CN102495063A - Method for evaluating washing wear of fabric on basis of machine vision - Google Patents
Method for evaluating washing wear of fabric on basis of machine vision Download PDFInfo
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- CN102495063A CN102495063A CN2011104071888A CN201110407188A CN102495063A CN 102495063 A CN102495063 A CN 102495063A CN 2011104071888 A CN2011104071888 A CN 2011104071888A CN 201110407188 A CN201110407188 A CN 201110407188A CN 102495063 A CN102495063 A CN 102495063A
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Abstract
The invention relates to a method for evaluating the washing wear of a fabric on the basis of the machine vision, aiming at realizing accurate and objective evaluation of the washing wear of the fabric in the washing process. The method for evaluating the washing wear of the fabric on the basis of the machine vision is realized by cooperation of a hardware part and a software part. The hardware part can be used for realizing high precision acquisition of worn fabric sample images. The software part can be used for realizing acquisition, storage and cutting of the actual images, partitioning of the images and calculation of a washing wear evaluation parameter. In the method, the worn fabric is respectively shot before and after being washed; the sizes of the areas of the worn fabric in the worn fabric sample images before and after the worn fabric is washed are calculated; and the area change rate, i.e. a wear value, is calculated and is used for evaluating the washing wear seriousness as the parameter. Due to the adoption of the method, the difficulties that under the condition that the worn fabric is of an irregular shape after being washed, when a manual method is adopted, an error is brought to the size measurement of a worn fabric sample and the area cannot be accurately calculated are solved.
Description
Technical field
The present invention relates to a kind of fabric washing wear evaluation method based on machine vision; Adopt this method can accurately calculate " AS/NZS2040.1:2005 Performance of household electrical appliances-Clothes washing machines Part 1:Methods for measuring performance; Energy and water consumption " in the area of erose fabric abrasion cloth after the washing of appendix G regulation, and then calculate washing wear evaluation index washing wearing valve.The method that this invention proposes is more objective, accurate than the manual measurement method that washing machine manufacturer generally adopts, and can effectively reduce test error.
Background technology
The fabric washing wear evaluation is to test through a kind of accelerated wear test to measure the method for evaluating performance of washing machine to the cleanup action intensity of fabric, and its evaluation index wearing valve can reflect the abrasion condition of washing process to fabric.Therefore, the fabric washing wear evaluation is washing machine manufacturer requisite test index to washing machine performance evaluation the time.Existing method of testing be calculate the wearing and tearing cloth sample after wipe out on damaged limit according to the method for appendix G regulation in " AS/NZS 2040.1:2005 Performance of household electrical appliances-Clothes washing machines Part 1:Methods for measuring performance, energy and water consumption " area relatively the minimizing ratio of its initial area as wearing valve.Wherein, wearing and tearing initial specimen length of cloth and width are 10 centimetres all, are the squares of a rule.And after the washing, the sample edge comes off, and specimen shape may become irregular after pruning.Therefore, irregularly shaped sample planimeter is counted as to calculating the difficult problem of wearing valve.The method of machine vision is adopted in this invention, can accurately calculate the area that washs back wearing and tearing cloth sample through image segmentation, avoids the error of manual measurement.
Summary of the invention
The present invention relates to a kind of fabric washing wear evaluation method, realize the meticulous objective evaluation of washing wearing and tearing in the fabric washing process based on machine vision.Fabric washing wear evaluation method based on machine vision will realize through hardware components and software section cooperation; Hardware components should realize the wearing and tearing high precision of cloth Sample Image is obtained; Software section can real world images obtain, preservation, cutting, and the cutting apart and wash the wear evaluation CALCULATION OF PARAMETERS of image.In the method, taken pictures in wearing and tearing cloth washing front and back respectively, the size of cloth area of wearing and tearing in the wearing and tearing cloth Sample Image before and after the calculating washing, and then calculate area change rate, promptly wearing valve is washed serious wear property as parameter evaluation.This method has overcome under wearing and tearing cloth out-of-shape situation after the washing, adopts the accurately difficult problem of reference area of sum of errors that manual method brings wearing and tearing cloth sample measurement size.
