CN103760162A - Test device and method of multi-directional wrinkle recovery performance of fabric - Google Patents
Test device and method of multi-directional wrinkle recovery performance of fabric Download PDFInfo
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- CN103760162A CN103760162A CN201410024076.8A CN201410024076A CN103760162A CN 103760162 A CN103760162 A CN 103760162A CN 201410024076 A CN201410024076 A CN 201410024076A CN 103760162 A CN103760162 A CN 103760162A
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Abstract
The invention relates to a test device and method of multi-directional wrinkle recovery performance of fabric. The device comprises a multi-directional fabric wrinkling device and a fabric wrinkling image obtaining and processing device. The method comprises the following steps: enabling the fabric to produce multi-directional wrinkles through a banding method, obtaining a fabric wrinkling image through a scanner or a digital camera, and then firstly pre-processing the obtained fabric wrinkling image through an image processing technology by using a computer, wherein the pre-processing step comprises graying color image, performing enhancement processing on contrast and denoising; and performing wavelet decomposition on the pre-processed fabric wrinkling image by using the wavelet analysis technology, and extracting the decomposed horizontal detail standard deviation, vertical detail standard deviation and opposite angle detail standard deviation at each layer, wherein the total standard deviation of the directions is taken as an evaluation index, the greater the total standard deviation of the fabric is, the worse the anti-wrinkle performance is. The index reflecting the anti-wrinkle performance of the fabric is obtained through the image processing, and the device and method have the advantages of being accurate and convenient, good in repeatability, time-saving and labor-saving and cost-saving.
Description
Technical field
The invention belongs to textile garment performance test field, relate in particular to the multi-direction crease recovery system safety testing device of a kind of fabric and method.
Background technology
Wrinkle resistance refers to the ability of the scuffing that fabric opposing external force causes.Wrinkle resistance typically refers to the reply degree that produces under external force folding line, is called again wrinkle (folding line) recovery.The quality of crease recovery is directly connected to outward appearance and the flatness of fabric, to its carry out accurately test and objective evaluation extremely important.Common method of testing has crease recovery horn cupping and wring method.The former replys angle by measuring after fabric folded exerting pressure; The latter is by the compression that rotates a circle of upper and lower fabric both sides, except pressing postpone, evaluates wrinkle grade.
All there is certain problem in these two kinds of methods: the wrinkle of fabric have obvious anisotropy, crease recovery horn cupping only produces the wrinkle of single direction, and only with the creasy recovery angle of fabric longitude and latitude both direction, characterize the wrinkle resistance of monoblock fabric, obviously do not there is science and rationality.The folding line parallel to each other along fabric along the bias direction that wring method causes when producing and wringing out after similar clothes are washed, has only reflected the wrinkle performance of fabric along the bias direction.These two kinds of methods all can not characterize the comprehensive crease recovery of fabric all directions obviously.
Summary of the invention
The object of the invention is to the problem existing in the test of above crease recovery of fabrics, provide a kind of proving installation and method of testing that can the multi-direction crease recovery of concentrated expression fabric.
Above-mentioned technical purpose of the present invention is achieved through the following technical solutions: the multi-direction crease recovery system safety testing device of fabric, comprises obtaining and treating apparatus of the multi-direction wrinkling device of fabric and fabric pincher image.Wherein the multi-direction wrinkling device material requested of fabric has bead and bungee, and bungee is used for tying up the fabric that has wrapped up bead, by bead and bungee, is jointly played fabric is applied to the effect from multiple different directions external force, makes fabric produce divergent shape folding line; The acquisition device of fabric pincher image is digital camera or scanner, and the treating apparatus of fabric pincher image is computing machine.
Fabric is produced after multi-direction wrinkle by strapping, with scanner or digital camera, obtain fabric pincher image again, then with computing machine, by image processing techniques, first the fabric pincher image obtaining is carried out to pre-service, comprise: coloured image gray processing, contrast enhancement processing and denoising, then utilize wavelet analysis technology to carry out wavelet decomposition to the fabric pincher image after pre-service, and each layer of level detail standard deviation after extraction decomposition, vertical detail standard deviation, with diagonal detail standard deviation, and by total standard deviation of above three directions as evaluation index, total large fabric of standard deviation, crease-resistant ability.
