CN105628603A - Fabric wrinkle analyzing equipment and fabric wrinkle analyzing method - Google Patents
Fabric wrinkle analyzing equipment and fabric wrinkle analyzing method Download PDFInfo
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Abstract
The invention relates to the technical field of fabric testing, and discloses fabric wrinkle analyzing equipment and a fabric wrinkle analyzing method. The fabric wrinkle analyzing method comprises the following steps that a fabric is wound on a roller; the roller rotates around the axis of itself and drives the fabric to rotate; a wrinkling mechanism presses the fabric, and a wrinkling surface is formed; a photographing mechanism collects an image, on the side edge of the roller, of the wrinkling surface and sends an image signal to a processing mechanism; the processing mechanism generates a three-dimensional graph of the wrinkling surface according to the image signal; characteristic parameters of the fabric are extracted from the three-dimensional graph, and a testing result is obtained. According to the fabric wrinkle analyzing equipment adopting the fabric wrinkle analyzing method, not only can a three-dimensional image model of a fabric wrinkle be obtained, but also the advantage of being low in cost is achieved.
Description
Technical field
The present invention relates to fabric test technical field, in particular to a kind of fabric pincher Analytical equipment and fabric pincher analytical procedure.
Background technology
In daily life, the fabric forming dress material in use often can be subject to external force effect. These external force may produce the deformation such as irregular fine wrinkle, arch camber at fabric face. These deformation not only damage appearance of fabrics, and can significantly reduce the wearing quality of fabric. And in these deformation, some can be replied naturally, and more some cannot be replied.
Usually need to have good crease resistance and deformation-recovery ability due to first-class fabric, therefore the crease resistant finishing of fabric is one of important indicator of examination fabric quality.
Existing and current crease recovery properties of woven fabrics evaluation adopts outward appearance method more. So-called outward appearance method, it is exactly under normal atmosphere conditions, apply predetermined pressure to fabric to be tested with the pressure of standard wrinkle device, and keep for some time, then damping fabric to be tested under standard atmospheric conditions again, fabric to be tested is shone contrast with three-dimensional with reference to sample, evaluates appearance of fabrics to be measured.
Usually, every block fabric to be measured is graded separately through the viewer trained by the evaluation process of outward appearance method by three, and the personal experience of person selects the three-dimensional plastic sample card the most close with fabric to be measured according to the observation, finally calculate the mean value of each observation result of every block fabric.
This method is owing to relying on artificial evaluation, not only that evaluation and test environmental requirement is higher, and there is huge experimental error because of human factor.
In addition, in USS and China's GB, crease recovery also can be evaluated by the method measuring recovery of elasticity angle. But, this kind of method belongs to Indirect evaluation, not intuitively, it is difficult to the comprehensive condition of evaluation wrinkle.
Summary of the invention
It is an object of the invention to provide a kind of fabric pincher analytical procedure and fabric pincher Analytical equipment, have employed the 3-dimensional image model that the fabric pincher Analytical equipment of this fabric pincher analytical procedure not only can draw fabric pincher, and there is the advantage of low cost.
In order to solve the problems of the technologies described above, embodiments of the present invention provide a kind of fabric pincher Analytical equipment, comprise cylinder and folding mechanism, and fabric is around on cylinder, cylinder can rotate around own axes and drive fabric to rotate, and folding mechanism compressing fabric also forms corrugated surface. In addition, fabric pincher Analytical equipment also comprises shooting mechanism and the processing mechanism with the communication connection of shooting mechanism, and the coverage of shooting mechanism covers at least one edge of cylinder side. Shooting mechanism according to the image of the corrugated surface collected on cylinder side edge, to processing mechanism transmission figure image signal. Processing mechanism generates the three-dimensional picture of corrugated surface according to figure image signal.
