CN114162376B - Method and device for detecting appearance quality of tobacco packet - Google Patents
Method and device for detecting appearance quality of tobacco packet Download PDFInfo
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- CN114162376B CN114162376B CN202111406024.3A CN202111406024A CN114162376B CN 114162376 B CN114162376 B CN 114162376B CN 202111406024 A CN202111406024 A CN 202111406024A CN 114162376 B CN114162376 B CN 114162376B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B19/00—Packaging rod-shaped or tubular articles susceptible to damage by abrasion or pressure, e.g. cigarettes, cigars, macaroni, spaghetti, drinking straws or welding electrodes
- B65B19/28—Control devices for cigarette or cigar packaging machines
- B65B19/30—Control devices for cigarette or cigar packaging machines responsive to presence of faulty articles, e.g. incorrectly filled cigarettes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
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Abstract
The application discloses a tobacco bale appearance quality detection method and a tobacco bale appearance quality detection device. The method for detecting the appearance quality of the tobacco bale comprises the following steps of obtaining a tobacco bale image, wherein the tobacco bale image comprises a tobacco bale body and a seal; correcting the position of the tobacco bale body by using a first coordinate system of the image detection model, and detecting target features on the tobacco bale body by using a first detection area in the first coordinate system; and correcting the position of the seal by using a second coordinate system of the image detection model and detecting the edge of the seal by using a second detection area in the second coordinate system. According to the technical scheme, the position of the object where the detection target is located is corrected, so that the position of the detection area can be changed along with the position of the object where the detection target is located, and therefore appearance defects are accurately identified, and detection accuracy is improved.
Description
Technical Field
The application relates to a tobacco packet appearance quality detection method and a tobacco packet appearance quality detection device.
Background
In the tobacco bale production technology, the traditional tobacco bale appearance quality detection device can detect quality defects of a preset area in the appearance of the package. The adopted detection method is that a camera is used for shooting and obtaining pictures of the cigarette packet, different detection areas are set on the pictures at the same time, the brightness value, the color value and other characteristics of the images in each detection area are obtained, then the characteristics are compared with the characteristics of the standard images, and the quality defect of the package in the corresponding area is indicated when the characteristics deviate from the set limit value. How to improve the detection accuracy is a constant problem in the industry.
Disclosure of Invention
The application provides a tobacco bale appearance quality detection method and a tobacco bale appearance quality detection device, so as to improve detection accuracy.
The first aspect of the application provides a method for detecting appearance quality of a tobacco packet, comprising the following steps:
acquiring a tobacco packet image, wherein the tobacco packet image comprises a tobacco packet body and a seal;
correcting the position of the tobacco bale body by using a first coordinate system of the image detection model, and detecting target features on the tobacco bale body by using a first detection area in the first coordinate system; and
and correcting the position of the seal by using a second coordinate system of the image detection model and detecting the corners of the seal by using a second detection area in the second coordinate system.
In some embodiments, the first coordinate system includes a first abscissa axis and a first ordinate axis disposed vertically, and the position correction of the pack body in the first coordinate system includes: the first edge line and the second edge line of the pack body are detected such that the first edge line coincides with the first axis of abscissa and the second edge line coincides with the first axis of ordinate.
In some embodiments, the first detection zone is fixedly disposed within the first coordinate system.
In some embodiments, the second coordinate system includes a second abscissa axis and a second ordinate axis disposed vertically, and the position correcting the tag with the second coordinate system and detecting the corner of the tag with a second detection area in the second coordinate system includes: the first edge line and the second edge line of the tag are detected such that the first edge line and the second axis of abscissa of the tag coincide and the second edge line and the second axis of ordinate of the tag coincide.
In some embodiments, the second detection zone is fixedly disposed within the second coordinate system.
In some embodiments, detecting the corner of the tag with a second detection zone in a second coordinate system includes: and detecting at least two corners of the seal by using at least two second detection areas arranged at intervals in the second coordinate system.
In some embodiments, detecting the corner of the tag with a second detection zone in the second coordinate system includes determining whether the corner of the tag is folded based on a change in color pixel values in the second detection zone.
In some embodiments, the method for detecting the appearance quality of the tobacco packet further comprises sending out an abnormal prompt and/or rejecting the abnormal tobacco packet when the image detection model finds an abnormality.
