CN105698693B - A kind of egg gas chamber diameter measuring method based on near-infrared laser image - Google Patents
A kind of egg gas chamber diameter measuring method based on near-infrared laser image Download PDFInfo
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- CN105698693B CN105698693B CN201610180628.3A CN201610180628A CN105698693B CN 105698693 B CN105698693 B CN 105698693B CN 201610180628 A CN201610180628 A CN 201610180628A CN 105698693 B CN105698693 B CN 105698693B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 230000011218 segmentation Effects 0.000 claims abstract description 8
- 238000003672 processing method Methods 0.000 claims abstract description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000012821 model calculation Methods 0.000 claims description 2
- 238000009659 non-destructive testing Methods 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 description 3
- 239000000284 extract Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 102000002322 Egg Proteins Human genes 0.000 description 2
- 108010000912 Egg Proteins Proteins 0.000 description 2
- 210000003278 egg shell Anatomy 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/12—Measuring arrangements characterised by the use of optical techniques for measuring diameters internal diameters
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3563—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing solids; Preparation of samples therefor
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/359—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using near infrared light
-
- 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
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention discloses a kind of egg gas chamber diameter measuring method based on near-infrared laser image, belongs to computer vision field of non destructive testing.A kind of egg gas chamber image collecting device being made of infrared laser, ferrous metal pipe, egg tray, near-infrared camera and camera bellows and corresponding gas chamber image-pickup method are this method provide, is additionally provided comprising image median filter, the extraction of 64 rank grey level histograms, automatic Two-peak method Threshold segmentation, the connected region for removing all non-maximum areas, the image processing method for calculating gas chamber bianry image area and the method for calculating egg gas chamber diameter.This method can rapidly and accurately measure the gas chamber diameter of egg, lay a good foundation to detect research based on the egg freshness of gas chamber feature.
Description
Technical field：
The invention belongs to computer vision field of non destructive testing, more particularly to a kind of egg based on near-infrared laser image
Gas chamber diameter measuring method.
Background technology：
Egg nutrient enriches, is cheap, deep to be welcome by consumers in general.As the growth of storage time, egg are new
Freshness, nutritive value and edible safety all can be reduced gradually.Egg gas chamber be egg exclude hen it is external after, its content by
The hollow region shunk and formed in egg major part is reduced in temperature.As egg storage time increases the decline with freshness,
Original moisture is evaporated by eggshell stomata in egg, and partial content thing is decomposed by the microorganisms as CO2Overflowed, led by stomata with moisture
Content is caused further to shrink, gas chamber becomes larger.Gas chamber size is the important parameter in egg freshness Non-Destructive Testing, very much
The method of egg freshness Non-Destructive Testing is all using gas chamber size as primary evaluation index.
Air room height is the current common counter of evaluation of egg gas chamber size, but gas chamber is distributed not in egg stub end
Uniformity causes larger in the air room height difference observed by different directions, and air room height measures easy camera subject shooting angle
The influence of degree, the air room height of measurement are unable to the gas chamber size of actual response egg.From egg stub end during gas chamber, gas chamber
It is approximately circular, in contrast, the influence factor suffered by the diameter evaluation egg gas chamber size of gas chamber is smaller, more can be objectively anti-
The size of egg gas chamber is answered, so as to more accurately evaluate egg freshness.In the case where gas chamber is illuminated by light source, pen can be used
Describe the shape of egg gas chamber, then with its diameter of vernier caliper measurement, but since egg individual difference is larger, eggshell translucency
Different, realizing egg gas chamber diameter, detection is more difficult automatically, and correlation method also has no report.
Therefore, establish that to be capable of the method for Non-Destructive Testing egg gas chamber automatically be that current this area researcher needs to solve
Technical problem.
The content of the invention：
The object of the present invention is to provide one kind to measure egg gas chamber diameter method, and the gas chamber that this method can measure egg is straight
Footpath.