Along with the development of computer technology and image analysis technology, utilize machine vision and digital image processing techniques at field of textiles, can directly obtain the appearance images information of yarn in kind. And image can be converted by computer image processing technology intuitively, characteristic information extraction, thus obtain test result. This kind of method does not rely on artificial evaluation, and interfering factors is less, and processing speed is fast, and cost is lower, has good repeatability, and therefore wrinkle performance for analyzing evaluation fabric has very big advantage. And in embodiments of the present invention, by being around on cylinder by fabric, and cylinder being rotated around own axes, shooting mechanism only needs the image on acquisition cylinder side face edge edge can rebuild the three-dimensional picture of corrugated surface when taking. Comparing traditional image scanning techniques, without the need to arranging, the scanning of multiple camera synchronization can obtain three-dimensional picture to embodiments of the present invention, because this reducing the quantity of camera, has significantly saved equipment cost. In addition, in embodiments of the present invention, by fabric is arranged on cylinder so that fabric can automatically complete wrinkleization and detection two step operation in same equipment, when avoiding difference complete operation, the process of transfer fabric is polluted the surface condition of fabric.
As preferably, shooting mechanism comprises camera and guide rod, and the side of guide rod extended line in the longitudinal direction and cylinder is along tangent. Camera is installed on guide rod and camera can move on the length direction of guide rod. Can carry out the camera of position adjustment at guide rod length direction can more easily according to the size of fabric and surface test situation adjusting focal length and coverage, and convenient, wide usage is stronger.
Further, as preferably, shooting mechanism also comprises propulsion source of finding a view, and propulsion source of finding a view can drive camera to move on guide rod, find a view propulsion source and processing mechanism communication connection. Utilize the motion of processing mechanism electric control camera, when operating without manpower intervention, therefore so that test carries out completely isolated when, can effectively prevent ectocine.
As preferably, fabric pincher Analytical equipment also comprises backlight, camera is just arranged by backlight, and cylinder is between camera and backlight. Utilize backlight can improve the contrast gradient of the image that corrugated surface obtains at camera, make image more clear.
As preferably, folding mechanism also comprises and the rolling propulsion source of processing mechanism communication connection, and rolling propulsion source is connected with drum drive, processing mechanism also drives drum for controlling rolling propulsion source. The automatic rolling of cylinder can also make equipment automatization more.
As preferably, folding mechanism comprises the pressing plate that two are placed on drum shaft two ends upwards respectively, wherein, have at least a pressing plate for can dynamic pressure plate, can dynamic pressure plate can along the axial motion of cylinder and jointly oppress fabric with another pressing plate. Utilization can be oppressed fabric and form effective wrinkle by dynamic pressure plate, and its principle is simple, with low cost.
Further, as preferably, two pressing plates be all can dynamic pressure plate, and two can be moved from the two ends of cylinder to the middle part of cylinder by dynamic pressure plate respectively, and meets at the middle part of cylinder. Owing to fabric has directivity, for fabric, can characterizing the surface of fabric for unidirectional compressing better from two-way compressing fabric, therefore the Detection results of gained has more reference value.
In addition, as preferably, folding mechanism also comprises compressing propulsion source and transmission assembly, transmission assembly connect respectively compressing propulsion source and can dynamic pressure plate, compressing propulsion source by transmission Component driver can dynamic pressure plate along the axial motion of cylinder. Utilize compressing propulsion source can realize can the communication control of dynamic pressure plate, it is to increase the automatization level of system.
Further, as preferably, compressing propulsion source can be motor, and transmission assembly comprises the leading screw being in transmission connection with motor, and the axis being parallel of leading screw and cylinder is arranged, and can be installed on leading screw by dynamic pressure plate. Driven by motor leading screw rotate, can dynamic pressure plate under the drive of leading screw along the axial motion of cylinder. Utilize the transmission combination of motor and leading screw can control flexibly can the motion of dynamic pressure plate, it is with low cost, it may be achieved property is good.
Obviously, as preferably, compressing propulsion source can also be gas bar, and transmission assembly comprises the union lever being in transmission connection with motor, can be connected with union lever by dynamic pressure plate. Gas bar drive union lever rotate, can dynamic pressure plate under the drive of union lever along the axial motion of cylinder. The gas bar of translational motion is utilized to drive union lever motion, it is not necessary to changing direction of motion, therefore in use procedure, mechanical energy loss is lower, and the stability of equipment is better.
