CN108335285A - A kind of diamond abrasive grain wear rate assay method based on image procossing - Google Patents
A kind of diamond abrasive grain wear rate assay method based on image procossing Download PDFInfo
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- 239000006061 abrasive grain Substances 0.000 title claims abstract description 93
- 229910003460 diamond Inorganic materials 0.000 title claims abstract description 51
- 239000010432 diamond Substances 0.000 title claims abstract description 51
- 238000003556 assay Methods 0.000 title claims abstract description 9
- 230000011218 segmentation Effects 0.000 claims abstract description 37
- 238000001914 filtration Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000003708 edge detection Methods 0.000 claims abstract description 17
- 230000000877 morphologic effect Effects 0.000 claims abstract description 17
- 238000005299 abrasion Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 13
- 239000011435 rock Substances 0.000 claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 10
- 230000010339 dilation Effects 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 5
- 230000003044 adaptive effect Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
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- 230000007812 deficiency Effects 0.000 abstract description 2
- 239000000284 extract Substances 0.000 abstract 2
- 238000011156 evaluation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003709 image segmentation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000386 microscopy Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 241000220324 Pyrus Species 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 235000021017 pears Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G06—COMPUTING; CALCULATING OR COUNTING
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- G06T5/00—Image enhancement or restoration
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/13—Edge detection
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- G06T2207/00—Indexing scheme for image analysis or image enhancement
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- G06T2207/20036—Morphological image processing
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Abstract
The present invention provides the diamond abrasive grain wear rate assay methods based on image procossing, first, medium filtering and gaussian filtering are carried out to diamond abrasive grain image, obtain the enhancement metal hard rock Debris Image being polymerized by medium filtering image and gaussian filtering image, abrasive grain region segmentation is carried out to enhancement metal hard rock Debris Image using edge detection and morphological method, and extracts the abrasive grain area image of segmentation;Secondly, medium filtering pretreatment is carried out to the abrasive grain area image of extraction, continues with edge detection and morphological method and eroded area segmentation is carried out to abrasive grain, and extracts the eroded area image of segmentation;Finally, the method counted using area pixel calculates separately abrasive grain region area, eroded area area and abrasive wear rate, completes diamond abrasive grain wear rate and measures.The present invention overcomes the deficiencies of previous artificial qualitatively observation diamond abrasive grain abrasion, realize the degree of wear of quantitative measurment diamond abrasive grain, the accuracy and efficiency of measurement all gets a promotion.
Description
Technical field
The present invention relates to diamond tool Debris Image detection fields, more particularly to a kind of Buddha's warrior attendant based on image procossing
Stone mill grain wear rate assay method.
Background technology
Diamond tool is widely used in the hard brittleness difficulty processing material such as ceramics, optical crystal, semiconductor and hard alloy
The processing of material.In process, diamond abrasive grain and workpiece and chip occur it is complicated cut, plough pears, scratching, impact etc. it is dry
Relate to effect.With the progress of process, diamond abrasive grain will be caused different degrees of abrasion occur.Diamond abrasive grain is in tool
The abrasion condition on surface has important influence to machined surface quality, processing efficiency and life tools etc..In order to keep away as possible
Exempt from diamond abrasive grain too early or heel and toe wear, raising processing quality and processing efficiency, extension diamond tool are processed the service life, needed
The abrasion condition of diamond abrasive grain is measured, process parameter is optimized according to measurement result and improve Buddha's warrior attendant lapicide
Has preparation process.
Currently, the method for commonly measuring diamond abrasive grain abrasion condition is artificial microscopic inspection, artificial microexamination
Method is mainly using microscopic system come the abrasion condition of artificial sampling observation Abrasive Grain in Diamond Tools, in conjunction with what is pre-established
Abrasive wear degree Category criteria, the abrasion classification of artificial observation assessment diamond tool surface sampling abrasive grain and its corresponding mill
Abrasive grain quantity is damaged, diamond abrasive grain abrasion condition is completed and measures.Due to the artificial observation of artificial microscopic inspection needs dependence and in advance
Abrasion Category criteria is first formulated, not only determination efficiency is low for this method, due also to the subjectivity of manual evaluation is strong and causes to measure knot
The accuracy of fruit is not high, it is difficult to accurate evaluation diamond tool effectiveness.
