CN114663435B - Automatic monitoring method for tension abnormity of textile fabric - Google Patents
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 130
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Abstract
The invention relates to the technical field of spinning, in particular to a method for automatically monitoring tension abnormity of textile fabric, which comprises the following steps: acquiring a cloth image, and performing multi-scale down-sampling on the cloth image; acquiring a gray level co-occurrence matrix and a gray level run-length matrix of each sampled image, and acquiring a comprehensive monitoring index of the sampled image according to the gray level co-occurrence matrix and the gray level run-length matrix; and automatically monitoring the abnormal tension of the textile fabric according to the comprehensive monitoring index of each sampling image. The monitoring result of the invention is not interfered by other cloth defects, the false detection rate is low, and the accuracy of the cloth tension abnormity detection is ensured. The method can be applied in general control or regulation systems or in monitoring or testing devices of such systems or units, in particular in production field artificial intelligence systems, in industrial automation system device manufacturing and in intelligent monitoring devices. In addition, the method can be used for developing application software such as computer vision software.
Description
Technical Field
The invention relates to the field of textiles, in particular to an automatic monitoring method for tension abnormity of textile fabrics.
Background
In the textile industry, the tension of cloth directly affects the quality of finished cloth products, if the tension of the cloth is abnormal, the tension of the cloth not only can cause the surface quality defect of the cloth, but also can cause the failure of a cloth rolling machine in the subsequent finishing procedure of the cloth, the damage of the winding of the cloth and the uneven winding diameter of the finished cloth can be easily caused, and the production efficiency of enterprises and the quality of products can be seriously affected. Therefore, in the production process of the cloth, the tension of the cloth needs to be monitored to prevent the above situation.
The existing method for monitoring the cloth tension mostly utilizes a cloth tension detector, although the method can accurately detect the tension of the cloth, the method essentially belongs to the direct measurement of the tension, and the method is sampling measurement and cannot comprehensively detect all cloth finished products on the whole production line; although the method ensures the accuracy of detection, the method ignores the comprehensiveness of the detection. When tension of the cloth is abnormal, the tension is often abnormal along with the position abnormality of warps and wefts of the cloth, namely the phenomenon of uneven density of warps and wefts on the surface of the cloth occurs, whether the tension of the cloth is abnormal can be indirectly determined by utilizing the position abnormality of the warps and wefts on the surface of the cloth, however, other defects of the cloth can also cause the position abnormality of the warps and wefts, and the existing image processing technology such as a gray level co-occurrence matrix method can only monitor the position abnormality of the warps and wefts, so that the tension abnormality monitoring result is interfered by other cloth defects, and false detection is generated.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an automatic monitoring method for tension abnormity of textile fabric, which adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a method for automatically monitoring tension abnormality of a textile fabric, including the following specific steps:
acquiring a cloth image, and performing multi-scale down-sampling on the cloth image;
acquiring a gray level co-occurrence matrix and a gray level run-length matrix of each sampled image, acquiring a first monitoring index according to an entropy characteristic value of the gray level co-occurrence matrix, calculating a second monitoring index based on the gray level run-length matrix, representing the distribution complexity of pixels continuously appearing in each gray level, and acquiring a comprehensive monitoring index of the sampled image by combining the first monitoring index and the second monitoring index;
and automatically monitoring the abnormal tension of the textile fabric according to the comprehensive monitoring index of each sampling image.
Further, the obtaining of the first monitoring index specifically includes:
setting a space parameter and a direction angle parameter of a pixel point pair for each sampling image, and acquiring a plurality of gray level co-occurrence matrixes; dividing the gray level of the pixel to obtain a plurality of gray level binary groups of the pixel point pair, and calculating an entropy characteristic value according to the occurrence probability of the pixel point pair corresponding to each gray level binary group based on the pixel gray level; and the mean value of the entropy characteristic values corresponding to the angle parameters in each direction is a first monitoring index.