Further, as preferably, the 2nd panel-like member that the first panel-like member with clothing in contact is connected and the pressure transmitter being located between the first panel-like member and the 2nd panel-like member can be comprised with transmission assembly by dynamic pressure plate, pressure transmitter and processing mechanism communication connection, the pressure of the 2nd panel-like member is sent pressure signal to processing mechanism according to the first panel-like member detected by pressure transmitter. Utilize pressure transmitter can obtain the pressure fed back to from the first panel-like member, such that it is able to fixing quantity can the pressure of dynamic pressure plate. Further, for the outside surface at movable pressure ring directly arranges pressure spot, due to panel-like member to the dispersion of pressure and evenly effect, the test structure that the pressure effect detected between each panel-like member obtains is more accurate.
Embodiments of the present invention additionally provide a kind of fabric pincher analytical procedure, and comprise the steps:
Fabric is around on cylinder;
Cylinder rotates around own axes and drives fabric to rotate;
Folding mechanism compressing fabric also forms corrugated surface;
Shooting mechanism gathers the image of corrugated surface on cylinder side edge, and sends figure image signal to processing mechanism;
Processing mechanism generates the three-dimensional picture of corrugated surface according to figure image signal;
From three-dimensional picture, extract the characteristic parameter of described fabric, and draw test result.
Owing to shooting mechanism only needs the image on acquisition cylinder side face edge edge can rebuild the three-dimensional picture of corrugated surface when taking, and according to this three-dimensional picture, processing mechanism can directly obtain required characteristic parameter, such as fold angle, crimp height, fold quantity, fold area etc., therefore has and better passes judgment on efficiency. Comparing traditional image scanning techniques, without the need to arranging, the scanning of multiple camera synchronization can obtain three-dimensional picture to embodiments of the present invention, because this reducing the quantity of camera, has significantly saved equipment cost.
As preferably, generate in the step of three-dimensional picture of corrugated surface according to figure image signal at processing mechanism, processing mechanism utilizes the height coordinate of any one corrugated surface drawing each two field picture that shooting mechanism gathers in following several method of calculation according to figure image signal, and generates three-dimensional model according to height coordinate;
The first method of calculation, comprises histogram analysis, image segmentation, height extraction step, particularly:
Histogram analysis: establish the image of fabric to be measured on cylinder side edge to meet f (x, y), f (x, y) �� [0,255], its histogram is h (i),, owing to there is the image of two objects in the image on cylinder side edge in i �� [0,255], also being exactly background and fabric to be measured projection, their intensity profile is close to Gaussian distribution. Obtain the intensity profile of these two subject image respectively, and by method of least squares, matching obtains average and the variance of two distributions: (u1,��1),(u2,��2);
Image segmentation: according to the intensity profile of background and fabric to be measured, setting threshold valueIn formula, �� is experience factor, t is carried out binary conversion treatment, obtains:
Highly extract: the region being 0 due to pixel value in image is fabric to be measured, scanning image and obtain pixel be 255 region and pixel be 0 the boundary contour in region, determining on boundary contour any coordinate every, wherein coordinate along vertical boundary direction is height coordinate.
Above-mentioned various in, value that ordinate zou that X-coordinate that x is pixel, y are pixel, f (x, y) they are pixel, h (i) and for pixel count, the t that pixel value is i be threshold value, �� is experience factor, u1For the intensity profile average of background, u2For the intensity profile average of fabric to be measured, ��1For the intensity profile variance of background; ��2For the intensity profile variance of fabric to be measured;
2nd kind of method of calculation, comprise rim detection and height extraction step, particularly:
Rim detection: utilize edge detection algorithm to calculate boundary contour, wherein, edge detection algorithm can be Marr edge detection method, Sobel operator, Robert operator or Laplace operator etc.;
Highly extracting: scanning image, according to the boundary contour detected, it is determined that any coordinate every on boundary contour, wherein coordinate along vertical boundary direction is height coordinate;
The third method of calculation, comprise promise pause conversion and height extraction step, particularly:
Nuo Dun converts: owing to the accumulation of gray scale is linear with the thickness of fabric to be measured, according to image projection summation in the vertical direction (i.e. promise in vertical direction pause conversion), obtains visual intensity profile in vertical direction;
Highly extract: owing to the accumulation of gray scale is linear with the thickness of fabric to be measured, by gray scale divided by default scale-up factor, obtain height coordinate.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of first embodiment of the invention fabric pincher Analytical equipment;
Fig. 2 is the module frame chart of first embodiment of the invention fabric pincher Analytical equipment;
Fig. 3 is the schematic diagram of second embodiment of the invention fabric pincher Analytical equipment;
Fig. 4 is that four embodiment of the invention fabric pincher Analytical equipment can the partial schematic diagram of dynamic pressure plate place part;
Description of reference numerals:
1, cylinder; 2, camera; 3, guide rod; 4, backlight; 5, pressing plate; 51, the first panel-like member; 52, the 2nd panel-like member; 53, spring; 6, leading screw; 7 union levers; 8, gas bar.