Beneficial effect of the present invention: the crease-resistant ability that can only obtain fabric single direction for existing crease recovery of fabrics method of testing, can not characterize the multi-direction comprehensive wrinkle performance of fabric, design a set of proving installation that can the multi-direction crease recovery of test fabric, and by image processing, obtain reflecting the index of wrinkle resistance in fabrics, have accurate convenience, favorable repeatability, time saving and energy saving, save the advantages such as cost.
Accompanying drawing explanation
The multi-direction process for creping of Fig. 1 fabric and device vertical view;
The multi-direction process for creping of Fig. 2 fabric and device front view (FV);
The multi-direction crease recovery wrinkle resistance of Fig. 3 fabric proving installation;
The principle of wavelet analysis of Fig. 4 fabric pincher image.
Embodiment
By the following examples, and by reference to the accompanying drawings, technical scheme of the present invention is further described in detail.
The multi-direction wrinkling device material requested of fabric has bead, ties up with bungee the hollow tubular slightly larger than the small ball's diameter etc.The acquisition device of fabric pincher image is digital camera or scanner, and the treating apparatus of fabric pincher image is computing machine, and wherein the bead in the present embodiment is the spheroid of 1.5 centimetres of diameters.
Wrinkle resistance in fabrics method of testing of the present invention comprises the following steps:
(1) fabric 1 to be measured is pressed smooth after, be cut into given size (in the present embodiment, sample is of a size of 15 × 15cm); And put on broadwise mark 2 and warp-wise mark 3;
(2) fabric to be measured 1 after cutting is placed on to the upper surface of hollow steel pipe 4, and bead 5 is put in to the center of square fabric, i.e. the intersection point place of mark line 2 and 3, as shown in Figure 1;
(3) the move up bungee 6 at the outer wall place (apart from coboundary 1 centimeters) that is enclosed within hollow steel pipe 4, by the movement of bungee 6, make fabric 1 evenly wrap bead 2, with bungee 6, the fabric that encases bead is tied up solid again, note every fabric to tie up the number of turns unified, by bead and bungee, fabric is applied to the effect from multiple different directions external force, make fabric produce divergent shape folding line and make fabric produce the radial folding line of being dispersed by middle mind-set surrounding;
(4) tie up the set time after (the present embodiment is 2 minutes), bungee is cut off with scissors, and fabric is spread out by the light gesture of trying one's best;
(5) wrinkle fabric is put into scanner 7 and scan, while noting scanning, do not have pressure to make fabric pincher produce distortion;
(6) to the wrinkle image input computing machine 8 after scanning, and carry out following pre-service:
The first step, becomes unified size by the image cropping obtaining, and coloured image is converted into gray level image.
Second step, strengthens picture contrast.Adopt the method for gray scale linear transformation to strengthen dynamically the contrast of image, can make the tonal range of image dynamically strengthen, the contrast of image is effectively expanded, and makes image more clear, and concrete steps are:
1. draw the histogram of gray level image, by histogram, observe the intensity profile situation of image, determine the gray level interval that needs conversion;
2. utilize the contrast of the method stretching image of linear transformation, change the intensity profile scope of image, outstanding interested region, suppresses uninterested region, shows the image after linear transformation.
3. image denoising.Select the method for wavelet packet denoising to suppress the noise in image, this kind of method can be removed the high-frequency information that noise also can retain image.
(7) use wavelet analysis technology to carry out the decomposition of the different numbers of plies to pretreated fabric pincher image, as shown in Figure 4, the principle of wavelet analysis is that picture breakdown is become to low frequency and HFS, wherein low frequency part has reflected the principal character of image, and the not details of presentation video of HFS, Fig. 4 (a) represents fabric pincher image, Fig. 4 (b) represents through one deck wavelet decomposition, cA is approximation coefficient, it represents the low-frequency component of horizontal and vertical directions, its excess-three number of sub images is detail coefficients, wherein cH1 is level detail coefficient, represent the radio-frequency component of horizontal direction and the low-frequency component of vertical direction, cV1 is vertical detail coefficient, represents the radio-frequency component of vertical direction and the low-frequency component of horizontal direction, cD1 is diagonal detail coefficient, represents the radio-frequency component of horizontal and vertical direction.Wherein approximation coefficient cA can carry out again 2 grades of decomposition, as shown in Figure 4 (c), can also proceed 3 grades, 4 grades ... wavelet decomposition.
