Method for measuring average size of complicated particles based on Canny boundary detection

A technology of average size and boundary detection, applied in the field of image processing, can solve the problems of increased cost and cost of secondary blasting, and achieve the effect of fast detection speed and high precision

Inactive Publication Date: 2012-07-25
FUZHOU UNIV
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Problems solved by technology

If the value of k50 is too low, the cost of rock blasting will increase; conversely, if the value is too high, the cost of truck loading, transportation and secondary blasting will all increase

Method used

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  • Method for measuring average size of complicated particles based on Canny boundary detection
  • Method for measuring average size of complicated particles based on Canny boundary detection

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Embodiment Construction

[0020] The present invention is based on the complex particle average size measuring method of Canny boundary detection, carries out as follows:

[0021] Step 1: Input moving particle image f ( x , y ), generally it can be the particle image on the conveyor belt or other dynamic particle images, but the background area in the particle image should not be too large, preferably less than 20%;

[0022] Step 2: Carry out smoothing filter, remove the noise in described particle image, this process can be expressed as: ,in h Represents a smoothing filter, which uses a Gaussian filter:

[0023] Step 3: Set an image size threshold. When the image size is larger than the image size threshold, the image will be reduced proportionally: when the image is larger than 1024x1024 pixels, the image will be reduced by one time, and if the image is larger than 2000x2000 pixels, the image will be reduced by two times;

[0024] Step 4: Perform Canny boundary scan on the processed image, an...

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Abstract

The invention relates to the technical field of image processing, in particular to a method for measuring an average size of complicated particles based on Canny boundary detection. The method comprises the following steps of 1, inputting an image of moving particles; 2, performing Gaussian smoothing noise removal; 3, when the image size is greater than an image size threshold value, shrinking the image; 4, performing Canny boundary scanning, and converting the image into a binary image; 5, calculating the particle edge density of the image, and determining an average shape parameter of the particles and a background space parameter of the image; and 6, calculating the average size of the detected particles and the number of detected particles. through adoption of the method, the average size and the number of the particles in the image can be detected quickly and accurately; and the method is very suitable to statistics and measurement of a plurality of complicated particles at real time on line and can be used for pre-partitioning acomplicated particle image.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for measuring the average size of complex particles based on Canny boundary detection, which is suitable for the segmentation of moving densely distributed video particle images. Background technique [0002] A machine vision system based on optical and computer technology is often a part of the production control line, which can improve production speed and quality, and unify rules and standards. In recent years, industrial inspection using computer vision has been applied in many different fields, for example, integrated circuits, steel production, poultry processing, road construction, rock breaking, etc. [0003] In the quarrying industry, it is very important to assess the quality of the stone. Stone is a mixture of natural rock blocks and blasted and mechanically broken rock blocks. In order to judge the quality of the stone, it is necessary to estimate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/10G06T5/00
Inventor 王卫星
Owner FUZHOU UNIV
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