CN109658410B - Cutting bed, alignment device and alignment method for cloth strip lattices - Google Patents
Cutting bed, alignment device and alignment method for cloth strip lattices Download PDFInfo
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- CN109658410B CN109658410B CN201910027159.5A CN201910027159A CN109658410B CN 109658410 B CN109658410 B CN 109658410B CN 201910027159 A CN201910027159 A CN 201910027159A CN 109658410 B CN109658410 B CN 109658410B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/30—Determination of transform parameters for the alignment of images, i.e. image registration
- G06T7/33—Determination of transform parameters for the alignment of images, i.e. image registration using feature-based methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/60—Analysis of geometric attributes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/70—Determining position or orientation of objects or cameras
- G06T7/73—Determining position or orientation of objects or cameras using feature-based methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30124—Fabrics; Textile; Paper
Abstract
The invention discloses an alignment method of cloth strips, which comprises the following steps: acquiring the actual shape and size of a preset pattern, theoretical position information of the preset pattern relative to a strip lattice on theoretical cloth and an image of the actual cloth; mapping the preset pattern to the image of the actual cloth according to the theoretical position information to obtain actual position information; and correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth. The invention discloses an aligning device of cloth strip lattices and a cutting bed comprising the aligning device. The alignment method can meet the requirement of strip lattice alignment and can also carry out size repair according to the actual condition of the cloth.
Description
Technical Field
The invention relates to the technical field of cutting beds, in particular to a cutting bed, a device and a method for aligning cloth strip lattices.
Background
At present, in the tailoring field, the strip lattices are often required to be considered for aligning aiming at the tailoring of the strip lattice shirt, and the strip lattice aligning process is relatively complicated based on the different sizes of the strip lattices and the variety of the preference of people, so that the strip lattice shirt is generally tailored by manpower on the market.
In the actual production process, the precision is usually ensured by carrying out single-piece fine cutting after batch rough cutting, the process consumes great manpower, and the cloth cannot be fully utilized by the cutting mode, so that the waste of the cloth is caused.
Meanwhile, in the production process of the fabric, the situation of insufficient precision inevitably exists, so that the fabric has the problems of skewness in weft and size, the strip pattern period is not strictly circulated according to the theoretical period, and the actually cut pieces cannot meet the requirements of strip alignment and strict unchanged size at the same time based on the factors.
Disclosure of Invention
The invention aims to provide a cutting bed, a cloth strip grid aligning device and a cloth strip grid aligning method, which can meet the requirement of strip grid aligning and can also carry out size repair according to the actual condition of cloth; on the premise of completely meeting the shirt production process, the production efficiency of a factory is greatly improved, and the increasingly scarce labor force is liberated.
In order to achieve the above object, the present invention provides an aligning method of fabric panels, comprising:
acquiring the actual shape and size of a preset pattern, theoretical position information of the preset pattern relative to a strip lattice on theoretical cloth and an image of the actual cloth;
mapping the preset pattern to the image of the actual cloth according to the theoretical position information to obtain actual position information;
and correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
Preferably, the step of mapping the preset pattern to the image of the actual cloth according to the theoretical position information to obtain the actual position information specifically includes:
obtaining characteristic points of the actual cloth according to the image of the actual cloth, wherein all the characteristic points correspond to different reference points of the theoretical cloth one by one respectively;
and mapping the preset pattern to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points to obtain the actual position information.
Preferably, the step of mapping the preset pattern to the image of the actual cloth according to the theoretical position information to obtain the actual position information specifically includes:
obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, wherein the characteristic surface corresponds to a reference surface of the theoretical cloth;
and mapping the preset pattern to the image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
Preferably, the step of correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth includes:
acquiring a theoretical distance between a theoretical preset point on the edge of the pattern presented by the theoretical position information and a reference object, wherein the reference object is located at an absolute position relative to the image of the theoretical cloth and the image of the actual cloth;
determining an actual preset point on the edge of the pattern presented by the actual position information according to the position relation of the theoretical preset point relative to the preset pattern;
acquiring an actual distance between the actual preset point and a reference object;
and adjusting the position of the actual preset point according to the difference between the theoretical distance and the actual distance to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
Preferably, the reference object is specifically two reference axes perpendicular to each other or a geometric center point of a pattern presented by the theoretical position information.