To solve the above problems, the present invention provides a kind of egg gas chamber diameter measurement side based on near-infrared laser image
Method, measuring process for first with near-infrared laser picture system according to gas chamber image-pickup method obtain image, then by image at
Reason method obtains gas chamber bianry image area, finally obtains egg gas chamber diameter using Model Calculating Method, it is characterised in that：
1) near-infrared laser picture system, includes 50mW 980nm circular light spots near infrared lasers (1), ferrous metal pipe
(2), egg tray (4), near-infrared camera (5) and camera bellows (6), wherein, near infrared laser (1) and vertical direction angle are 30 °；
Ferrous metal bore 4mm, outside diameter 6mm are connected on the light hole of near infrared laser (1), and parallel near infrared laser
(1), make the laser that laser projects can be to pass through ferrous metal pipe (2), ferrous metal pipe (2) end is horizontal cut, notch
Surrounding pastes one layer of black flannelette of ring-type with light leakage；Egg tray (4) is located at below ferrous metal pipe horizontal cut at 5cm, and can on
Lower each 5mm of movement, to adapt to different size of egg (3)；Near-infrared camera (5) sensitive volume arrives 1000nm for 800, and 130
Ten thousand pixel black and white near-infrared cameras, focal length 20cm, at the surface 20cm of egg (3)；Camera bellows (6) is impermeable light box
Body, covers on outside device, provides dark situation for Image Acquisition, and provide support for each component；
2) gas chamber image-pickup method is：Egg (3) major part is positioned in egg tray (4) upwards, moves up and down egg tray
(4), egg (3) stub end center is close to the end of ferrous metal pipe (2), then open near infrared laser (1), near-infrared
Laser (1) sends a branch of wavelength and impinges upon egg (3) stub end center through ferrous metal pipe (2) for 980nm infrared lights, then
Image is gathered with near-infrared camera (5), you can obtains clearly egg gas chamber image；
3) image processing method is：5 × 5 medium filtering denoisings first are carried out to image, then extract the original ash of 256 rank of image
Histogram is spent, and every 4 rank in former histogram is divided into one group, the average value of capture vegetarian refreshments number is the pixel value of the rank, is obtained
64 rank grey level histograms of image, then travel through backward since first point of 64 rank grey level histogram, if after put corresponding pixel
When point number is more than current point, preceding point is the starting point at a peak, then is traveled through backward since next point of the point, if rear point pair
Pixel number is answered to be more than current point, then current point is the end point at peak, and rear point is the starting point at next peak, is followed in the method
Traveled through after circumferential direction, until histogram end, obtain the starting point and end point at all peaks, then traversal finds out the summit correspondence at each peak
Exponent number and its pixel value, then all peaks are numbered, and sort by the pixel value of each peak summit to each peak, obtain second and the 3rd
The corresponding exponent number a and b of summit at a peak, then travels through gray value in (a+1) × 4 from the original 256 rank grey level histogram of image
Region between (b-1) × 4, finds out the gray value of pixel number minimum as segmentation threshold, and with the threshold value to original gas
Room carrying out image threshold segmentation, obtains the bianry image of the gas chamber containing noise, and then each connected domain in gas chamber bianry image is carried out
Mark, and each connected domain area is calculated, the connected domain area of maximum is found out, then all connected domains less than the area are removed,
The bianry image of gas chamber is obtained, and seeks its area S；
4) Model Calculating Method is：Model calculation formula is：Wherein S is egg gas chamber binary map
The area of picture, d are egg gas chamber diameter.
Brief description of the drawings：
Fig. 1：Egg gas chamber image collecting device
Fig. 2：The original gas chamber image of egg
Fig. 3：256 rank grey level histograms
Fig. 4：64 rank grey level histograms
Fig. 5：Gas chamber bianry image
Embodiment：
The object of the present invention is to provide one kind to measure egg gas chamber diameter method, and the gas chamber that this method can measure egg is straight
Footpath, obtains the parameter for more objectively describing gas chamber size.
In order to make those skilled in the art more fully understand the present invention program, with reference to embodiment to the present invention
It is described in further detail.
In a kind of specific embodiment, the gas chamber diameter of egg is measured.Egg (3) major part is positioned over upwards first near red
In the egg tray (4) of outer laser image system, egg tray (4) is moved up and down, egg (3) stub end center is close to ferrous metal pipe
(2) end, then opens near infrared laser (1), it is 980nm infrared lights that near infrared laser (1), which sends a branch of wavelength,
Egg (3) stub end center is impinged upon through ferrous metal pipe (2), then original egg gas is obtained with near-infrared camera collection picture
Room image.Then 5 × 5 medium filterings are carried out to egg gas chamber image, and extracts 256 rank original gradation histogram of image.By original
Every 4 rank is divided into one group in beginning histogram, and the pixel value that the average value of capture vegetarian refreshments number is the rank, you can obtains 64 ranks of image
Grey level histogram, then travels through backward since first point of the histogram, if after put corresponding pixel number and be more than current point
When, preceding point is the starting point at a peak, then is traveled through backward since next point of the point, if point corresponding pixel points number is more than afterwards
Current point, then current point is the end point at peak, and rear point is the starting point at next peak, is further continued for traveling through, until histogram end, obtains
To the starting point and end point at all peaks, then traversal finds out the corresponding exponent number of summit and its pixel value at each peak, then by all peaks
Numbering, and sort by the pixel value of each peak summit to each peak, the corresponding exponent number a and b of summit at second and the 3rd peak is obtained, so
Gray value region between (a+1) × 4 and (b-1) × 4 is traveled through from the original 256 rank grey level histogram of image afterwards, finds out pixel
The gray value of point number minimum is obtained containing noise original gas chamber carrying out image threshold segmentation as segmentation threshold, then with the threshold value
The bianry image of gas chamber, is then marked each connected domain in image, calculates each connected domain area, and finds out maximum
Connected domain area, then all connected domains less than the area are removed, the bianry image of gas chamber is obtained, and calculate discharge chamber binary map
The area S of picture, brings model calculating formula intoIn obtain the gas chamber diameter d of egg.