Embodiment
Enforcement mode one
The first enforcement mode of the present invention provides a kind of fabric pincher Analytical equipment, shown in combining see Fig. 1 and Fig. 2, comprising cylinder 1 and folding mechanism, fabric is around on cylinder 1, cylinder 1 can rotate around own axes and drive fabric to rotate, and folding mechanism compressing fabric also forms corrugated surface. In addition, fabric pincher Analytical equipment also comprises shooting mechanism and the processing mechanism with the communication connection of shooting mechanism, and the coverage of shooting mechanism covers at least one edge of cylinder 1 side. Shooting mechanism according to the image of the corrugated surface collected on cylinder 1 side edge, to processing mechanism transmission figure image signal. Processing mechanism generates the three-dimensional picture of corrugated surface according to figure image signal.
Wherein, shooting mechanism comprises camera 2 and guide rod 3, and the side of guide rod 3 extended line in the longitudinal direction and cylinder 1 is along tangent. Camera 2 is installed on guide rod 3 and camera 2 can move on the length direction of guide rod 3. Can carry out the camera 2 of position adjustment at guide rod 3 length direction can more easily according to the size of fabric and surface test situation adjusting focal length and coverage, and convenient, wide usage is stronger. Certainly, camera 2 can also be fixedly installed, and this does not affect the realization of the goal of the invention of the present invention. In addition, shooting mechanism also comprises propulsion source of finding a view, and propulsion source of finding a view can drive camera 2 to move on guide rod 3, find a view propulsion source and processing mechanism communication connection. Utilize the motion of processing mechanism electric control camera 2, when operating without manpower intervention, therefore so that test carries out completely isolated when, can effectively prevent ectocine. Certainly, employing manual operation does not affect the realization of the goal of the invention of the present invention yet.
In the present embodiment, fabric pincher Analytical equipment also comprises backlight 4, and camera 2 is just arranged by backlight 4, and cylinder 1 is between camera 2 and backlight 4. Utilize backlight 4 can improve the contrast gradient of the image that corrugated surface obtains at camera 2, make image more clear. Further, it is also possible to backlight 4 is communicatively connected to processing mechanism, it is achieved to the Automated condtrol of fabric pincher Analytical equipment. It should be noted that backlight 4 can select area source, and taking square or annular light source as good. Area source is softer relative to the luminescence of pointolite, just to being not easy formation halation during camera 2.
In the present embodiment, folding mechanism also comprises and the rolling propulsion source of processing mechanism communication connection, and motor and rolling propulsion source are in transmission connection, and processing mechanism also rotates for controlling driven by motor cylinder 1. The automatic rolling of cylinder 1 can also make equipment automatization more.
In the present embodiment, folding mechanism comprises the pressing plate 5 that two are placed on cylinder 1 two ends axially respectively, wherein, have a pressing plate 5 for can dynamic pressure plate 5, can dynamic pressure plate 5 can along the axial motion of cylinder 1 and jointly oppress fabric with another pressing plate 5. Utilization can be oppressed fabric and form effective wrinkle by dynamic pressure plate 5, and its principle is simple, with low cost. It should be noted that the shape of pressing plate 5 can be multiple, as long as the inner ring of pressing plate 5 is circular, it is possible to be enclosed within cylinder 1. In the present embodiment exemplarily, annular pressing plate 5 has been selected. Materials demand amount is minimum comparatively speaking for annular pressing plate 5, and weight is also the lightest.
