A method and system for evaluating the closing quality of the lid of a rigid carton

Abstract

The present invention discloses a method and system for evaluating the closing quality of the lid of a hard-pack small box. The method includes: after opening and closing the cigarette box lid of the hard-pack small box to be tested for a preset number of times, obtaining a sample of the hard-pack small box to be tested; acquiring a standard sample image of a standard hard-pack small box sample and a to-be-tested sample image of the hard-pack small box sample to be tested; respectively detecting the graphic and text information of the surface main body and the lid part according to the standard sample image and the to-be-tested sample image, and respectively obtaining the position information of the surface main body and the lid part according to the graphic and text information; and obtaining an evaluation result of the closing quality of the lid of the to-be-tested sample based on the position information. The method and system for evaluating the closing quality of the lid of a hard-pack small box according to the present invention accurately quantify the evaluation of the lid slit through image processing technology, and quickly obtain the detection result by comparing with standard parameters during the detection process. Compared with the manual slit determination method, the accuracy is higher, and problems such as inconsistent discrimination scales, empiricism, and individualization are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of cigarette production, and particularly relates to a method and a system for evaluating the closing quality of the lid of a hard pack small box. Background Art

[0002] At present, smokers' requirements for the appearance style and quality of product packaging are increasing day by day. During the process of smokers taking cigarettes from the cigarette case, the cigarette case lid needs to be opened and closed multiple times. The process of opening the cigarette pack can make smokers feel happy mentally. The firmness of the box body and the smoothness of opening and closing during the opening and closing process of the cigarette pack have a subtle psychological impact on smokers. At the same time, the cigarette case lid can better preserve the moisture of the cigarettes by remaining tightly closed after being opened and closed multiple times, which affects the smoking taste of the cigarettes. Therefore, by evaluating the closing quality of the cigarette case lid, it can be determined whether the corresponding cigarette pack materials, die-cutting dimensions, etc. can meet consumer satisfaction and ensure the smoking evaluation experience of cigarettes.

[0003] Therefore, there is an urgent need for a method and a system for evaluating the closing quality of the lid of a hard pack small box. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and a system for evaluating the closing quality of the lid of a hard pack small box to solve the above problems in the prior art and be able to accurately quantify and evaluate the lid slit.

[0005] The present invention provides a method for evaluating the closing quality of the lid of a hard pack small box, which includes the following steps:

[0006] After opening and closing the cigarette case lid of the hard pack small box containing cigarettes for a preset number of times, a sample of the hard pack small box to be tested is obtained;

[0007] Respectively obtain a standard sample image corresponding to a standard hard pack small box sample containing cigarettes that has not been opened and closed and a to-be-tested sample image corresponding to the hard pack small box sample to be tested containing cigarettes;

[0008] According to the standard sample image and the to-be-tested sample image, respectively detect the graphic and text information on the surface main body and the lid part of the standard hard pack small box sample and the hard pack small box sample to be tested, and respectively obtain the position information of the surface main body and the lid part corresponding to the standard hard pack small box sample and the hard pack small box sample to be tested according to the graphic and text information;

[0009] Based on the position information of the surface main body and the lid part corresponding to the standard hard pack small box sample and the hard pack small box sample to be tested, obtain the evaluation result of the closing quality of the lid of the hard pack small box sample to be tested.

[0010] The method for evaluating the closing quality of the lid of a hard pack small box as described above, wherein preferably, after opening and closing the cigarette case lid of the hard pack small box containing cigarettes for a preset number of times to obtain a sample to be detected, specifically includes:

[0011] Manually tear off the drawstring and the BOPP film at the box cover of the cigarette pack sample containing cigarettes, open the box cover of the cigarette pack, close the box cover after tearing off the inner lining paper piece, and place the sample in the cigarette pack positioning groove;

[0012] Start the power supply and compressed air, control the pneumatic pressure rod through the controller to drive the box cover opening and closing device to change positions, open the box cover of the cigarette pack, and obtain the sample to be tested after opening and closing 15 to 25 times.