The invention also provides an aligning device for cloth strips, comprising:
an acquisition system: the device comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring the actual shape and size of a preset pattern, theoretical position information of the preset pattern relative to a strip lattice on theoretical cloth and an image of the actual cloth;
the mapping system comprises: the preset pattern is mapped to the image of the actual cloth according to the theoretical position information to obtain actual position information;
and (3) a correction system: and the correction module is used for correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
Preferably, the mapping system comprises:
a feature point determination unit: the characteristic points are used for obtaining the characteristic points of the actual cloth according to the image of the actual cloth, and all the characteristic points are respectively in one-to-one correspondence with different reference points of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points, so that the actual position information is obtained.
Preferably, the mapping system comprises:
a feature point determination unit: the characteristic surface is used for obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, and the characteristic surface corresponds to a reference surface of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
Preferably, the correction system comprises:
theoretical distance determination unit: the theoretical distance between a theoretical preset point on the edge of the pattern presented by the theoretical position information and a reference object is obtained, and the reference object is located at an absolute position relative to the image of the theoretical cloth and the image of the actual cloth;
an actual preset point determining unit: the device is used for determining an actual preset point on the edge of the pattern presented by the actual position information according to the position relation of the theoretical preset point relative to the preset pattern;
an actual distance determination unit: the distance acquisition module is used for acquiring the actual distance between the actual preset point and a reference object;
a positional deviation adjustment unit: and the position of the actual preset point is adjusted according to the difference between the theoretical distance and the actual distance, so that the corrected position information of the preset pattern relative to the image of the actual cloth is obtained.
The invention also provides a cutting bed, which comprises the alignment device of the cloth strip lattice.
Compared with the background technology, the alignment method of the fabric strip lattices provided by the invention firstly obtains the actual shape and size of the preset pattern and the theoretical position information of the preset pattern relative to the strip lattices on the theoretical fabric according to the requirements of customers, and obtains the image of the actual fabric based on the actual processed actual fabric in the actual production process; mapping a preset pattern to an image of actual cloth according to the theoretical position information to obtain actual position information; because the actual cloth processed actually has deviation compared with the theoretical cloth, the theoretical position information and the actual position information have deviation; and finally, correcting the actual position information according to the actual shape and size of the preset pattern, and finally obtaining the corrected position information of the preset pattern relative to the image of the actual cloth. So set up, avoided artifical alignment operation, and can guarantee that final pattern shape and size is unanimous with the actual shape and size of predetermineeing the pattern, shortened the finish time, need not secondary smart sanction, both improved production efficiency, practiced thrift the cloth again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for aligning fabric panels according to an embodiment of the present invention;
fig. 2 is a block diagram of an alignment apparatus for fabric panels according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a method for aligning fabric bars according to an embodiment of the present invention when acquiring actual shape and size of a preset pattern and theoretical position information of the preset pattern relative to the bars on a theoretical fabric;
fig. 4 is a schematic diagram of an alignment method of fabric panels according to an embodiment of the present invention when an image of an actual fabric is obtained;
fig. 5 is a schematic diagram of a method for aligning fabric panels according to an embodiment of the present invention when selecting a feature point template;
fig. 6 is a schematic diagram of the alignment method of cloth strips according to the embodiment of the present invention when searching for a matching point;
fig. 7 is a schematic diagram illustrating a preset pattern mapped onto an actual fabric image according to theoretical position information according to the alignment method for fabric panels according to the embodiment of the present invention;
fig. 8 is a schematic diagram of the alignment method of fabric strips according to the embodiment of the present invention when correcting actual position information.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention provides an aligning method of cloth strips, as shown in the attached figure 1 of the specification, comprising the following steps:
s1, acquiring the actual shape and size of the preset pattern, theoretical position information of the preset pattern relative to the bars on the theoretical cloth and an image of the actual cloth;
s2, mapping the preset pattern to an image of actual cloth according to the theoretical position information to obtain actual position information;
and S3, correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
Aiming at the step S1, the preset pattern is the pattern to be finally cut, and the specific shape and size of the preset pattern can be determined according to different requirements of the customer; as shown in the attached figure 3 of the specification, modeling can be performed in different types of CAD software, a CAD graph of a preset pattern is loaded, information such as the width of a checked fabric and the pattern period is input, theoretical lattice point alignment is performed according to the CAD graph and cloth information, and therefore the requirements of a user for the checks are defined. In other words, in the actual production process, the specific cut piece must be at a specific position, and the step of determining the theoretical position information is also to place the specific cut piece at the specific position according to the actual production requirement.