Further, the obtaining of the second monitoring index specifically includes:
setting a walking direction for each sampled image, and acquiring a plurality of gray level run matrixes; for each gray level run matrix, the gray level and the walk length form a run binary group, the ratio of the number of pixels corresponding to each run binary group is probability, and the calculation result is a second sub-monitoring index according to the entropy calculation mode; and the mean value of the second sub-monitoring index is the second monitoring index.
Further, the obtaining of the number of pixels corresponding to each run binary group specifically includes:
the product of the walk length in the run binary and the value of the run binary corresponding to the gray scale run matrix is the number of pixels corresponding to the run binary.
And further, automatically monitoring the tension abnormity of the textile fabric according to the sum of the comprehensive monitoring indexes of each sampling image.
Furthermore, setting weight for comprehensive monitoring indexes of the sampled image, wherein the smaller the size of the sampled image is, the smaller the weight is; and automatically monitoring the abnormal tension of the textile fabric according to the weighted sum of the comprehensive monitoring indexes of the sampling images.
The embodiment of the invention at least has the following beneficial effects: the method comprises the steps of obtaining a first monitoring index based on a gray level co-occurrence matrix, obtaining a second monitoring index based on a gray level run matrix, obtaining a comprehensive detection index of a sampling image by combining the first monitoring index and the second monitoring index, and automatically monitoring the tension abnormity of the textile fabric based on the comprehensive detection index; the method has the advantages that the monitoring result is not interfered by other cloth defects, the false detection rate is low, the accuracy of the tension abnormity detection of the cloth is ensured, and the comprehensiveness of the detection is improved. Based on the above advantages, the method can be applied in general control or regulation systems or in monitoring or testing devices of such systems or units, in particular in production field artificial intelligence systems, in industrial automation system device manufacturing and in intelligent monitoring devices. In addition, the method can be used for developing application software such as computer vision software.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flowchart illustrating steps according to an embodiment of the present invention.
Detailed Description
In order to further illustrate the technical means and effects of the present invention adopted to achieve the predetermined invention purpose, the following detailed description will be given to the specific implementation manner, structure, features and effects of the automatic monitoring method for tension abnormality of textile fabric according to the present invention with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The following application scenarios are taken as examples to illustrate the present invention:
in textile material tension monitoring, the existing automatic monitoring generally utilizes a cloth tension detection machine to carry out selective examination, and the cloth tension detection machine is difficult to set on a production line, so that the whole batch of cloth can not be comprehensively monitored. The existing image processing technology is easy to misjudge some defect types on the surface of the cloth as tension abnormity when judging the tension abnormity according to the position abnormity of the warp and weft yarns on the surface of the cloth. Therefore, a method for automatically monitoring tension abnormality of cloth is needed to improve the efficiency and comprehensiveness of tension abnormality monitoring and ensure the monitoring accuracy.
Based on the reasons, the invention provides an automatic monitoring method for tension abnormity of textile fabrics.
The following describes a specific scheme of the automatic monitoring method for tension abnormality of textile fabric provided by the invention in detail with reference to the accompanying drawings.
Referring to fig. 1, a flow chart of steps of an automatic monitoring method for tension abnormality of a textile fabric according to an embodiment of the present invention is shown, the method includes the following steps:
acquiring a cloth image, and performing multi-scale down-sampling on the cloth image;
acquiring a gray level co-occurrence matrix and a gray level run-length matrix of each sampled image, acquiring a first monitoring index according to an entropy characteristic value of the gray level co-occurrence matrix, calculating a second monitoring index based on the gray level run-length matrix, representing the distribution complexity of pixels continuously appearing in each gray level, and acquiring a comprehensive monitoring index of the sampled image by combining the first monitoring index and the second monitoring index;
and automatically monitoring the abnormal tension of the textile fabric according to the comprehensive monitoring index of each sampling image.
The above steps are described in detail below:
(1) and acquiring a cloth image, and performing multi-scale down-sampling on the cloth image.
Carrying out image acquisition on the surface of the cloth, setting the obtained image to be equal in length and width in the embodiment, carrying out graying to obtain a cloth image, carrying out multi-scale pyramid sampling on the cloth image, and carrying out the stepsSub-sampling by a sub-pyramid, and recording the sampled image obtained after each time of down-sampling as,The value range of (a) is [0,],when the value is 0, it means that downsampling is not performed, that is, the sampled image is the original image.