(8) extract level detail coefficient standard deviation, vertical detail coefficient standard deviation and the diagonal detail coefficient standard deviation of each decomposition level, by total standard deviation of above three directions, characterize the crease intensity of fabric, wavelet coefficient standard deviation is larger, illustrates that fabric pincher degree is more serious.
With the device in the present embodiment and image processing method, to 20 kinds of common fabrics, (raw material comprises cotton, fiber crops, silk, wool, terylene and blending product thereof) carry out the test of the multi-direction wrinkle resistance of fabric, and with wavelet analysis, 6 is the best number of plies of decomposing, the total standard deviation of detail coefficients of three directions of fabric of now extracting with utilize fabric that YG541E type fully-automatic laser fabric crease elasticity test instrument records from 0 ° (being warp-wise fibre direction) every 10 °, to 170 ° (due to 180 ° of i.e. 0 ° of directions), the average creasy recovery angle related coefficient of totally 18 angle directions is the highest, reach 0.95.The regression equation of the two is Y=-0.0004X
2-0.0845X+139.12, wherein Y be fabric from 0 ° to 170 °, every the mean value of 10 ° of creasy recovery angles of surveying, X be with the method gained fabric wavelet decomposition number of plies in the present invention be 6 o'clock, the total standard deviation of detail coefficients of three directions of wrinkle image.Above regression equation can be used for predicting the multi-direction average creasy recovery angle of fabric, and without carrying out repeatedly duplicate measurements, time saving and energy saving, improved again work efficiency, provide cost savings.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and revision, be technology category of the present invention.
Claims (3)
1. the multi-direction crease recovery system safety testing device of fabric, comprise obtaining and treating apparatus of the multi-direction wrinkling device of fabric and fabric pincher image, it is characterized in that: the multi-direction wrinkling device material requested of fabric has bead and bungee, bungee is used for tying up the fabric that has wrapped up bead, by bead and bungee, jointly play fabric is applied to the effect from multiple different directions external force, make fabric produce divergent shape folding line; The acquisition device of fabric pincher image is digital camera or scanner, and the treating apparatus of fabric pincher image is computing machine.
2. utilize said apparatus to carry out the multi-direction crease recovery method of testing of fabric, it is characterized in that the method is specifically:
(1) by after smooth fabric flatiron to be measured, be cut into given size; And put on broadwise mark and warp-wise mark;
(2) fabric to be measured after cutting is placed on to the upper surface of hollow steel pipe, and bead is put in to the center of square fabric;
(3) the move up bungee at the outer wall place that is enclosed within hollow steel pipe, by the movement of bungee, make fabric evenly wrap bead, with bungee, the fabric that encases bead is tied up solid again, the number of turns of tying up of every fabric is unified, by bead and bungee, fabric is applied to the effect from multiple different directions external force, make fabric produce divergent shape folding line and make fabric produce the radial folding line of being dispersed by middle mind-set surrounding;
(4) tie up after the set time, bungee is cut off with scissors, and fabric is spread out by the light gesture of trying one's best;
(5) wrinkle fabric is put into scanner and scan, during scanning, do not have pressure to make fabric pincher produce distortion;
(6) to the wrinkle image input computing machine after scanning, and carry out following pre-service:
The first step, becomes unified size by the image cropping obtaining, and coloured image is converted into gray level image;
Second step, strengthens picture contrast; Adopt the method for gray scale linear transformation to strengthen dynamically the contrast of image, can make the tonal range of image dynamically strengthen, the contrast of image is effectively expanded, and makes image more clear;
(7) use wavelet analysis technology to carry out the decomposition of the different numbers of plies to pretreated fabric pincher image;
(8) extract level detail coefficient standard deviation, vertical detail coefficient standard deviation and the diagonal detail coefficient standard deviation of each decomposition level, by total standard deviation of above three directions, characterize the crease intensity of fabric, wavelet coefficient standard deviation is larger, illustrates that fabric pincher degree is more serious.