A second aspect of the present application provides a pack appearance quality detection device, comprising:
the image acquisition device is used for acquiring a tobacco packet image, and the tobacco packet image comprises a tobacco packet body and a seal; and
and the controller is configured to acquire a tobacco packet image from the image acquisition device, correct the position of the tobacco packet body by using a first coordinate system of the image detection model, detect the target feature on the tobacco packet body by using a first detection area in the first coordinate system, correct the position of the seal by using a second coordinate system of the image detection model, and detect the edge of the seal by using a second detection area in the second coordinate system.
In some embodiments, the system further comprises a rejecting device which is in signal connection with the controller, and when the image detection model finds abnormality, the controller controls the rejecting device to reject the abnormal tobacco packet.
Based on the technical scheme provided by the application, the position of the object where the detection target is located is corrected, so that the position of the detection area can be changed along with the position of the object where the detection target is located, thereby realizing accurate identification of appearance defects and improving detection accuracy. And this application all carries out dual position correction through tobacco bale body and facing slip, and then can synthesize the target feature that improves on the tobacco bale body and carry out the accuracy that detects to the corner of facing slip.
Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the present application, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
fig. 1 is a schematic diagram of appearance detection of a target feature of a tobacco packet.
Fig. 2 is another schematic illustration of appearance detection of a target feature of a tobacco packet.
Fig. 3 is a schematic view of a tobacco pouch with a label.
FIG. 4 is a schematic view of a seal with a corner fold.
Fig. 5 is a schematic view of the appearance of the folded corner of the pack.
Fig. 6 is another schematic view of the appearance of the folded corner of the pack.
Fig. 7 is a further schematic view of the appearance of the corner of the pack.
Fig. 8 is a step diagram of a method for detecting appearance quality of a tobacco packet according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways and the spatially relative descriptions used herein are construed accordingly.
As mentioned above, the detection method adopted by the cigarette packet appearance quality detection device is to take the picture of the cigarette packet by using the camera, and set different detection areas on the picture at the same time, so as to obtain the brightness value, color value and other characteristics of the image in each detection area, and then compare these characteristics with the characteristics of the standard image, and when the deviation from the set limit value indicates that the package in the corresponding area has quality defects.
Fig. 1 shows a schematic diagram for detecting target characteristics of a tobacco packet, and fig. 1 shows an acquired tobacco packet image, where the tobacco packet image includes a tobacco packet body 11, and target characteristics 12 are arranged on the tobacco packet body 11, and the target characteristics 12 may be graphics or text. The dashed box is the first detection area 21, the pixel size of the target feature 12 is obtained in the first detection area 21 during detection, the upper limit value and the lower limit value of the pixel are set, and if the pixel size exceeds the limit range, the target feature of the area is abnormal. The inventors found in the study that when the packets of cigarettes pass through the camera, the positions of the packets of cigarettes are not exactly the same when the camera shoots the images of the packets of cigarettes, and the first detection area 21 is fixed, so that the images in the first detection area 21 deviate from the center of the area due to the change of the positions of the packets of cigarettes when shooting, as shown in fig. 2, when the position deviation of the packets of cigarettes is large, the target feature 12 partially or completely runs out of the first detection area 21, and in fact, the target feature 12 is located at the normal position of the packet 11, so that the normal packet of cigarettes is detected as an abnormal packet of cigarettes, and false detection is generated.
As shown in fig. 3, some cigarette packages, such as soft package cigarette packages, need to be additionally stuck with a seal 13 on the outer package, and when the seal 13 is stuck on the outer package, the position is not fixed, and the phenomena of left-right offset, front-back length and the like can exist. The deviation of the position of the seal 13 is judged to be qualified as long as the deviation is within the standard requirement range, and the length of the seal is not more than 5 mm. As shown in fig. 4, the label 13 may cause a corner during the adhering process, which is one of the defects in the appearance quality of the pack. In order to detect the corner defect of the seal, as shown in fig. 5, two second detection areas 22 are generally set at two corners of the seal 13, and then whether the corner is generated is determined according to the change of the color pixel values in the two second detection areas 22.
However, as shown in fig. 6, when the left and right positions of the seal 13 are shifted, the image in the second detection area 22 is deviated from the second detection area 22 due to the shift of the position of the seal 13, so that the change of the color pixel value in the second detection area 22 conforms to the characteristic of the folded angle, but in fact, the seal 13 does not have the folded angle, thereby causing false detection.