In addition, in the present embodiment, folding mechanism also comprises compressing propulsion source and transmission assembly, transmission assembly connect respectively compressing propulsion source and can dynamic pressure plate 5, compressing propulsion source by transmission Component driver can dynamic pressure plate 5 along the axial motion of cylinder 1. Utilize compressing propulsion source can realize can the communication control of dynamic pressure plate 5, it is to increase the automatization level of system.
Specifically, in the present embodiment, compressing propulsion source can be motor, and transmission assembly comprises the leading screw 6 being in transmission connection with motor, and leading screw 6 is arranged with the axis being parallel of cylinder 1, can be installed on leading screw 6 by dynamic pressure plate 5. Driven by motor leading screw 6 rotates, can dynamic pressure plate 5 under the drive of leading screw 6 along the axial motion of cylinder 1. Utilize the transmission combination of motor and leading screw 6 can control flexibly can the motion of dynamic pressure plate 5, it is with low cost, it may be achieved property is good. Shown in Figure 1, symmetrically arranged two rhizoid thick sticks 6 so that the motion of pressing plate 5 is more stable, can strengthen the reliability of equipment.
In the process of reality, first by fabric around, on cylinder 1, being adjusted the position of camera 2 by guide rod 3, so that can be clear and intactly cover at least one edge of cylinder 1 side when camera 2 is taken. Then, order can dynamic pressure plate 5 under the effect of compressing propulsion source along the axial motion of cylinder 1, compressing fabric, resets after keeping for some time, so that it may to obtain the corrugated surface of fabric. While cylinder 1 drives fabric to rotate, fabric can be taken by camera 2 continuously. The photo process of fitting treatment that these are filmed by processing mechanism, obtains the 3-D view of fabric face.
Along with the development of computer technology and image analysis technology, utilize machine vision and digital image processing techniques at field of textiles, can directly obtain the appearance images information of yarn in kind. And image can be converted by computer image processing technology intuitively, characteristic information extraction, thus obtain test result. This kind of method does not rely on artificial evaluation, and interfering factors is less, and processing speed is fast, and cost is lower, has good repeatability, and therefore wrinkle performance for analyzing evaluation fabric has very big advantage. And in the present embodiment, by being around in by fabric on cylinder 1, and cylinder 1 being rotated around own axes, shooting mechanism only needs the image on acquisition cylinder 1 side face edge edge can rebuild the three-dimensional picture of corrugated surface when taking. Comparing traditional image scanning techniques, without the need to arranging, the scanning of multiple camera synchronization can obtain three-dimensional picture to present embodiment, because this reducing the quantity of camera, has significantly saved equipment cost. In addition, in embodiments of the present invention, by fabric being arranged on cylinder 1 so that fabric can automatically complete wrinkleization and detection two step operation in same equipment, when avoiding difference complete operation, the process of transfer fabric is polluted the surface condition of fabric.
Enforcement mode two
The 2nd enforcement mode of the present invention provides a kind of fabric pincher Analytical equipment, and the 2nd enforcement mode and the first enforcement mode are different, and main difference part is, in the first enforcement mode of the present invention, compressing propulsion source is motor; And in the 2nd enforcement mode of the present invention, shown in Figure 3, compressing propulsion source is gas bar 8, now, transmission assembly comprises the union lever 7 being in transmission connection with motor, can be connected with union lever 7 by dynamic pressure plate 5. Gas bar 8 drives union lever 7 to rotate, can dynamic pressure plate 5 under the drive of union lever 7 along the axial motion of cylinder 1. The gas bar 8 of translational motion is utilized to drive union lever 7 to move, it is not necessary to changing direction of motion, therefore in use procedure, mechanical energy loss is lower, and the stability of equipment is better.
In addition, during due to employing leading screw 6, the axis being parallel that leading screw 6 is usually set to and rolls. Now, leading screw 6 likely hinders being formed toward the upper operation being wound around fabric of rolling. And when adopting gas bar 8, it is possible to gas bar 8 and transmission rod are hidden in space reserved on the back of equipment or shell, thus provide better equipment to experience.