[0013] The method for evaluating the closing quality of the hard pack small box cover as described above, wherein, preferably, respectively obtaining the standard sample image corresponding to the standard hard pack small box sample containing cigarettes that has not been opened and closed and the test sample image corresponding to the hard pack small box sample to be tested containing cigarettes specifically includes:

[0014] Place the standard hard pack small box sample containing cigarettes that has not been opened and closed in the detection area of the sample stage, and obtain the image of the standard hard pack small box sample through the imaging device to obtain the standard sample image;

[0015] Place the hard pack small box to be tested containing cigarettes in the detection area of the sample stage, and obtain the image of the hard pack small box sample to be tested through the imaging device to obtain the test sample image.

[0016] The method for evaluating the closing quality of the hard pack small box cover as described above, wherein, preferably, before obtaining the standard sample image and the test sample image, the method for evaluating the closing quality of the hard pack small box cover further includes:

[0017] Turn on the light source device and adjust it to the preset illumination brightness, and adjust the position of the light source device so that the light source device irradiates on the detection table surface of the sample stage.

[0018] The method for evaluating the closing quality of the hard pack small box cover as described above, wherein, preferably, after obtaining the standard sample image and the test sample image, the method for evaluating the closing quality of the hard pack small box cover further includes:

[0019] Perform preprocessing on the standard sample image and the test sample image respectively, and the preprocessing specifically includes at least one of image grayscale processing, image filtering processing, and image enhancement processing.

[0020] The method for evaluating the closing quality of the hard pack small box cover as described above, wherein, preferably, according to the standard sample image and the test sample image, respectively detect the graphic and text information on the surface main body and the box cover part of the standard hard pack small box sample and the hard pack small box sample to be tested, and respectively obtain the position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the hard pack small box sample to be tested according to the graphic and text information, specifically including:

[0021] Based on the image of the sample to be measured, respectively identify the graphic information on the surface main body and the box cover part of the hard box sample to be measured, and obtain the corresponding position information of the surface main body and the box cover part according to the graphic information.

[0022] Based on the image of the standard sample, respectively identify the graphic information on the surface main body and the box cover part of the standard hard box sample, and obtain the corresponding position information of the surface main body and the box cover part according to the graphic information.

[0023] The method for evaluating the closing quality of the hard box cover as described above, wherein, preferably, the ORB feature extraction and matching algorithm is used to respectively identify the graphic information on the surface main body and the box cover part corresponding to the standard hard box sample and the hard box sample to be measured, and the corresponding position information is obtained based on the pixel information corresponding to the identified graphic information on the surface main body and the box cover part.

[0024] The method for evaluating the closing quality of the hard box cover as described above, wherein, preferably, based on the position information of the surface main body and the box cover part corresponding to the standard hard box sample and the hard box sample to be measured, the evaluation result of the closing quality of the box cover of the hard box sample to be measured is obtained, which specifically includes:

[0025] Compare the position differences between the surface main body and the box cover part corresponding to the hard box sample to be measured and the standard hard box sample to determine whether the hard box sample to be measured meets the preset position deviation standard. If it meets, the evaluation result of the closing quality of the box cover of the hard box sample to be measured is qualified.

[0026] The method for evaluating the closing quality of the hard box cover as described above, wherein, preferably, the comparison of the position differences between the surface main body and the box cover part corresponding to the hard box sample to be measured and the standard hard box sample to determine whether the hard box sample to be measured meets the preset position deviation standard specifically includes:

[0027] Compare the position deviations of the surface main body and the box cover part corresponding to the hard box sample to be measured and the standard hard box sample one by one. If the slit deviation between the two is greater than or equal to the deviation standard corresponding to the preset position, it is determined that the evaluation result of the closing quality of the box cover of the current hard box sample to be measured is unqualified.