As shown in fig. 7, when the position of the seal 13 in the longitudinal direction is shifted, the image in the second detection area 22 is shifted from the corner area of the seal due to the shift of the position of the seal 13, as shown in fig. 7, the change of the color pixel value in the second detection area 22 is a characteristic of the non-corner, but the seal 13 is actually corner, so that false detection is caused.
As a result of intensive studies, the inventors of the present application have found that the above false detection is caused by not locating the position of the detection target. For example, if the position of the tobacco bale is offset, if the position of the tobacco bale after the offset can be corrected, false detection caused by the offset of the position of the tobacco bale can be avoided. Similarly, when the position of the seal is shifted, if the position of the seal after the shift can be corrected, false detection caused by the shift of the position of the seal can be avoided.
Referring to fig. 8, an embodiment of the present application provides a method for detecting appearance quality of a tobacco packet, including the following steps:
s100, acquiring a tobacco packet image, wherein the tobacco packet image comprises a tobacco packet body and a seal;
s200, correcting the position of the tobacco bale body by using a first coordinate system of the image detection model, and detecting target features on the tobacco bale body by using a first detection area in the first coordinate system; and
s300, correcting the position of the seal by using a second coordinate system of the image detection model and detecting the edge of the seal by using a second detection area in the second coordinate system.
In particular, acquiring the pack image includes photographing the pack with a photographing device to obtain the pack image. The tobacco bale image is a two-dimensional image, and the tobacco bale image comprises a tobacco bale body and a seal.
The position correction of the tobacco bale body by using the first coordinate system of the image detection model refers to that two mutually perpendicular edge lines of the tobacco bale body are overlapped with two mutually perpendicular coordinate axes of the first coordinate system. For example, referring to fig. 2, when the pack body is dislocated in the left-right direction during the conveying process, the image detection model detects the first edge line 111 and the second edge line 112 of the pack body 11, and makes the first edge line 111 coincide with the first abscissa axis of the first coordinate system, and the second edge line 112 coincides with the first ordinate axis of the first coordinate system, so that the position of the first detection area relative to the pack body 11 is the same as the position of the standard image in the image detection model, and further the detection of the target feature 12 can be achieved. For another example, when the obtained tobacco bale image is inclined with respect to the first coordinate system, for example, an included angle is formed between the first edge line 111 of the tobacco bale image and the first abscissa axis of the first coordinate system, the tobacco bale body may also be subjected to position correction by using the first coordinate system, specifically, the angle of the first coordinate system may be adjusted so that two coordinate axes of the first coordinate system and two edge lines of the tobacco bale body 11 respectively coincide, and the angle of the tobacco bale body may also be adjusted so that two coordinate axes of the first coordinate system and two edge lines of the tobacco bale body 11 respectively coincide.
Specifically, the image detection model may detect the edge line of the pack body 11 through the characteristics of brightness values, color values, and the like.
The correction of the position of the tag by using the second coordinate system of the image detection model means that two edge lines perpendicular to each other of the tag coincide with two coordinate axes perpendicular to each other of the second coordinate system. Referring to fig. 6, when the tag is misaligned in the left-right direction, the position of the second detection area 22 is returned to the preset detection position by detecting the edge line of the tag and causing the edge line of the tag to coincide with the coordinate axes of the second coordinate system. Referring to fig. 7, when there is a misalignment in the length direction of the label, for example, the length of the label extending to the front of the pack body 11 is long, by detecting the edge line of the label and causing the edge line of the label to coincide with the coordinate axes of the second coordinate system, the position of the second detection area 22 is returned to the preset detection position accordingly.
In the technical scheme of the embodiment of the application, the position of the object where the detection target is located is corrected, so that the position of the detection area can be changed along with the position of the object where the detection target is located, thereby realizing accurate identification of appearance defects and improving detection accuracy. In addition, the embodiment of the application carries out position correction on the tobacco bale body and the seal, so that the target characteristics on the tobacco bale body and the accuracy of detecting the corners of the seal can be comprehensively improved.
In some embodiments, the first coordinate system includes a first abscissa axis and a first ordinate axis disposed vertically, and the position correction of the pack body in the first coordinate system includes: the first edge line and the second edge line of the pack body are detected such that the first edge line coincides with the first axis of abscissa and the second edge line coincides with the first axis of ordinate.