In the actual processing link, the actual cloth is conveyed to the cutting area, the image of the actual cloth is collected by the image collecting device, and the image of the actual cloth is transmitted to the image processing device (which can be a computer or the like), as shown in the attached figure 4 of the specification.
For step S2, it can be simply considered as a mapping process from the theoretical cloth to the image of the actual cloth; the theoretical position information in steps S1 and S2 should include three layers, one of which is the position relationship (including the size and shape of the bars) between the bars on the theoretical fabric, and the other is the size and shape of the preset pattern; and thirdly, presetting the position relation of the pattern relative to the bars on the theoretical cloth.
In step S2, according to the image processing method in the prior art, the images of the theoretical cloth and the actual cloth are first mapped one to one, that is, the position relationship between the bars on the theoretical cloth is mapped to the image of the actual cloth, so that the CAD drawing of the theoretical cloth corresponds to the image of the actual cloth; and then mapping a preset pattern on the CAD graph of the theoretical cloth to an image of the actual cloth to obtain actual position information, as shown in the attached figure 7 of the specification.
Because the deviation exists between the theoretical cloth and the actual cloth after actual processing, when the CAD drawing of the theoretical cloth corresponds to the image of the actual cloth, and then the preset pattern (the shape and the size of the cut piece actually required) on the CAD drawing of the theoretical cloth is mapped onto the image of the actual cloth, the shape and the size of the pattern carried by the actual position information on the image of the actual cloth have deviation compared with the shape and the size of the preset pattern, and the deviation is caused by the deviation between the theoretical cloth and the actual cloth.
In step S3, the actual position information is corrected according to the shape and size of the preset pattern on the CAD drawing of the theoretical cloth (the shape and size of the cut pieces actually required), that is, the size of the preset pattern on the image of the actual cloth is corrected, so as to ensure that the specific shape and size of the preset pattern is the same as the specific shape and size of the pattern obtained in the actual cloth.
For step S2, it may specifically be:
obtaining characteristic points of the actual cloth according to the image of the actual cloth, wherein all the characteristic points correspond to different reference points of the theoretical cloth one by one respectively;
and mapping the preset pattern to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points to obtain the actual position information.
Aiming at the definition of the characteristic points, for the stripe cloth, the center of the characteristic point is only required to be positioned on the stripe, and the characteristic points of the stripe can be matched by adopting a set interval; the number of the characteristic points is related to two factors, one is the cycle period of the stripes or the grids, and the other is the size of the cloth; the larger the size of the same type of cloth, the more feature points.
Specifically, a first matching point is randomly found at the center of an image of an actual cloth, then the cloth is extended and searched in four directions according to the circulation period information of the cloth input by a user and the search is stopped until the edge position is found (when in actual cutting, the left edge and the right edge of the image of the actual cloth are the left edge and the right edge of the cloth, and the upper edge and the lower edge of the cloth can automatically identify the position of the edge through some operations performed through an image statistical histogram).
For example, for the image of the actual cloth shown in fig. 4 of the specification, firstly, a feature point template shown in fig. 5 of the specification is selected, a best matching point is matched at the center position of the image, then, the length of one cycle period is increased to four directions respectively on the basis of the point main, a next matching point is searched, then, a new matching point is used for continuously searching downwards until all matching points are found, as shown in fig. 6 of the specification, the arrow direction shown in fig. 6 of the specification is the searching direction, and six feature points (matching points) are shown in fig. 6 and are shown in a cross shape.
Simply put, through the one-to-one correspondence of points and points, an image can be divided into a plurality of rectangular areas according to points, each rectangular area can be used as a reference according to four vertexes, 6 equation sets can be listed according to coordinates of four groups of corresponding points, so that an anti-reflection transformation matrix is solved, and each point in the rectangular area in CAD is mapped by using the transformation matrix of the area.
