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Ore rock block degree measurement method based on improved FERRET

A measurement method and technology for ore and rock, which can be used in measurement devices, particle size analysis, instruments, etc., and can solve problems such as unstable measurement values ​​and lack of measurement directions.

Inactive Publication Date: 2014-07-30
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the lack of determination of the measurement direction in this method, the measured length and width vary with the direction of the rectangle, and the measured value is unstable.

Method used

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  • Ore rock block degree measurement method based on improved FERRET
  • Ore rock block degree measurement method based on improved FERRET
  • Ore rock block degree measurement method based on improved FERRET

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Experimental program
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Embodiment

[0049] Refer to attached figure 1 , following the technical scheme of the present invention, the ore lumpiness measuring method based on the improved FERRET of this embodiment is carried out according to the following steps:

[0050] Step 1, in order to remove the burr on the edge of the ore rock, the edge denoising of the blockiness of the ore rock is performed on the binary image, that is, the opening operation of the mathematical morphology is performed: that is, the line erosion, and then expansion, can be repeated many times, the number of times The amount is mainly determined according to the size of the ore block size and its shape requirements, the purpose is to perform edge smoothing and denoising processing on the contour lines of each ore block in the image;

[0051] Step 2: Label all ore and rock blocks in the image: labeling is the basic operation function for binary images, but there are many algorithms, mainly divided into 4-neighborhood and 8-neighborhood label...

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Abstract

The invention discloses an ore rock block degree measurement method based on improved FERRET. According to the method, target objects are subjected to labeling processing after the contours of the target objects are smoothed, the area, mass center and primary axis direction of each two-dimensional target object are solved based on 0-, 1- and 2-order moments of inertia, then a secondary axis direction which passes through the mass center and is vertical to the primary axis direction is solved according to the primary axis direction, the minimal external rectangle of the target object is solved based on the primary axis direction and the secondary axis direction, the length and width of the external rectangle are measured and regarded as the length and width of a measured object, the length-width ratio is regarded as a first shape parameter of the measured object, and the ratio of the area of the measured object to the area of the external rectangle of the measured object is regarded as a second shape parameter of the measured object. Compared with the prior art, the method disclosed by the invention is not affected by the rotation of objects, and two different shape parameters are added.

Description

technical field [0001] The invention relates to a method for measuring the lumpiness of ore and rock, in particular to a method for measuring the lumpiness of ore and rock based on the improved FERRET. Background technique [0002] The traditional artificial rock mass measurement methods are mostly sieving method or manual measurement method. The measurement and analysis methods not only have a large workload, low efficiency, limited sampling, but also the statistical results are not accurate enough. With the rapid development of computer technology, photography is gradually used to obtain two-dimensional images of ore-rock blockiness to analyze and process rock mass images, so as to obtain the size and shape distribution of rock blockiness. Although the United States, Canada, the United Kingdom, Germany, France, Italy, Sweden, Norway, Australia, and South Africa have successively developed such measurement and analysis methods, there is no standard and unified method, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G01B11/24
Inventor 王卫星
Owner CHANGAN UNIV
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