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Paper porosity measuring and pore diameter analyzing method based on digital image processing

An analysis method and porosity technology, which is applied in the field of paper performance characterization, can solve the problems of inability to reflect the distribution of pores and the inaccuracy of paper porosity, and achieve the effect of saving sample consumption and saving time

Inactive Publication Date: 2018-09-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

[0006] In order to overcome the defect that the paper porosity measured by calculation method and experimental method is not accurate enough in the prior art and cannot reflect the specific distribution of pores, the present invention provides a paper porosity measurement and pore size analysis method based on digital image processing

Method used

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  • Paper porosity measuring and pore diameter analyzing method based on digital image processing
  • Paper porosity measuring and pore diameter analyzing method based on digital image processing
  • Paper porosity measuring and pore diameter analyzing method based on digital image processing

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Embodiment

[0037] Such as Figure 1-Figure 3 As shown, a paper porosity measurement and pore size analysis method based on digital image processing includes the following steps:

[0038] Step 1, reading the paper cellulose fiber microstructure image obtained by taking an environmental scanning electron microscope (SEM);

[0039] Step 2, the image is converted from an RGB image to a grayscale image, and then binarized to obtain a binary image;

[0040] The binarization process is specifically as follows:

[0041] Convert the image from the RGB format to a grayscale image, and then use a double threshold to binarize the grayscale image to obtain a binary image BWa;

[0042] Divide the image into 100 small areas of 10x10, and use a local threshold to binarize the grayscale image for each small area to obtain a binary image BWb;

[0043] The binary image BWa and the binary image BWb are superimposed to obtain the final binary image.

[0044] Step 3, using morphological methods to optimiz...

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Abstract

The invention discloses a paper porosity measuring and pore diameter analyzing method based on digital image processing. According to the method, a paper cellulose fiber microstructure image is converted into a gray level image, a binary image is obtained through a double-threshold binarization method, morphology is utilized to optimize the binary image, an improved fiber structure binary image isobtained, equivalent circle diameters of all pore areas can be further obtained, and finally, pore diameter distribution statistics are performed according to pixel areas, actual areas and the equivalent circle diameters of all the pore areas.

Description

technical field [0001] The invention relates to the technical field of paper performance characterization, in particular to a paper porosity measurement and pore size analysis method based on digital image processing. Background technique [0002] The birth of paper has a long history, and it is still widely used and indispensable in life. Today's society has entered the electronic virtual age, but the application of paper materials is still important. [0003] In the past, paper materials were mainly used in writing paper, printing, hand-painted drawings and paper packaging, etc., and now they have expanded to all aspects, such as paper-based flexible lithium batteries, paper-based lithium battery separators in energy, and more importantly, various New technologies and new products have a growing demand for new functional paper, such as: paper-based chips, paper-based luminescent materials, and paper-based friction materials. [0004] Traditionally, the porosity of paper ...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N15/02
CPCG01N15/0227G01N15/08G01N15/088G01N2015/0846
Inventor 刘旺玉谢卫规党艳萍彭羽健闫长媛
Owner SOUTH CHINA UNIV OF TECH
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