Enforcement mode three
The 3rd enforcement mode of the present invention provides a kind of fabric pincher Analytical equipment, 3rd enforcement mode is the first enforcement mode and the further improvement of the 2nd enforcement mode, main improvements are, in the first two enforcement mode of the present invention, only pressing plate 5 is can dynamic pressure plate 5, and in the 3rd enforcement mode of the present invention, two pressing plates 5 are all can dynamic pressure plate 5.
Particularly, these two can be moved to the middle part of cylinder 1 from the two ends of cylinder 1 respectively by dynamic pressure plate 5, and meet at the middle part of cylinder 1. Owing to the braiding of fabric self has directivity, for fabric, can characterizing the crease-resistant ability of fabric face for unidirectional compressing better from two-way compressing fabric, therefore the Detection results of gained has more reference value.
It should be noted that two can be realized by the leading screw 6 that two sense of rotation are contrary by dynamic pressure plate 5, it is also possible to realize by dynamic pressure plate 5 connecting independent gas bar 8 respectively at two. Concrete implementation has multiple, is therefore no longer repeated herein. Certainly, furthermore, it is also possible between dynamic pressure plate 5, crashproof mechanism can be set at two. Further improve and also repeat no more with prioritization scheme.
Enforcement mode four
The 4th enforcement mode of the present invention provides a kind of fabric pincher Analytical equipment, 4th enforcement mode is first, 2nd, the further improvement of the 3rd enforcement mode, main improvements are, in the 4th the enforcement mode of the present invention, shown in Figure 4, the first panel-like member 51 with clothing in contact can be comprised by dynamic pressure plate 5, the 2nd panel-like member 52 being connected with transmission assembly and the pressure transmitter being located between the first panel-like member 51 and the 2nd panel-like member 52, pressure transmitter and processing mechanism communication connection, the pressure of the 2nd panel-like member 52 is sent pressure signal to processing mechanism according to the first panel-like member 51 detected by pressure transmitter. utilize pressure transmitter can obtain the pressure fed back to from the first panel-like member 51, such that it is able to fixing quantity can the pressure of dynamic pressure plate 5. further, for the outside surface at movable pressure ring directly arranges pressure spot, due to panel-like member to the dispersion of pressure and evenly effect, the test structure that the pressure effect detected between each panel-like member obtains is more accurate.
, it is also possible to spring 53 is set between two panel-like members, further, in the present embodiment the contact of dynamic pressure plate 5 and fabric can turn to Elastic Contact by rigidity contact, thus adapt to the test request under some Special Circumstances.
Enforcement mode five
The 5th enforcement mode of the present invention provides a kind of fabric pincher analytical procedure, comprises the steps:
Fabric is around on cylinder 1;
Cylinder 1 rotates around own axes and drives fabric to rotate;
Folding mechanism compressing fabric also forms corrugated surface;
Shooting mechanism gathers the image of corrugated surface on cylinder 1 side edge, and sends figure image signal to processing mechanism;
Processing mechanism generates the three-dimensional picture of corrugated surface according to figure image signal;
From three-dimensional picture, extract the characteristic parameter of described fabric, and draw test result.
Owing to shooting mechanism only needs the image on acquisition cylinder 1 side face edge edge can rebuild the three-dimensional picture of corrugated surface when taking, and according to this three-dimensional picture, processing mechanism can directly obtain required characteristic parameter, such as fold angle, crimp height, fold quantity, fold area, crease recovery angle etc., therefore has and better passes judgment on efficiency. Comparing traditional image scanning techniques, without the need to arranging, the scanning of multiple camera synchronization can obtain three-dimensional picture to embodiments of the present invention, because this reducing the quantity of camera, has significantly saved equipment cost.