In diamond abrasive grain detection method based on image procossing, Gong Junfeng etc. is proposed based on depth form focus Debris Image
Snake model split plot designs, this method first passes through depth form focus mode and generates the cohesive image of diamond abrasive grain and height matrix,
Diamond abrasive grain image is split using Snake models again.This method is only extracted diamond abrasive grain profile, and adopts
The efficiency that diamond abrasive grain image is generated with depth form focus mode is low.Wu Wenyi etc. proposes the abrasive grain figure based on secondary histogram
As thresholding method, this method has also only divided diamond abrasive grain region, and the image of segmentation still contains certain ambient noise,
The conspicuousness of segmentation is not high, and this method is to be suitable for grey level histogram to have the Debris Image point of apparent peak valley feature
It cuts.In addition, Miao Jingjing etc. proposes the method based on particle swarm optimization algorithm extraction diamond abrasive grain edge, this method is also only real
The extraction at diamond abrasive grain edge is showed.Since there are more complicated background texture, abrasive wear lines for diamond abrasive grain image
Reason and noise etc., existing diamond abrasive grain detection method still concentrate on the extraction segmentation at abrasive grain edge, also fail to effectively
Evaluating abrasive particle abrasion condition.
Invention content
The technical problem to be solved in the present invention is, for the efficiency of artificial microscopy evaluation diamond abrasive grain state of wear
It is low, subjectivity is big, and the diamond abrasive grain detection method based on image procossing is also failed to enough effectively to measure abrasive wear etc. and be asked
Topic provides a kind of determination efficiency and the high diamond abrasive grain wear rate assay method based on image procossing of accuracy.
In order to achieve the object, the present invention adopts the following technical scheme that:
A kind of diamond abrasive grain wear rate assay method based on image procossing, by abrasive grain region segmentation, eroded area point
It cuts and measures three step compositions with abrasive wear rate;
The abrasive grain region segmentation is by the processing of enhancement metal hard rock Debris Image, edge detection and Morphological scale-space group
At, the specific steps are:
1) medium filtering is carried out respectively to the noisy diamond abrasive grain image I (x, y) of gray processing and gaussian filtering pre-processes,
Obtain image I after medium filteringmImage I after (x, y) and gaussian filteringg(x, y) forms enhanced diamond abrasive grain by polymerization
Image Ie(x,y);
The enhancement metal hard rock Debris Image is defined as follows:
2) to enhancement metal hard rock Debris Image Ie(x, y) carries out edge detection, chooses detection threshold value λ, obtains target mill
The contour edge bianry image I of grain imagegb(x,y);
The edge detection is First-order Gradient amplitude detection, and gradient amplitude M (x, y) is defined as:
The detection threshold value λ is adaptive threshold, and threshold value lambda definition is:
In formula (3):M and N is respectively the ranks pixel number of image.
3) the profile side of opening operation that morphological dilations and erosion operator are constituted and closed operation to target Debris Image is utilized
Edge bianry image Igb(x, y) carries out morphologic filtering, removes unrelated background noise and texture edge;
4) holes filling and image cropping function is utilized to detach target abrasive grain, the abrasive grain area image divided;
The eroded area segmentation is made of medium filtering, gradient detection and Morphological scale-space, the specific steps are:
1) medium filtering pretreatment is carried out to the Debris Image of extraction, removal abrasive particle surface draws because of environment such as chip, dusts
The noises such as the random grey white point risen;
2) edge detection is carried out to the pretreated Debris Image of medium filtering, edge detection method and threshold value choose the formula of pressing
(2) it is calculated with formula (3), obtains the contour edge bianry image I of target abrasion imagewb(x,y);
3) utilize the opening operation and closed operation that morphological dilations are constituted with erosion operator to bianry image Iwb(x, y) carries out shape
State filters, and removes unrelated noise;
4) holes filling and image cropping function separation target is utilized to wear, the eroded area image divided;
The abrasive wear measurement is made of calculating abrasive grain region area, eroded area area and abrasive wear rate,
The specific steps are:
1) the abrasive grain area image based on segmentation, the method counted using area pixel calculate abrasive grain region area Sg;Institute
The abrasive grain region area S statedgIt is defined as:
Sg=a × SUMpgFormula (4)
In formula (4):A is the correction factor of real area representated by unit pixel, SUMpgFor total picture contained by abrasive grain region
Element value;If a takes 1, show directly using total pixel value contained by abrasive grain region;
2) the eroded area image based on segmentation, the method counted using area pixel calculate eroded area area Sw;Institute
The eroded area area S statedwIt is defined as:
Sw=a × SUMpwFormula (5)
In formula (5):SUMpwFor total pixel value contained by eroded area;If a takes 1, show directly to use attrition region institute
The total pixel value contained;
3) it is based on abrasive grain region area SgWith eroded area area Sw, calculate abrasive wear rate coefficient K;The abrasive grain mill
Loss rate COEFFICIENT K is defined as:
Compared to the prior art, technical scheme of the present invention has following advantageous effect:
1. the present invention measures three big image procossing steps using abrasive grain region segmentation, eroded area segmentation and abrasive wear rate
Suddenly, diamond abrasive grain wear rate more can be rapidly and accurately measured, the deficiency of artificial microscopy evaluation abrasion method is overcome;
2. the present invention combines the advantages of medium filtering and gaussian filtering, by the diamond abrasive grain image procossing of acquisition at enhancing
Type diamond abrasive grain image, it is suppressed that the influence to abrasive grain region segmentation such as complex background texture reduces segmentation difficulty;
3. the present invention carries out deeper eroded area segmentation to the Debris Image of segmentation, abrasive wear region is improved
The accuracy of segmentation.