(2) The method comprises the steps of obtaining a gray level co-occurrence matrix and a gray level run-length matrix of each sampled image, obtaining a first monitoring index according to an entropy characteristic value of the gray level co-occurrence matrix, calculating a second monitoring index based on the gray level run-length matrix, representing the distribution complexity of pixels continuously appearing in each gray level, and obtaining a comprehensive monitoring index of the sampled image by combining the first monitoring index and the second monitoring index.
The first monitoring index is specifically obtained as follows: setting a space parameter and a direction angle parameter of a pixel point pair for each sampling image, and acquiring a plurality of gray level co-occurrence matrixes; dividing the gray level of the pixel to obtain a plurality of gray level binary groups of the pixel point pair, and calculating an entropy characteristic value according to the occurrence probability of the pixel point pair corresponding to each gray level binary group based on the pixel gray level; and the mean value of the entropy characteristic values corresponding to the angle parameters in each direction is a first monitoring index.
The second monitoring index is specifically obtained as follows: setting a walking direction for each sampled image, and acquiring a plurality of gray level run matrixes; for each gray level run matrix, the gray level and the walk length form a run binary group, the ratio of the number of pixels corresponding to each run binary group is probability, and the calculation result is a second sub-monitoring index according to the entropy calculation mode; and the mean value of the second sub-monitoring index is the second monitoring index.
Following to sample the imageFor example, the process of acquiring the first monitoring index, the second monitoring index and the comprehensive monitoring index of the sampled image is described.
multiple gray level co-occurrence matrixes of the sampled images can be obtained due to different statistical modes, and direction angle parameters are set in the embodimentIs composed ofAndi.e., vertical and horizontal; distance parameter for pixel point pairs,The value range of (a) is [1,],the maximum distance between pixel point pairs, in the embodimentIs 10. Pitch parameter based on pixel point pairsAnd direction angle parameterObtaining gray level co-occurrence matrix of sampled image, i.e. direction angle parameterOrDistance parameter of pixel point pairIs a copolymer of (1),]any one value of the gray level co-occurrence matrixes of the sampled images is obtained, and then the gray level co-occurrence matrixes can be obtained togetherA gray level co-occurrence matrix. Acquiring a first monitoring index of a sampling image based on a gray level co-occurrence matrix: dividing the gray scale of the pixel to obtain a plurality of gray of the pixel point pairDegree level binary groups, based on pixel gray levels, calculating entropy characteristic values according to the occurrence probability of pixel point pairs corresponding to each gray level binary group; the mean value of the entropy characteristic values corresponding to the angle parameters in each direction is a first monitoring index; in particular, the pixel gray scale regions 0-255 in the sampled image are divided intoAnd (2) obtaining corresponding gray levels according to the gray level of each pixel, wherein the gray levels of the pixels in the pixel point pair form gray level binary groups, and the entropy characteristic value is calculated according to the occurrence probability of the pixel point pair corresponding to each gray level binary group, and as an example, the entropy characteristic value is calculated in the following manner:
the distance parameter for a pixel point pair isThe direction angle parameter isThe entropy eigenvalue of the time-acquired gray level eigenvalue matrix is in the value range of [0, 1%];Representing binary groups of grey levelsThe probability of occurrence of the corresponding pixel point pair, i.e. the gray level binary group in the gray level co-occurrence matrix isThe probability of occurrence of a pixel point pair of (a);the gray levels of two pixels in the pixel point pair are respectively the firstA gray scale andthe number of the gray-scale levels is,andthe value ranges of (A) are all [1,]preferably in the examplesThe value was taken to be 5.