In the present embodiment, generate in the step of three-dimensional picture of corrugated surface according to figure image signal at processing mechanism, processing mechanism utilizes the height coordinate of any one corrugated surface drawing each two field picture that shooting mechanism gathers in following several method of calculation according to figure image signal, and generates three-dimensional model according to height coordinate;
The first method of calculation, comprises histogram analysis, image segmentation, height extraction step, particularly:
Histogram analysis: establish the image of fabric to be measured on cylinder 1 side edge to meet f (x, y), f (x, y) �� [0,255], its histogram is h (i),, owing to there is the image of two objects in the image on cylinder 1 side edge in i �� [0,255], also being exactly background and fabric to be measured projection, their intensity profile is close to Gaussian distribution. Obtain the intensity profile of these two subject image respectively, and by method of least squares, matching obtains average and the variance of two distributions: (u1,��1),(u2,��2);
Image segmentation: according to the intensity profile of background and fabric to be measured, setting threshold valueIn formula, �� is experience factor, t is carried out binary conversion treatment, obtains:
Highly extract: the region being 0 due to pixel value in image is fabric to be measured, scanning image and obtain pixel be 255 region and pixel be 0 the boundary contour in region, determining on boundary contour any coordinate every, wherein coordinate along vertical boundary direction is height coordinate.
Above-mentioned various in, value that ordinate zou that X-coordinate that x is pixel, y are pixel, f (x, y) they are pixel, h (i) and for pixel count, the t that pixel value is i be threshold value, �� is experience factor, u1For the intensity profile average of background, u2For the intensity profile average of fabric to be measured, ��1For the intensity profile variance of background; ��2For the intensity profile variance of fabric to be measured;
2nd kind of method of calculation, comprise rim detection and height extraction step, particularly:
Rim detection: utilize edge detection algorithm to calculate boundary contour, wherein, edge detection algorithm can be Marr edge detection method, Sobel operator, Robert operator or Laplace operator etc.;
Highly extracting: scanning image, according to the boundary contour detected, it is determined that any coordinate every on boundary contour, wherein coordinate along vertical boundary direction is height coordinate;
The third method of calculation, comprise promise pause conversion and height extraction step, particularly:
Nuo Dun converts: owing to the accumulation of gray scale is linear with the thickness of fabric to be measured, according to image projection summation in the vertical direction (i.e. promise in vertical direction pause conversion), obtains visual intensity profile in vertical direction;
Highly extract: owing to the accumulation of gray scale is linear with the thickness of fabric to be measured, by gray scale divided by default scale-up factor, obtain height coordinate.
Claims (10)
1. a fabric pincher Analytical equipment, it is characterized in that: comprise cylinder and folding mechanism, described fabric is around on described cylinder, and described cylinder can rotate around own axes and drive described fabric to rotate, and described folding mechanism is oppressed described fabric and formed corrugated surface;
Described fabric pincher Analytical equipment also comprises shooting mechanism and the processing mechanism with the communication connection of described shooting mechanism, and the coverage of described shooting mechanism covers at least one edge of described cylinder side;
Described shooting mechanism according to the image of the described corrugated surface collected on described cylinder side edge, to described processing mechanism transmission figure image signal; Described processing mechanism generates the three-dimensional picture of described corrugated surface according to described figure image signal.
2. fabric pincher Analytical equipment according to claim 1, it is characterised in that: described shooting mechanism comprises camera and guide rod, and the side of described guide rod extended line in the longitudinal direction and described cylinder is along tangent;
Described camera is installed on described guide rod and described camera can move on the length direction of described guide rod;
Described fabric pincher Analytical equipment also comprises backlight, and described camera is just arranged by described backlight, and described cylinder is between described camera and described backlight.
3. fabric pincher Analytical equipment according to claim 1, it is characterized in that: described folding mechanism comprises the pressing plate that two are placed on described drum shaft two ends upwards respectively, wherein, have at least a pressing plate for can dynamic pressure plate, described can dynamic pressure plate can along the axial motion of described cylinder and jointly oppress described fabric with another pressing plate.
4. fabric pincher Analytical equipment according to claim 3, it is characterised in that: two pressing plates be all can dynamic pressure plate, and two can be moved from the two ends of described cylinder to the middle part of described cylinder by dynamic pressure plate respectively, and meets at the middle part of described cylinder.
5. fabric pincher Analytical equipment according to claim 3, it is characterized in that: described folding mechanism also comprises compressing propulsion source and transmission assembly, described transmission assembly connect respectively described compressing propulsion source and described can dynamic pressure plate, described compressing propulsion source by described in described transmission Component driver can dynamic pressure plate along the axial motion of described cylinder.