[0028] The present invention also provides a system for evaluating the closing quality of a hard box cover, including:

[0029] A box cover opening and closing device for obtaining a hard box sample to be measured after opening and closing the cigarette box cover of the hard box to be measured containing cigarettes a preset number of times.

[0030] A sample image acquisition module, configured to respectively acquire a standard sample image corresponding to a standard hard pack small box sample containing a cigarette stick that is not opened and a to-be-tested sample image corresponding to a to-be-tested hard pack small box sample containing a cigarette stick;

[0031] A position information acquisition module, configured to respectively detect graphic and text information on the surface main body and the box cover part of the standard hard pack small box sample and the to-be-tested hard pack small box sample according to the standard sample image and the to-be-tested sample image, and respectively acquire position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample according to the graphic and text information;

[0032] A box cover closing quality evaluation module, configured to obtain a box cover closing quality evaluation result of the to-be-tested hard pack small box sample based on the position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample.

[0033] The present invention provides a method and a system for evaluating the closing quality of a hard pack small box. Through image processing technology, an accurate quantification evaluation of the box cover slit is carried out. During the detection process, by comparing with standard parameters, the detection result can be obtained quickly. Compared with the method of manually judging the slit mainly relying on visual inspection and ruler measurement, the accuracy is higher, and problems such as inconsistent discrimination scales, empirical and individualized inspection methods are avoided. Description of the Drawings

[0034] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described below in conjunction with the drawings, where:

[0035] Figure 1 is a flowchart of the method for evaluating the closing quality of a hard pack small box provided by the present invention;

[0036] Figure 2 is a schematic diagram of recognition region 1 and recognition region 2 corresponding to a standard hard pack small box sample;

[0037] Figure 3 is a schematic diagram of recognition region 1 and recognition region 2 corresponding to a to-be-tested hard pack small box;

[0038] Figure 4 is a structural block diagram of the system for evaluating the closing quality of a hard pack small box provided by the present invention. Detailed Embodiments

[0039] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present disclosure or its application or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions, and numerical values set forth in these embodiments should be construed as merely exemplary and not as limitations.

[0040] The terms "first", "second", and the like used in the present disclosure do not denote any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "comprising" mean that the elements before the term cover the elements listed after the term, and do not exclude the possibility of also covering other elements. Terms such as "upper", "lower", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0041] In the present disclosure, when it is described that a specific component is located between a first component and a second component, there may or may not be an intermediate component between the specific component and the first component or the second component. When it is described that a specific component is connected to other components, the specific component may be directly connected to the other components without an intermediate component, or may not be directly connected to the other components and have an intermediate component.

[0042] All terms used in the present disclosure (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be construed as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such herein.

[0043] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0044] The "smiling opening" quality defect of the cigarette case is caused by the force and deformation of the cigarette case during the process of smokers opening the cigarette case multiple times. During the detection process, due to the errors in the opening and closing techniques and forces of the detection personnel each time, the present invention uses a case lid opening and closing device to perform pre-treatment work on the case lid closing quality samples. This non-contact measurement method can effectively avoid errors caused by contact and human factors. When the cigarette case has the "smiling opening" quality defect, there is a certain height difference between the front case lid of the small case and the main body of the small case, and there is a width difference between the case lid and the case lid joint line of the main body of the small case. By collecting, analyzing the image of the front of the pre-treated case lid closing quality sample and comparing it with the flatness of the standard small case, the closing quality of the hard small case lid can be obtained. The present invention can provide an accurate quantification detection device and evaluation method for the "smiling opening" quality defect of the cigarette case.

[0045] As Figure 1 shown, the present invention also provides a method for evaluating the closing quality of the hard pack small case lid, including the following steps:

[0046] Step S1: After opening and closing the cigarette case lid of the hard pack small case to be tested containing cigarettes for a preset number of times, obtain the hard pack small case sample to be tested.