Description of the drawings
Fig. 1 is flow chart of the present invention.
Fig. 2 is the diamond abrasive grain image of acquisition.
Fig. 3 is the enhancement metal hard rock Debris Image handled based on Fig. 2.
Fig. 4 is the abrasive grain area image of segmentation.
Fig. 5 is the abrasive wear area image of segmentation.
Fig. 6 is the abrasive wear rate result of image segmentation.
Specific implementation method
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fig. 1 is that the present invention wears assay method flow chart for a kind of diamond abrasive grain based on image segmentation, specifically
Cutting procedure has been described in detail in invention content, no longer describes herein.
A kind of diamond abrasive grain wear rate assay method based on image procossing, by abrasive grain region segmentation, eroded area point
It cuts and measures three step compositions with abrasive wear rate;
The abrasive grain region segmentation is by the processing of enhancement metal hard rock Debris Image, edge detection and Morphological scale-space group
At, the specific steps are:
1) medium filtering is carried out respectively to the noisy diamond abrasive grain image I (x, y) of gray processing and gaussian filtering pre-processes,
Obtain image I after medium filteringmImage I after (x, y) and gaussian filteringg(x, y) forms enhanced diamond abrasive grain by polymerization
Image Ie(x,y);
The enhancement metal hard rock Debris Image is defined as follows:
2) to enhancement metal hard rock Debris Image Ie(x, y) carries out edge detection, chooses detection threshold value λ, obtains target mill
The contour edge bianry image I of grain imagegb(x,y);
The edge detection is First-order Gradient amplitude detection, and gradient amplitude M (x, y) is defined as:
The detection threshold value λ is adaptive threshold, and threshold value lambda definition is:
In formula (3):M and N is respectively the ranks pixel number of image.
3) the profile side of opening operation that morphological dilations and erosion operator are constituted and closed operation to target Debris Image is utilized
Edge bianry image Igb(x, y) carries out morphologic filtering, removes unrelated background noise and texture edge;
4) holes filling and image cropping function is utilized to detach target abrasive grain, the abrasive grain area image divided;
The eroded area segmentation is made of medium filtering, gradient detection and Morphological scale-space, the specific steps are:
1) medium filtering pretreatment is carried out to the Debris Image of extraction, removal abrasive particle surface draws because of environment such as chip, dusts
The noises such as the random grey white point risen;
2) edge detection is carried out to the pretreated Debris Image of medium filtering, edge detection method and threshold value choose the formula of pressing
(2) it is calculated with formula (3), obtains the contour edge bianry image I of target abrasion imagewb(x,y);
3) utilize the opening operation and closed operation that morphological dilations are constituted with erosion operator to bianry image Iwb(x, y) carries out shape
State filters, and removes unrelated noise;
4) holes filling and image cropping function separation target is utilized to wear, the eroded area image divided;
The abrasive wear measurement is made of calculating abrasive grain region area, eroded area area and abrasive wear rate,
The specific steps are:
1) the abrasive grain area image based on segmentation, the method counted using area pixel calculate abrasive grain region area Sg;Institute
The abrasive grain region area S statedgIt is defined as:
Sg=a × SUMpgFormula (4)
In formula (4):A is the correction factor of real area representated by unit pixel, SUMpgFor total picture contained by abrasive grain region
Element value;If a takes 1, show directly using total pixel value contained by abrasive grain region;
2) the eroded area image based on segmentation, the method counted using area pixel calculate eroded area area Sw;Institute
The eroded area area S statedwIt is defined as:
Sw=a × SUMpwFormula (5)
In formula (5):SUMpwFor total pixel value contained by eroded area;If a takes 1, show directly to use attrition region institute
The total pixel value contained;
3) it is based on abrasive grain region area SgWith eroded area area Sw, calculate abrasive wear rate coefficient K;The abrasive grain mill
Loss rate COEFFICIENT K is defined as:
In order to illustrate the effect of the present invention, below by taking the diamond image of acquisition as an example, diamond abrasive grain figure is carried out respectively
Image intensifying, abrasive grain region segmentation, eroded area segmentation and abrasive wear rate determination experiment.