Of course, step S2 may also be specifically:
obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, wherein the characteristic surface corresponds to a reference surface of the theoretical cloth;
and mapping the preset pattern to an image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
Similar to the one-to-one correspondence of the points, the plane-to-plane relationship refers to that a CAD coordinate system (coordinate system of a CAD graph of theoretical cloth) is regarded as a standard plane, an image of actual cloth is regarded as another plane, an analytical equation of the plane can be calculated according to the coordinates of reference points in CAD, an approximate equation of the plane can be calculated according to the coordinates of characteristic points found in the image of the actual cloth, a mapping equation from the CAD plane to the plane of the cloth image can be calculated according to the one-to-one correspondence of the characteristic points and the reference points, all the points on the CAD are transformed by using the equation, and can be mapped to the cloth image, and therefore the mapping of the whole cutting graph is completed.
Of course, according to actual needs, other manners may also be adopted for the mapping manner in step S2, which will not be described herein again.
The step S3 specifically includes:
acquiring a theoretical distance between a theoretical preset point on the edge of the pattern presented by the theoretical position information and a reference object, wherein the reference object is located at an absolute position relative to the image of the theoretical cloth and the image of the actual cloth;
determining an actual preset point on the edge of the pattern presented by the actual position information according to the position relation of the theoretical preset point relative to the preset pattern;
acquiring an actual distance between an actual preset point and a reference object;
and adjusting the position of the actual preset point according to the difference between the theoretical distance and the actual distance to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
The reference object can be specifically set as two mutually perpendicular reference axes or a geometric center point of a pattern presented by theoretical position information; of course, according to actual needs, other characteristic lines can be set as references for correction.
Referring to the attached drawing 8 of the specification, after obtaining the mapped cutting graph (after mapping the preset pattern to the image of the actual cloth according to the theoretical position information and obtaining the actual position information), comparing all the cut pieces (the pattern presented by the actual position information) with the theoretical size one by one, selecting reference axes in two directions inside the cut pieces, if the reference axes are predefined by a user inside the cut pieces, using the predefined reference axes, if the reference axes are not predefined, selecting the horizontal and vertical centers of the cut pieces as the reference axes, and ensuring the distance d from all the points on the cut pieces to the two axes1、d2Keeping the size of the cut pieces unchanged to meet the requirement of ensuring that the size of the cut pieces is completely consistent with a theoretical value.
The invention also provides a device for aligning the cloth strips, as shown in the attached figure 2 of the specification, comprising:
the acquisition system 101: the device is used for acquiring the actual shape and size of the preset pattern, theoretical position information of the preset pattern relative to the bars on the theoretical cloth and an image of the actual cloth;
the mapping system 102: the device is used for mapping a preset pattern to an image of actual cloth according to theoretical position information to obtain actual position information;
the correction system 103: and the correction module is used for correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
Wherein, mapping system 102 includes:
a feature point determination unit: the characteristic points are used for obtaining the characteristic points of the actual cloth according to the image of the actual cloth, and all the characteristic points are respectively in one-to-one correspondence with different reference points of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points to obtain the actual position information.
Alternatively, the first and second electrodes may be,
the mapping system 102 includes:
a feature point determination unit: the characteristic surface is used for obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, and the characteristic surface corresponds to a reference surface of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
Wherein, correction system 103 includes:
theoretical distance determination unit: the device comprises a theoretical position information acquisition unit, a data acquisition unit and a data processing unit, wherein the theoretical position information acquisition unit is used for acquiring a theoretical distance between a theoretical preset point on the edge of a pattern presented by the theoretical position information and a reference object, and the reference object is located at an absolute position relative to an image of theoretical cloth and an image of actual cloth;
an actual preset point determining unit: the device is used for determining the actual preset points on the edges of the patterns presented by the actual position information according to the position relation of the theoretical preset points relative to the preset patterns;
an actual distance determination unit: the distance measuring device is used for obtaining the actual distance between the actual preset point and the reference object;
a positional deviation adjustment unit: and the correction position information is used for adjusting the position of the actual preset point according to the difference value between the theoretical distance and the actual distance to obtain the correction position information of the preset pattern relative to the image of the actual cloth.
The working process of the alignment device of the cloth strip lattices is consistent with the alignment method of the cloth strip lattices, and the details are not repeated herein.