Since the two edge lines of the pack body are vertically arranged, the first coordinate system with the vertically arranged first abscissa axis and first ordinate axis is adopted to carry out position correction on the pack body, so that positioning is simple. Of course, in other embodiments, other forms of coordinate systems may be adopted, so long as after the position of the tobacco bale body is corrected, the position of each tobacco bale body is relatively fixed with respect to the position of the coordinate system, and further the position of the detection area is fixed with respect to the position of the tobacco bale body, so that the problem of false detection caused by the change of the position of the tobacco bale body is avoided.
In some embodiments, the first detection zone 21 is fixedly disposed within the first coordinate system. The first detection area is fixedly arranged in the first coordinate system, so that the mutual position between the first coordinate system and the tobacco bale body is only required to be adjusted, and further, the position correction is simplified. For example, the position of the first detection region may be defined by setting coordinate values of the first detection region within the first coordinate system.
Specifically, in some embodiments, as shown in fig. 2, the first detection area 21 is square, although in other embodiments, the first detection area may have other shapes. The first detection zone is here a virtual concept and it is not necessary to draw the dashed box in the pack image.
In some embodiments, the second coordinate system includes a second abscissa axis and a second ordinate axis disposed vertically, and the position correction of the tag in the second coordinate system and the detection of the corner of the tag 13 using the second detection area in the second coordinate system includes: the first edge line and the second edge line of the tag are detected such that the first edge line and the second axis of abscissa of the tag coincide and the second edge line and the second axis of ordinate of the tag coincide.
Likewise, the tag 13 is rectangular, so that the two edge lines of the tag 13 are vertically arranged, and thus the second coordinate system having the vertically arranged second abscissa axis and second ordinate axis is used to perform the position correction on the pack body, so that the positioning is simple. Of course, for other embodiments, such as a seal with an oval shape, the second coordinate system may also be used to locate its edge line. The second coordinate system having the vertically arranged second abscissa axis and second ordinate axis has a wider application range, and can be used for positioning various types of tags.
In some embodiments, the second detection zone is fixedly disposed within the second coordinate system. The second detection area is fixedly arranged in the second coordinate system, so that the mutual position between the second coordinate system and the tobacco bale body is only required to be adjusted, and further, the position correction is simplified. For example, the position of the second detection region may be defined by setting coordinate values of the second detection region within the second coordinate system.
In some embodiments, detecting the corners of the tag 13 with a second detection zone in a second coordinate system includes: at least two corners of the tag are detected by at least two second detection areas 22 arranged at intervals in the second coordinate system.
As shown in fig. 5, the tag 13 has two corners. The corners refer to the corners of the ends of the tag 13. The two corresponding second detection areas 22 are arranged to detect the two corners of the seal 13 respectively, so that comprehensive detection is realized.
Of course, in other embodiments, the extent of the second detection zone may be increased, for example, so that the second detection zone covers both corners of the tag 13, so that a full detection is also possible.
In some embodiments, detecting the corners of the tag 13 with a second detection zone in the second coordinate system includes determining whether a corner break has occurred in the tag 13 based on a change in color pixel values in the second detection zone. Specifically, for example, in the embodiment shown in fig. 5, when a corner of the label 13 is folded, at least a part of the color in the second detection area is different from another part of the color, so that whether the corner is folded or not can be determined according to the color pixel value change in the second detection area.
In each of the above embodiments, the second coordinate system and the first coordinate system are parallel to each other. Of course, in other embodiments, the second coordinate system may also be arranged obliquely with respect to the first coordinate system. For example, when the position of the tag 13 is tilted at a small angle with respect to the body of the pack, then aligning the second coordinate system with the edge line of the tag 13 with respect to the position of the tag 13 may cause the second coordinate system to tilt with respect to the first coordinate system, where tilting refers to tilting of the two coordinate axes of the second coordinate system with respect to the corresponding coordinate axes of the first coordinate system, but not parallel. For example, the second ordinate axis of the second coordinate system has an angle with the first ordinate axis of the first coordinate system.