The mean value of the entropy characteristic values and the entropy characteristic values corresponding to the angle parameters in all directions is a first monitoring index, and specifically:
is used as a first monitoring index and is used as a second monitoring index,the larger the value is, the more possible tension abnormality of the textile fabric in the sampling image exists, based on the arrangement mode of the warps and the wefts on the textile fabric, if the tension of the textile fabric is abnormal, the warps and the wefts can be subjected to position deviation, namely twisting, so that the interval of the pixels with the same gray level can be uneven, and if the tension abnormality of the textile fabric is not generated, the pixels with the same gray level are at 0 degree or 9 degreesNo matter what pixel point is used for counting the distance parameter in the 0-degree direction, the corresponding first monitoring index tends to be 0 value. Thus, for the differencesDifferent entropy characteristic values exist, namely the entropy characteristic values of the cloth materials are different under different point-to-point distance statistical modes, and the entropy characteristic values are differentCorresponding entropy eigenvalues are based on the pixel point-to-point spacing parameterThe first monitoring index is obtained by weight distribution of the size of the first monitoring index;andrespectively, direction angle parameterAndthe corresponding sum of entropy eigenvalues.
setting the direction of wanderingAcquiring a plurality of gray level run matrixes; direction of embodimentIncluding 0 deg. and 90 deg., directions of wanderingRespectively at 0 degree and 90 degrees, and acquiring two gray level run-length matrixes; sampling imagesLength of side is noted asThen sampling the imageHas a maximum run length of。
For each gray level run matrix, the gray level and the migration length form a run binary group, the pixel number ratio corresponding to each run binary group is probability, and the calculation result is a second sub-monitoring index according to the calculation mode of entropy; and the mean value of the second sub-monitoring index is the second monitoring index. The obtaining of the number of pixels corresponding to each run binary group specifically includes: the product of the walk length in the run binary and the value of the run binary corresponding to the gray scale run matrix is the number of pixels corresponding to the run binary.
As an example, the second monitoring index is calculated by:
based on sampled imagesCorresponding to a direction of travel ofCalculating a second sub-monitoring index obtained by the gray level run matrix;in order to run the binary group,the display of the gray scale levels is performed,the value range of (a) is [1,],the length of the walk is indicated and,the value range of (a) is [1,],representing a gray level of a gray run matrix ofRun length ofThe value of (a) is (b),representing run doubletsThe number of pixels to be used in the corresponding,representing a sampled imageThe total number of pixels in the image data,representing run doubletsThe corresponding pixel number is in proportion;for sampling imagesThe corresponding second monitoring index is normalized data, if the textile fabric has no tension abnormity, the number of continuous pixels of each gray level is fixed, the number of pixels corresponding to each run binary group is proportional, namely the distribution of probability is regular, therefore,is smaller, and thenThe value of (A) is also smaller, otherwise, the number of continuous pixels of each gray scale is not fixed, the ratio of the number of pixels corresponding to each run binary group, namely the distribution of probability, is irregular and dispersed, namely, the distribution of the continuously appearing pixels of each gray scale is complex and complex, and further, the distribution of the continuously appearing pixels of each gray scale is complex and complexThe value of (a) is large,the value of (A) is also large, and therefore, the larger the second monitoring index value is, the more the sampled image isThe more likely there is tension anomaly in the woven cloth of (1).
the comprehensive monitoring index of the sampling image is obtained by combining the first monitoring index and the second monitoring index, the comprehensive monitoring index is in positive correlation with the first monitoring index and the second monitoring index, preferably, as an example, the calculation mode of the comprehensive monitoring index is as follows:
for sampling imagesThe comprehensive monitoring index of (1) is normalized data;andrespectively a sampled imageThe first monitoring index and the second monitoring index.
According to the method, the comprehensive monitoring index of each sampling image can be obtained.
(3) And automatically monitoring the abnormal tension of the textile fabric according to the comprehensive monitoring index of each sampling image.
In one embodiment, the tension abnormity of the textile fabric is automatically monitored according to the sum of the comprehensive monitoring indexes of each sampling image; set up threshold ∅, when the sum of comprehensive monitoring index was greater than the threshold value, textile fabric had the tension anomaly, reported to the police and suggested.