3. according to right, want the method for testing described in 2, it is characterized in that: strengthen picture contrast specifically:
1. draw the histogram of gray level image, by histogram, observe the intensity profile situation of image, determine the gray level interval that needs conversion;
2. utilize the contrast of the method stretching image of linear transformation, change the intensity profile scope of image, outstanding interested region, suppresses uninterested region, shows the image after linear transformation;
3. select the method for wavelet packet denoising to suppress the noise in image.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243671A (en) * | 2015-10-27 | 2016-01-13 | 浙江理工大学 | Testing and evaluating method for flatness of clothing in wear |
| CN105353108A (en) * | 2015-10-27 | 2016-02-24 | 浙江理工大学 | Test device and method for simulating bulging property of fabric in actual wearing |
| CN105628603A (en) * | 2016-03-10 | 2016-06-01 | 上海工程技术大学 | Fabric wrinkle analyzing equipment and fabric wrinkle analyzing method |
| CN106198937A (en) * | 2016-07-19 | 2016-12-07 | 江南大学 | A kind of dynamic evaluation method of crease recovery properties of woven fabrics |
| CN106610360A (en) * | 2015-10-27 | 2017-05-03 | 中国制浆造纸研究院 | Method for evaluating fold-crack resistance of coated paperboard |
| CN108318348A (en) * | 2017-12-31 | 2018-07-24 | 广德大金机械有限公司 | A kind of leather and fur products folding quality Intelligentized test system |
| CN111044517A (en) * | 2019-12-31 | 2020-04-21 | 宁波高新区意融科技有限公司 | Three-dimensional feature-based fabric fold grade evaluation method |
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| CN102768269A (en) * | 2012-07-26 | 2012-11-07 | 浙江理工大学 | Novel fabric wrinkling device and wrinkle resistance test method |
| CN203643346U (en) * | 2014-01-17 | 2014-06-11 | 浙江理工大学 | Multi-direction crease recovery testing device for fabrics |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243671A (en) * | 2015-10-27 | 2016-01-13 | 浙江理工大学 | Testing and evaluating method for flatness of clothing in wear |
| CN105353108A (en) * | 2015-10-27 | 2016-02-24 | 浙江理工大学 | Test device and method for simulating bulging property of fabric in actual wearing |
| CN105353108B (en) * | 2015-10-27 | 2017-02-01 | 浙江理工大学 | Test device and method for simulating bulging property of fabric in actual wearing |
| CN106610360A (en) * | 2015-10-27 | 2017-05-03 | 中国制浆造纸研究院 | Method for evaluating fold-crack resistance of coated paperboard |
| CN105243671B (en) * | 2015-10-27 | 2017-10-24 | 浙江理工大学 | A kind of clothes wear test and the evaluation method of flatness |
| CN105628603A (en) * | 2016-03-10 | 2016-06-01 | 上海工程技术大学 | Fabric wrinkle analyzing equipment and fabric wrinkle analyzing method |
| CN105628603B (en) * | 2016-03-10 | 2018-11-27 | 上海工程技术大学 | Fabric pincher analytical equipment |
| CN106198937A (en) * | 2016-07-19 | 2016-12-07 | 江南大学 | A kind of dynamic evaluation method of crease recovery properties of woven fabrics |
| CN108318348A (en) * | 2017-12-31 | 2018-07-24 | 广德大金机械有限公司 | A kind of leather and fur products folding quality Intelligentized test system |
| CN111044517A (en) * | 2019-12-31 | 2020-04-21 | 宁波高新区意融科技有限公司 | Three-dimensional feature-based fabric fold grade evaluation method |
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Effective date of registration: 20191025 Address after: Nong Cun Wang Jia Heshan Town Tongxiang city Jiaxing City, Zhejiang province 314500 Hu Jia Qiao Patentee after: Tongxiang City Jing Feng Textile Co., Ltd. Address before: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park No. 2 Street No. 928 Patentee before: Zhejiang University of Technology |
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Address after: No. 118, nanshengbang, dongbangtou village, Heshan Town, Tongxiang City, Jiaxing City, Zhejiang Province, 314512 Patentee after: Zhejiang Jingfeng Textile Technology Co.,Ltd. Address before: 314500 He Shan Zhen Wang Jia Nong Cun Hu Jia Qiao, Tongxiang City, Jiaxing City, Zhejiang Province Patentee before: TONGXIANG JINGFENG TEXTILE CO.,LTD. |
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