The invention also provides a cutting bed, which comprises the alignment device of the cloth strip lattices, and the arrangement mode of other parts of the cutting bed can refer to the prior art, and the cutting bed is not unfolded.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The present invention provides a cutting bed, a device for aligning fabric strips, and a method for aligning fabric strips. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A method for aligning fabric panels, comprising:
acquiring the actual shape and size of a preset pattern, theoretical position information of the preset pattern relative to a strip lattice on theoretical cloth and an image of the actual cloth;
mapping the preset pattern to the image of the actual cloth according to the theoretical position information to obtain actual position information;
correcting the actual position information according to the actual shape and size of the preset pattern to obtain corrected position information of the preset pattern relative to the image of the actual cloth;
wherein the step of correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth material specifically comprises:
acquiring a theoretical distance between a theoretical preset point on the edge of the pattern presented by the theoretical position information and a reference object, wherein the reference object is located at an absolute position relative to the image of the theoretical cloth and the image of the actual cloth;
determining an actual preset point on the edge of the pattern presented by the actual position information according to the position relation of the theoretical preset point relative to the preset pattern;
acquiring an actual distance between the actual preset point and a reference object;
and adjusting the position of the actual preset point according to the difference between the theoretical distance and the actual distance to obtain the corrected position information of the preset pattern relative to the image of the actual cloth.
2. The alignment method according to claim 1, wherein the step of mapping the preset pattern onto the image of the actual cloth according to the theoretical position information to obtain the actual position information comprises:
obtaining characteristic points of the actual cloth according to the image of the actual cloth, wherein all the characteristic points correspond to different reference points of the theoretical cloth one by one respectively;
and mapping the preset pattern to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points to obtain the actual position information.
3. The alignment method according to claim 1, wherein the step of mapping the preset pattern onto the image of the actual cloth according to the theoretical position information to obtain the actual position information comprises:
obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, wherein the characteristic surface corresponds to a reference surface of the theoretical cloth;
and mapping the preset pattern to the image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
4. The alignment method according to claim 1, wherein the reference object is specifically two reference axes perpendicular to each other or a geometric center point of a pattern presented by the theoretical position information.
5. An apparatus for aligning a fabric strip grid, comprising:
an acquisition system: the device comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for acquiring the actual shape and size of a preset pattern, theoretical position information of the preset pattern relative to a strip lattice on theoretical cloth and an image of the actual cloth;
the mapping system comprises: the preset pattern is mapped to the image of the actual cloth according to the theoretical position information to obtain actual position information;
and (3) a correction system: the correction position information is used for correcting the actual position information according to the actual shape and size of the preset pattern to obtain the corrected position information of the preset pattern relative to the image of the actual cloth;
wherein the correction system comprises:
theoretical distance determination unit: the theoretical distance between a theoretical preset point on the edge of the pattern presented by the theoretical position information and a reference object is obtained, and the reference object is located at an absolute position relative to the image of the theoretical cloth and the image of the actual cloth;
an actual preset point determining unit: the device is used for determining an actual preset point on the edge of the pattern presented by the actual position information according to the position relation of the theoretical preset point relative to the preset pattern;
an actual distance determination unit: the distance acquisition module is used for acquiring the actual distance between the actual preset point and a reference object;
a positional deviation adjustment unit: and the position of the actual preset point is adjusted according to the difference between the theoretical distance and the actual distance, so that the corrected position information of the preset pattern relative to the image of the actual cloth is obtained.
6. The alignment device of claim 5, wherein the mapping system comprises:
a feature point determination unit: the characteristic points are used for obtaining the characteristic points of the actual cloth according to the image of the actual cloth, and all the characteristic points are respectively in one-to-one correspondence with different reference points of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between all the characteristic points and all the reference points, so that the actual position information is obtained.
7. The alignment device of claim 5, wherein the mapping system comprises:
a feature point determination unit: the characteristic surface is used for obtaining a characteristic surface of the actual cloth according to the image of the actual cloth, and the characteristic surface corresponds to a reference surface of the theoretical cloth;
an actual position information determination unit: and the preset pattern is mapped to the image of the actual cloth through the theoretical position information according to the corresponding relation between the characteristic surface and the reference surface to obtain the actual position information.
8. A cutting bed, characterized in that it comprises an alignment device for a fabric strip grid according to any one of claims 5 to 7.
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