.

Description

technical field [0001] The invention relates to the technical field of plane area measurement, in particular to a plane area measurement method based on digital image analysis. Background technique [0002] In many occasions, it is necessary to measure the surface area of ​​irregularly shaped objects, such as the calculation of map area in monitoring and survey activities, the calculation of plant leaf area in botanical research, the calculation of lesion area in medical plastic surgery, and the release of nickel from simulation ornaments. The calculation of the contact area in the test, the calculation of the contact area in the detection of the migration of harmful substances in food contact materials, etc. [0003] At present, there are many methods for measuring the plane area, which can be roughly divided into manual measurement method and electronic technology measurement method. The manual measurement method has simple equipment and easy operation, but it is time-con...

Claims

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Application Information

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IPC IPC(8): G01B11/28
Inventor 刘卓钦张瑞钟怀宁彭肖颜
Owner INSPECTION & QUARANTINE TECH CENT OF GUANGDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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