In another embodiment, a weight is set for the comprehensive monitoring index of the sampled image, and the smaller the size of the sampled image is, the smaller the weight is; and automatically monitoring the abnormal tension of the textile fabric according to the weighted sum of the comprehensive monitoring indexes of the sampling images. As one example, an image is sampledThe weight of the comprehensive monitoring index isThen, the weighted sum is specifically:
for a weighted sum, a threshold ∅ is set, and tension anomaly monitoring is performed as follows: when Z is equal to 0, ∅]In time, the tension of the textile fabric is not abnormal, and no alarm prompt is given; when Z is equal to [ ∅, 1 ]]And in time, the textile fabric has abnormal tension, and an alarm is given.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A textile fabric tension abnormity automatic monitoring method is characterized by comprising the following steps:
acquiring a cloth image, and performing multi-scale down-sampling on the cloth image;
acquiring a gray level co-occurrence matrix and a gray level run-length matrix of each sampled image, acquiring a first monitoring index according to an entropy characteristic value of the gray level co-occurrence matrix, calculating a second monitoring index based on the gray level run-length matrix, representing the distribution complexity of pixels continuously appearing in each gray level, and acquiring a comprehensive monitoring index of the sampled image by combining the first monitoring index and the second monitoring index;
automatically monitoring the abnormal tension of the textile fabric according to the comprehensive monitoring index of each sampling image;
the first monitoring index is obtained specifically as follows:
for each sampled image, setting a distance parameter and a direction angle parameter of a pixel point pair to obtain a plurality of gray level co-occurrence matrixes; dividing the gray level of the pixel to obtain a plurality of gray level binary groups of the pixel point pair, and calculating an entropy characteristic value according to the occurrence probability of the pixel point pair corresponding to each gray level binary group based on the pixel gray level; the mean value of the entropy characteristic values corresponding to the angle parameters in each direction is a first monitoring index;
the second monitoring index is specifically obtained as follows:
setting a walking direction for each sampled image, and acquiring a plurality of gray level run matrixes; for each gray level run matrix, the gray level and the walk length form a run binary group, the ratio of the number of pixels corresponding to each run binary group is probability, and the calculation result is a second sub-monitoring index according to the entropy calculation mode; the mean value of the second sub-monitoring index is a second monitoring index;
the obtaining of the number of pixels corresponding to each run binary group specifically includes:
the product of the walk length in the run binary group and the value of the run binary group corresponding to the gray level run matrix is the number of pixels corresponding to the run binary group;
the acquisition of the comprehensive monitoring index specifically comprises the following steps:
the calculation mode of the comprehensive monitoring index is as follows:
2. The method of claim 1, wherein the tension abnormality of the textile fabric is automatically monitored according to the sum of the comprehensive monitoring indexes of the sampled images.
3. The automatic monitoring method for tension abnormality of textile fabric material according to claim 1, characterized in that weight is set for comprehensive monitoring index of sampling image, and the smaller the size of sampling image is, the smaller the weight is; and automatically monitoring the abnormal tension of the textile fabric according to the weighted sum of the comprehensive monitoring indexes of the sampling images.
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CN114913248B (en) * | 2022-07-18 | 2023-08-22 | 佛山品特塑彩新材料有限公司 | Self-adaptive control method of corona machine in film production process |
CN114913178B (en) * | 2022-07-19 | 2022-09-23 | 山东天宸塑业有限公司 | Melt-blown fabric defect detection method and system |
CN114972894A (en) * | 2022-07-26 | 2022-08-30 | 南通三信塑胶装备科技股份有限公司 | CPP film defect classification method based on computer vision |
CN114998345A (en) * | 2022-08-04 | 2022-09-02 | 南通金丝楠膜材料有限公司 | Injection molding silver thread defect detection method and system based on gray level run matrix |
CN115082458B (en) * | 2022-08-18 | 2022-11-15 | 南通睿谷纺织科技有限公司 | Textile material defect analysis method based on gray level run matrix |
CN115100213B (en) * | 2022-08-29 | 2022-12-09 | 海门喜满庭纺织品有限公司 | Material bleaching identification method in textile technology and data processing system |
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