The embodiment of the application also provides a tobacco bale appearance quality detection device, which comprises an image acquisition device and a controller. The image acquisition device is used for acquiring a tobacco package image, and the tobacco package image comprises a tobacco package body and a seal. The controller is configured to obtain a pack image from the image acquisition device, position modify the pack body with a first coordinate system of the image detection model and detect a target feature on the pack body with a first detection zone in the first coordinate system, and position modify the seal with a second coordinate system of the image detection model and detect a corner of the seal with a second detection zone in the second coordinate system.
In the technical scheme of the embodiment of the application, the controller corrects the position of the object where the detection target is located, so that the position of the detection area can be changed along with the position of the object where the detection target is located, thereby realizing accurate identification of the appearance defect and improving the detection accuracy. In addition, the embodiment of the application carries out position correction on the tobacco bale body and the seal, so that the target characteristics on the tobacco bale body and the accuracy of detecting the corners of the seal can be comprehensively improved.
Specifically, the controller needs to perform position correction during image processing to ensure that the detection areas are at fixed positions of the cigarette packets, so that each detection area always detects the fixed positions of the cigarette packets without deviation.
Further, in order to reject the abnormal tobacco packages, the tobacco package appearance quality detection device further comprises a rejection device which is connected with the controller in a signal mode, and when the image detection model finds out that the abnormal tobacco packages are abnormal, the controller controls the rejection device to reject the abnormal tobacco packages.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application and not for limiting the same; although the present application has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments herein or equivalents may be substituted for part of the technical features; without departing from the spirit of the technical solutions of the present application, it should be covered in the scope of the technical solutions claimed in the present application.
Claims (8)
1. The method for detecting the appearance quality of the cigarette packet is characterized by comprising the following steps of:
acquiring a tobacco package image, wherein the tobacco package image comprises a tobacco package body and a seal;
performing position correction on the tobacco bale body by using a first coordinate system of an image detection model and detecting target features on the tobacco bale body by using a first detection area in the first coordinate system, wherein the first coordinate system comprises a first abscissa axis and a first ordinate axis which are vertically arranged, and performing position correction on the tobacco bale body by using the first coordinate system comprises: detecting a first edge line and a second edge line of the pack body such that the first edge line and the first axis of abscissa coincide, and the second edge line and the first axis of ordinate coincide; and
performing position correction on the seal by using a second coordinate system of an image detection model and detecting corners of the seal by using a second detection area in the second coordinate system, wherein the second coordinate system comprises a second abscissa axis and a second ordinate axis which are vertically arranged, performing position correction on the seal by using the second coordinate system and detecting corners of the seal by using the second detection area in the second coordinate system comprises: detecting the first edge line and the second edge line of the seal such that the first edge line and the second axis of abscissa of the seal coincide and the second edge line and the second axis of ordinate of the seal coincide.
2. The method of claim 1, wherein the first detection zone is fixedly disposed within the first coordinate system.
3. The method of claim 1, wherein the second detection area is fixedly disposed in the second coordinate system.
4. The method of claim 1, wherein detecting the corner of the label with a second detection zone in the second coordinate system comprises: and respectively detecting at least two corners of the seal by utilizing at least two second detection areas which are arranged at intervals in the second coordinate system.
5. The method according to any one of claims 1 to 4, wherein detecting the corner of the label with a second detection area in the second coordinate system includes determining whether or not the corner of the label is folded according to a change in color pixel value in the second detection area.
6. The method according to any one of claims 1 to 4, further comprising issuing an abnormality prompt and/or rejecting an abnormal tobacco packet when the image detection model finds an abnormality.
7. A pack appearance quality detection apparatus based on the pack appearance quality detection method according to any one of claims 1 to 6, comprising:
the image acquisition device is used for acquiring a tobacco packet image, and the tobacco packet image comprises a tobacco packet body and a seal; and
the controller is configured to acquire a tobacco bale image from the image acquisition device, correct the position of the tobacco bale body by using a first coordinate system of an image detection model, detect target features on the tobacco bale body by using a first detection area in the first coordinate system, correct the position of the seal by using a second coordinate system of the image detection model, and detect corners of the seal by using a second detection area in the second coordinate system.
8. The apparatus according to claim 7, further comprising a rejecting device in signal connection with the controller, the controller controlling the rejecting device to reject abnormal packets when the image detection model finds abnormality.
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| CN113552468B (en) * | 2021-07-15 | 2024-04-09 | 苏州浚泰新能源设备有限公司 | Quality detection and use method of PCB |
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