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Tobacco shred width measurement method based on image processing

A technology of width measurement and image processing, which is applied in the direction of measuring devices, instruments, optical devices, etc., can solve the problems of high labor intensity, large quantity of shredded tobacco, and irregular shape, so as to improve the measurement speed, ensure the measurement accuracy and improve the efficiency Effect

Inactive Publication Date: 2012-09-19
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0003] At present, the conventional measurement method is to use a projector, and the workers measure the cut tobacco one by one. In this method, the quantity of cut tobacco to be measured is large and the shape is irregular. For the measurers, the labor intensity is high, the speed is slow, and the stability of the test results is poor.

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  • Tobacco shred width measurement method based on image processing
  • Tobacco shred width measurement method based on image processing
  • Tobacco shred width measurement method based on image processing

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Embodiment Construction

[0025] In order to better understand the technical solution of the present invention, a further detailed description will be made below in conjunction with the accompanying drawings.

[0026] (1) Figure (1) is a flowchart involved in the present invention. The image acquisition work is realized through linear array CCD scanning. The parameters of the linear array CCD are that the pixel size is 4 μm, and the number of pixel arrays is 10550. The linear array CCD scans the cut tobacco samples placed on the stage at a uniform speed through a motor drive. And the collected images are transferred to PC via USB data cable.

[0027] (2) Image preprocessing: The collected image is a grayscale image with an order of 256. Firstly, the grayscale is stretched to increase the contrast of the grayscale value; then the median filter is used to smooth the grayscale image, and after filtering Take a global threshold to binarize the grayscale image. After the processing, the pixel value of the ...

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Abstract

The invention relates to a tobacco shred width measurement method based on image processing. The method comprises the following steps of: shooting images of tobacco shreds fixed on an objective table by using a linear array CCD (Charge-Coupled Device) camera under natural light; carrying out pretreatment, including image gray stretch, on scanned images; carrying out median filtering to denoise; carrying out global threshold processing so as to convert gray images into binary images; carrying out open / closed operation so as to remove coarse image points at edges of the images; carrying out segmentation on the acquired images to obtain small images of single tobacco shreds; and carrying out thinning and deburring treatment on the images of the single tobacco shreds, and measuring width of multipoint different points of the tobacco shreds by using a matrix flipping method. The width measurement method with the advantages of rapidness, simplicity and convenience, accuracy, and self-adapting capacity is obtained. The measurement method has an important significance to the high-accuracy and fast measurement of tobacco shred width.

Description

technical field [0001] The invention relates to a method for measuring the width of shredded tobacco by using image processing, which is used for image processing, on-line measurement, computer vision and industrial automation detection. It belongs to the field of computer digital image information processing. Background technique [0002] The shredding process is an important process on the shredded tobacco production line. Its main task is to cut the shredded tobacco with a suitable moisture content and temperature into shredded tobacco of a specified width, and reduce the output of shredded shredded tobacco as much as possible. The width of shredded tobacco is the main quality index of the shredded leaf cutting process. The width of shredded tobacco in the shredded tobacco cutting process of the tobacco industry in my country is 0.7~1.1mm, and the tolerance is ±0.1mm. The width of shredded leaf has a certain degree of influence on the physical index and sensory quality o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02
Inventor 邸成良赵维一胡松曾建温若愚周学政李东亮严伟
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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