Embodiment
The extraction of egg gas chamber diameter：Egg to be measured (3) major part is positioned over near-infrared laser picture system upwards first
Egg tray (4) on, move up and down egg tray (4), egg (3) stub end center is close to the end of ferrous metal pipe (2), then beat
Near infrared laser (1) is driven, near infrared laser (1) sends a branch of wavelength and passes through ferrous metal pipe (2) for 980nm infrared lights
Egg (3) stub end center is impinged upon, then original egg gas chamber image is obtained with near-infrared camera collection picture, as shown in Figure 2.
Then 5 × 5 medium filterings are carried out to egg gas chamber image, and extracts 256 rank original gradation histogram of image, such as schemed
Shown in 3.Every 4 rank in original histogram is divided into one group, and the pixel value that the average value of capture vegetarian refreshments number is the rank, schemed
64 rank grey level histograms of picture, as shown in Figure 4.
Then traveled through backward since first point of the histogram, if after when putting corresponding pixel number and being more than current point,
Preceding point is the starting point at a peak, then is traveled through backward since next point of the point, works as if putting corresponding pixel points number afterwards and being more than
Preceding, then current point is the end point at peak, and rear point is the starting point at next peak, is further continued for traveling through, until histogram end, obtains
The starting point and end point at all peaks, then traversal finds out the corresponding exponent number of summit and its pixel value at each peak, then all peaks are compiled
Number, and sort by the pixel value of each peak summit to each peak, obtain second and the corresponding exponent number of summit at the 3rd peak be 7 and 15,
Then gray value region between 32 and 56 is traveled through from the original 256 rank grey level histogram of image, is found out when gray value is 39,
Corresponding pixel points number is minimum, that is, it is 39 to draw optimal segmenting threshold.
The egg gas chamber image with noise is obtained to original gas chamber carrying out image threshold segmentation with optimal threshold 51 again, it is then right
Each connected domain is marked in image, calculates each connected domain area, and finds out the connected domain area of maximum, then removes and be less than
All connected domains of the area, obtain the bianry image of gas chamber, as shown in figure 5, and gas chamber bianry image area is calculated being
27319 pixels.
Finally bring gas chamber bianry image area into model calculating formulaObtaining gas chamber diameter d is
25.7mm, error only has 2.3% compared with vernier caliper measured value 26.3mm.