Hardware components should realize the wearing and tearing high precision of cloth Sample Image is obtained, it mainly by industrial video external member (1), light source (2), data transmission wires (3), main frame (4), display (5), light source controller (6) and sample place, industrial video external member and light source install the sample bench (7) of usefulness.
Industrial video external member (1) is made up of face battle array colorful CCD camera, data line and capture card, is the Primary Component that wearing and tearing cloth image is gathered.Wherein, area array CCD resolution is 2048 * 2048 pixels.
Light source (2) and light source controller (6) are used, when satisfying the collection of wearing and tearing cloth Sample Image, and the specimen surface brightness requirement.Light source controller (6) can be regulated the brightness of light source.Wherein, light source (2) should be the LED strip source, uses in pairs, and light source length is 60 centimetres, and LED row number is 6 rows in the single source.
Software section is a kind of computer program, can be used with hardware components, obtains Sample Image, calculates the size of wearing and tearing cloth area in the washing front and back wearing and tearing cloth Sample Image, calculates area change rate, and promptly wearing valve is as parameter evaluation washing serious wear property.In software section; Washing wearing and tearing cloth image analytic function can be realized through programming development environment; For example the programming of MATLAB, Microsoft Visual C++, Microsoft Visual Basic and Delphi realizes, also can carry out secondary development through the digital imaging processing software of special use and realize.
Description of drawings
Schematically provided the main example of technology implementation mode of the present invention in the accompanying drawings, wherein,
Fig. 1, washing back wearing and tearing cloth Sample Image;
Fig. 2, washing back wearing and tearing cloth sample is cut apart the back image;
Fig. 3, hardware mechanism partly form synoptic diagram;
Fig. 4, software section major function synoptic diagram.
Embodiment
According to " AS/NZS 2040.1:2005 Performance of household electrical appliances-Clothes washing machines Part1:Methods for measuring performance; Energy and water consumption " require to confirm washing test condition and material specification requirement in the appendix A, B, C, formulate the experimental test scheme.Wherein, every wearing and tearing cloth all adopts NI Vision Builder for Automated Inspection shown in Figure 3 to take pictures before washing.Dry naturally wearing and tearing cloth sample washing back, and adopt flatiron pressing back to adopt NI Vision Builder for Automated Inspection shown in Figure 3 to take pictures.Suppose that the preceding wearing and tearing of washing cloth is ideal model, initial specimen length and width are 10 centimetres all, are squares, and its area is 10000 square millimeters.To wearing and tearing cloth sample collection image before washing, and cut apart.Suppose that the area of the sample grey scale pixel value is 1, non-area of the sample grey scale pixel value is 0.After then can computed segmentation in the image pixel value be 1 pixel number as the washing of wearing and tearing cloth before area A
0Suppose washing back sample, as shown in Figure 2 after cutting apart, comprising numerical value after the computed segmentation in the image in the area of the sample and be 1 number of pixels is A
1, then washing back wearing and tearing cloth sample area can be used A
1Expression.Then wearing valve η can be expressed as formula (1)
In formula (1), η is big more before and after the same sample washing, explains that the sample wearing and tearing are serious more.
In NI Vision Builder for Automated Inspection shown in Figure 3, camera is through after demarcating, and when straight length was 1 centimetre, its length direction comprised 72 pixels, is 1 centimetre and 72 pixel equivalences at the physical size engineer's scale promptly.According to 1 centimetre and 72 pixel equivalences, can be by comprising the washing front and back wearing and tearing cloth sample real area A that the pixel number is tried to achieve in the wearing and tearing cloth sample
0And A
1, can calculate sample real area and wearing valve η.