It can be seen that from Fig. 2-4:The background of diamond image is more noisy before segmentation, but after the present invention is divided,
The abrasive grain region of segmentation and the profile of eroded area are more complete, based on segmentation as a result, diamond abrasive grain can be measured quickly
The degree of wear, reach measure diamond abrasive grain wear rate measurement purpose.
The foregoing is merely present pre-ferred embodiments, therefore cannot limit the technical scope of the present invention according to this, therefore Fan Yiben
Equivalent changes and modifications made by the technical spirit and description of invention, in the range of should all belonging to technical solution of the present invention.
Claims (1)
1. a kind of diamond abrasive grain wear rate assay method based on image procossing, it is characterised in that by abrasive grain region segmentation, mill
It damages region segmentation and abrasive wear rate measures three step compositions;
The abrasive grain region segmentation is handled by enhancement metal hard rock Debris Image, edge detection and Morphological scale-space form,
The specific steps are:
1) medium filtering is carried out respectively to the noisy diamond abrasive grain image I (x, y) of gray processing and gaussian filtering pre-processes, obtained
Image I after medium filteringmImage I after (x, y) and gaussian filteringg(x, y) forms enhancement metal hard rock Debris Image by polymerization
Ie(x,y);The enhancement metal hard rock Debris Image is defined as follows:
2) to enhancement metal hard rock Debris Image Ie(x, y) carries out edge detection, chooses detection threshold value λ, obtains target Debris Image
Contour edge bianry image Igb(x,y);
The edge detection is First-order Gradient amplitude detection, and gradient amplitude M (x, y) is defined as:
The detection threshold value λ is adaptive threshold, and threshold value lambda definition is:
In formula (3):M and N is respectively the ranks pixel number of image.
3) contour edge two of opening operation that morphological dilations and erosion operator are constituted and closed operation to target Debris Image is utilized
It is worth image Igb(x, y) carries out morphologic filtering, removes unrelated background noise and texture edge;
4) holes filling and image cropping function is utilized to detach target abrasive grain, the abrasive grain area image divided;
The eroded area segmentation is made of medium filtering, gradient detection and Morphological scale-space, the specific steps are:
1) medium filtering pretreatment is carried out to the Debris Image of extraction, removal abrasive particle surface is caused by the environment such as chip, dust
The noises such as random ash white point;
2) edge detection is carried out to the pretreated Debris Image of medium filtering, edge detection method and threshold value, which are chosen, presses formula (2)
It is calculated with formula (3), obtains the contour edge bianry image I of target abrasion imagewb(x,y);
3) utilize the opening operation and closed operation that morphological dilations are constituted with erosion operator to bianry image Iwb(x, y) carries out morphology
Filtering, removes unrelated noise;
4) holes filling and image cropping function separation target is utilized to wear, the eroded area image divided;
The abrasive wear measurement is made of calculating abrasive grain region area, eroded area area and abrasive wear rate, specifically
Step is:
1) the abrasive grain area image based on segmentation, the method counted using area pixel calculate abrasive grain region area Sg;Described
Abrasive grain region area SgIt is defined as:
Sg=a × SUMpgFormula (4)
In formula (4):A is the correction factor of real area representated by unit pixel, SUMpgFor total pixel value contained by abrasive grain region;
If a takes 1, show directly using total pixel value contained by abrasive grain region;
2) the eroded area image based on segmentation, the method counted using area pixel calculate eroded area area Sw;Described
Eroded area area SwIt is defined as:
Sw=a × SUMpwFormula (5)
In formula (5):SUMpwFor total pixel value contained by eroded area;If a takes 1, show directly to use contained by attrition region
Total pixel value;
3) it is based on abrasive grain region area SgWith eroded area area Sw, calculate abrasive wear rate coefficient K;The abrasive wear rate
COEFFICIENT K is defined as:
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CN113916800A (en) * | 2021-10-08 | 2022-01-11 | 南京航空航天大学 | Detection method for visually judging abrasion of high polymer plastic abrasive |
CN114491836A (en) * | 2021-12-30 | 2022-05-13 | 华侨大学 | Virtual diamond tool generation method based on image processing and data driving |
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