Claims (1)
1. a kind of egg gas chamber diameter measuring method based on near-infrared laser image, its measuring process is first to use near-infrared laser
Picture system obtains image according to gas chamber image-pickup method, then obtains gas chamber bianry image area by image processing method,
Finally egg gas chamber diameter is obtained using Model Calculating Method, it is characterised in that：
1) near-infrared laser picture system, comprising 50mW 980nm circular light spots near infrared lasers (1), ferrous metal pipe (2),
Egg tray (4), near-infrared camera (5) and camera bellows (6), wherein, near infrared laser (1) and vertical direction angle are 30 °；Black
Metal bore 4mm, outside diameter 6mm are connected on the light hole of near infrared laser (1), and parallel near infrared laser (1),
Make the laser that laser projects can be to pass through ferrous metal pipe (2), ferrous metal pipe (2) end is horizontal cut, around notch
One layer of black flannelette of ring-type is pasted with light leakage；Egg tray (4) is located at below ferrous metal pipe horizontal cut at 5cm, and can transport up and down
Each 5mm is moved, to adapt to different size of egg (3)；Near-infrared camera (5) sensitive volume arrives 1000nm, 1,300,000 pictures for 800
Plain black and white near-infrared camera, focal length 20cm, at the surface 20cm of egg (3)；Camera bellows (6) is light tight babinet,
Cover on outside device, provide dark situation for Image Acquisition, and support is provided for each component；
2) gas chamber image-pickup method is：Egg (3) major part is positioned in egg tray (4) upwards, egg tray (4) is moved up and down, makes
The end of ferrous metal pipe (2) is close at egg (3) stub end center, then opens near infrared laser (1), near infrared laser
(1) send a branch of wavelength and impinge upon egg (3) stub end center through ferrous metal pipe (2) for 980nm infrared lights, then with closely red
Outer camera (5) gathers image, you can obtains clearly egg gas chamber image；
3) image processing method is：5 × 5 medium filtering denoisings first are carried out to image, it is straight then to extract 256 rank original gradation of image
Fang Tu, and every 4 rank in former histogram is divided into one group, is divided into 64 groups, takes the average value of every group of pixel number, then with obtaining
Each group mean pixel point numerical value drawing image 64 rank grey level histograms, then from 64 rank grey level histogram first point open
Beginning travels through backward, if after when putting corresponding pixel number and being more than current point, preceding point is the starting point at a peak, then under the point
One point starts to travel through backward, if point corresponding pixel points number is more than current point afterwards, current point is the end point at peak, and rear point is
The starting point at next peak, circulates travel through backward in the method, until histogram end, obtains starting point and the end at all peaks
Point, then traversal finds out the corresponding exponent number of summit and its pixel value at each peak, then all peaks are numbered, and by the picture of each peak summit
Element value sorts each peak, the corresponding exponent number a and b of summit at second and the 3rd peak is obtained, then from the original 256 rank gray scale of image
Gray value region between (a+1) × 4 and (b-1) × 4 is traveled through in histogram, finds out the gray value conduct of pixel number minimum
Segmentation threshold, and the bianry image of the gas chamber containing noise is obtained, then to gas to original gas chamber carrying out image threshold segmentation with the threshold value
Each connected domain is marked in the bianry image of room, and calculates each connected domain area, finds out the connected domain area of maximum, then goes
Except all connected domains less than the area, the bianry image of gas chamber is obtained, and seeks its area S；
4) Model Calculating Method is：Model calculation formula is：Wherein S is the face of egg gas chamber bianry image
Product, d is egg gas chamber diameter.
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| CN111014969B (en) * | 2019-12-29 | 2022-03-25 | 上海赛摩电气有限公司 | Automatic change egg broken wall special plane |
| CN111037102B (en) * | 2019-12-29 | 2021-10-29 | 上海赛摩电气有限公司 | Automatic egg shelling method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101672839A (en) * | 2009-09-25 | 2010-03-17 | 南京农业大学 | Device and method for detecting hatching egg incubation quality based on computer vision |
| CN102147402A (en) * | 2011-03-08 | 2011-08-10 | 江苏大学 | Machine vision technology based method for rapidly detecting egg freshness |
| CN102169092A (en) * | 2011-01-11 | 2011-08-31 | 西安理工大学 | Method for testing poultry egg freshness based on photon radiation |
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| JP2001017020A (en) * | 1999-07-09 | 2001-01-23 | Seiichi Kitamura | Distinguishing device for class and freshness of egg |
| JP4674685B2 (en) * | 2004-08-02 | 2011-04-20 | 有限会社ハイ・サーブ | Chicken egg freshness detection method and apparatus by impedance sensing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101672839A (en) * | 2009-09-25 | 2010-03-17 | 南京农业大学 | Device and method for detecting hatching egg incubation quality based on computer vision |
| CN102169092A (en) * | 2011-01-11 | 2011-08-31 | 西安理工大学 | Method for testing poultry egg freshness based on photon radiation |
| CN102147402A (en) * | 2011-03-08 | 2011-08-10 | 江苏大学 | Machine vision technology based method for rapidly detecting egg freshness |
Non-Patent Citations (1)
| Title |
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| 傅里叶变换近红外反射用于鸡蛋蛋品质的研究;候卓成等;《光谱学与光谱分析》;20090831;第29卷(第8期);第2063-2066页 * |
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Effective date of registration: 20230609 Address after: 750000 West of Jinshan Village, Hongguang Town, Helan County, Yinchuan, Ningxia (east foot of Helan) Patentee after: NINGXIA JIUSANLING ECOLOGICAL AGRICULTURE AND ANIMAL HUSBANDRY CO.,LTD. Address before: Nanjing City, Jiangsu Province, No. 1 210095 Weigang Patentee before: NANJING AGRICULTURAL University |