According to " AS/NZS 2040.1:2005 Performance of household electrical appliances-Clothes washing machines Part1:Methods for measuring performance; Energy and water consumption " require to confirm washing test condition and material specification requirement in the appendix A, B, C, formulate the experimental test scheme.In testing scheme; Select the family expenses roller washing machine; Its maximum washing capacity is 8KG; Washing mode is for expressing 30 minutes, and loadtype is referring to " AS/NZS 2040.1:2005 Performance of household electrical appliances-Clothes washing machines Part 1:Methods for measuring performance, energy and water consumption " appendix C requirement.When selecting load weight to be 4KG, washing wearing and tearing cloth coupon number is 15, and it is numbered referring to table 1.Wearing and tearing cloth specification is: " thorn of イ Application デ イ ア Application Network ロ ス COSMO 1100 cotton 100% color no.11 width 91.4cm length 30m ゆ う cloth ".Concrete washing parameter is: wash temperature is 30 ℃, washs 1 time, and rinsing 3 times is dewatered 1 time, and dehydrating speed is 800rpm, and total wash time is 34min.Adopt NI Vision Builder for Automated Inspection shown in Figure 3,, and cut apart, calculate sample and wash preceding area wearing and tearing cloth sample collection image before washing.Equally, calculate washing back sample area, and calculate wearing valve η according to formula (1), as shown in table 1.
Table 1 washing machine expresses 3 Wear Test Data of 30 rinsings
Claims (7)
1. the fabric washing wear evaluation method based on machine vision will realize through hardware components and software section cooperation; Hardware components should realize the wearing and tearing high precision of cloth Sample Image is obtained, it mainly by industrial video external member (1), light source (2), data transmission wires (3), main frame (4), display (5), light source controller (6) and sample place, industrial video external member and light source install the sample bench (7) of usefulness.Software section can real world images obtain, preservation, cutting, and the cutting apart and wash the wear evaluation CALCULATION OF PARAMETERS of image.
2. according to claim 1, industrial video external member (1) should comprise face battle array colorful CCD camera, data line and capture card at least.Wherein, area array CCD resolution is not less than 2048 * 2048 pixels.
3. according to claim 1, light source (2) and light source controller (3) are used, in the time of should satisfying the collection of washing wearing and tearing cloth Sample Image, and the specimen surface brightness requirement.Light source controller (6) should be regulated the brightness of light source.Wherein, light source (2) should be the LED strip source, uses in pairs, and light source length is not less than 50 centimetres, and LED is no less than 4 rows in the single source.
4. according to claim 1; Main frame (4) should be furnished with industrial video external member IMAQ card slot or interface; At least can image pick-up card be connected with computer motherboard through a kind of mode in VGA interface, DVI interface, USB interface, 1394 interfaces or PCI slot, PCI-E slot, ISA slot, the AGP slot, realize the collection and the demonstration of image.
5. according to claim 1 and claim 4, industrial video external member (1) and main frame (4) should interconnect through data transmission wires (3) with display (5), and wherein, display (5) should be color monitor, can show the RGB coloured image.
6. according to claim 1 and claim 5, in hardware system, have two single data transfer wires (2) at least, can realize respectively that image is from industrial video external member (1) to main frame (4) with the transmission of image information from main frame (4) to display (5).
7. according to claim 1, hardware components should comprise sample bench (7), and it can be used for mounting industrial video external member (1) and light source (2), and the washing wearing and tearing cloth sample that need take pictures of placement.Wherein, the sample bench of placing the sample part be square, and size is 3 times of small sample area not.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243849A (en) * | 2019-05-05 | 2019-09-17 | 浙江乌镇街科技有限公司 | A kind of ostensibly detection method of polyester filament |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243849A (en) * | 2019-05-05 | 2019-09-17 | 浙江乌镇街科技有限公司 | A kind of ostensibly detection method of polyester filament |
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Application publication date: 20120613 |