6. fabric pincher Analytical equipment according to claim 5, it is characterized in that: described compressing propulsion source is motor, described transmission assembly comprises and the leading screw that described motor is in transmission connection, and the axis being parallel of described leading screw and described cylinder is arranged, and described can be installed on described leading screw by dynamic pressure plate;
Described in described driven by motor leading screw rotate, described can dynamic pressure plate under the drive of described leading screw along the axial motion of described cylinder.
7. fabric pincher Analytical equipment according to claim 6, it is characterised in that: described compressing propulsion source is gas bar, and described transmission assembly comprises and the union lever that described motor is in transmission connection, and described can be connected with union lever by dynamic pressure plate;
Described gas bar drives described union lever to move, described can dynamic pressure plate under the drive of described union lever along the axial motion of described cylinder.
8. according to fabric pincher Analytical equipment described in any one in claim 5 to 7, it is characterized in that: described can comprise the 2nd panel-like member that the first panel-like member with described clothing in contact is connected and the pressure transmitter being located between described first panel-like member and the 2nd panel-like member with described transmission assembly by dynamic pressure plate, described pressure transmitter and the communication connection of described processing mechanism, the pressure of described 2nd panel-like member is sent pressure signal to described processing mechanism according to the first panel-like member detected by described pressure transmitter.
9. a fabric pincher analytical procedure, it is characterised in that, comprise the steps:
Fabric is around on cylinder;
Described cylinder rotates around own axes and drives described fabric to rotate;
Folding mechanism is oppressed described fabric and is formed corrugated surface;
Shooting mechanism gathers the image of described corrugated surface on described cylinder side edge, and sends figure image signal to processing mechanism;
Described processing mechanism generates the three-dimensional picture of described corrugated surface according to described figure image signal;
From described three-dimensional picture, extract the characteristic parameter of described fabric, and draw test result.
10. fabric pincher analytical procedure according to claim 9, it is characterized in that, generate in the step of three-dimensional picture of described corrugated surface at described processing mechanism according to described figure image signal, described processing mechanism utilizes the height coordinate of any one corrugated surface drawing each two field picture that described shooting mechanism gathers in following three kinds of method of calculation according to described figure image signal, and generates described three-dimensional model according to described height coordinate;
The first method of calculation, comprises histogram analysis, image segmentation, height extraction step, wherein:
Histogram analysis:
If the image of fabric to be measured on described cylinder side edge meets f (x, y), f (x, y) �� [0,255], its histogram is h (i), i �� [0,255], obtains the intensity profile of described image respectively, and by method of least squares, matching obtains average and the variance of two distributions: (u1,��1),(u2,��2);
Image segmentation: setting threshold value t meets:T is carried out binary conversion treatment, obtains:
Highly extract: the region being 0 due to pixel value in described image is fabric to be measured, scan described image and obtain pixel be 255 region and pixel be 0 the boundary contour in region, determining on described boundary contour any coordinate every, wherein coordinate along vertical boundary direction is height coordinate;
Described various in, value that ordinate zou that X-coordinate that x is pixel, y are pixel, f (x, y) they are pixel, h (i) and for pixel count, the t that pixel value is i be threshold value, �� is experience factor, u1For the intensity profile average of background, u2For the intensity profile average of fabric to be measured, ��1For the intensity profile variance of background; ��2For the intensity profile variance of fabric to be measured;
2nd kind of method of calculation, comprise rim detection and height extraction step, wherein:
Rim detection: utilize Marr edge detection method, Sobel operator, Robert operator or Laplace operator detect the boundary contour of picture of publishing picture;
Highly extracting: scanning image, according to the described boundary contour detected, it is determined that any coordinate every on boundary contour, wherein coordinate along vertical boundary direction is height coordinate;
The third method of calculation, comprise promise pause conversion and height extraction step, wherein:
Nuo Dun convert: according to described image in the vertical direction projection summation, obtain described image intensity profile in vertical direction;
Highly extract: by described gray scale divided by default scale-up factor, obtain height coordinate.
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