[0047] In an embodiment of the method for evaluating the closing quality of the hard pack small case lid of the present invention, the step S1 may specifically include:

[0048] Step S11: Manually tear off the pull line and the BOPP film at the case lid of the cigarette case sample containing cigarettes, open the cigarette case lid, tear off the inner lining paper tear piece and then close the case lid, and place the sample in the cigarette case positioning groove.

[0049] Step S12: Start the power supply and compressed air, control the pneumatic pressure rod through the controller to drive the case lid opening and closing device to change positions, open the cigarette case lid, and after opening and closing 15 to 25 times (for example, 20 times), obtain the sample to be detected.

[0050] The gap formed by the natural rebound after the case lid is closed is the case lid slit.

[0051] Step S2: Respectively obtain the standard sample image corresponding to the standard hard pack small case sample containing cigarettes that has not been opened and closed and the test sample image corresponding to the hard pack small case sample to be tested containing cigarettes.

[0052] In an embodiment of the method for evaluating the closing quality of the hard pack small case lid of the present invention, the step S2 may specifically include:

[0053] Step S21: Place the standard hard pack small case sample containing cigarettes that has not been opened and closed in the detection area of the sample stage, and obtain the image of the standard hard pack small case sample through the photographing device to obtain the standard sample image.

[0054] Step S22: Place the hard pack small box containing cigarette sticks on the detection area of the sample stage, and obtain an image of the hard pack small box sample to be measured through the imaging device, thereby obtaining the sample image to be measured.

[0055] Among them, the imaging device can be, for example, a camera.

[0056] In some embodiments of the present invention, before step S2, the method for evaluating the closing quality of the hard pack small box lid further includes:

[0057] Turn on the light source device and adjust it to the preset illumination brightness, and adjust the position of the light source device so that the light source device irradiates on the detection table surface of the sample stage.

[0058] In some embodiments of the present invention, after step S2 and before step S3, the method for evaluating the closing quality of the hard pack small box lid further includes:

[0059] Preprocess the standard sample image and the sample image to be measured respectively.

[0060] Among them, the preprocessing specifically includes at least one of image grayscale processing, image filtering processing, and image enhancement processing. Through preprocessing, the image quality can be improved.

[0061] Step S3: According to the standard sample image and the sample image to be measured, detect the graphic information of the surface main body and the lid part on the standard hard pack small box sample and the hard pack small box sample to be measured respectively, and obtain the position information of the surface main body and the lid part corresponding to the standard hard pack small box sample and the hard pack small box sample to be measured respectively according to the graphic information.

[0062] In an embodiment of the method for evaluating the closing quality of the hard pack small box lid of the present invention, step S3 may specifically include:

[0063] Step S31: Based on the sample image to be measured, identify the graphic information of the surface main body and the lid part on the hard pack small box sample to be measured respectively, and obtain the position information corresponding to the surface main body and the lid part respectively according to the graphic information.

[0064] Step S32: Based on the standard sample image, identify the graphic information of the surface main body and the lid part on the standard hard pack small box sample respectively, and obtain the position information corresponding to the surface main body and the lid part respectively according to the graphic information.

[0065] Specifically, the ORB (Oriented FAST and Rotated BRIEF) feature extraction and matching algorithm is used to identify the graphic information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample respectively, and the corresponding position information is obtained based on the pixel information corresponding to the graphic information of the surface main body and the box cover part identified. The graphic information of the surface main body and the box cover part corresponding to the standard hard pack small box sample is respectively as Figure 2 shown in recognition region 1 and recognition region 2. The graphic information of the surface main body and the box cover part corresponding to the to-be-tested hard pack small box sample is respectively as Figure 3 shown in recognition region 1 and recognition region 2.

[0066] Step S4: Based on the position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample, obtain the evaluation result of the box cover closing quality of the to-be-tested hard pack small box sample.

[0067] Specifically, compare the position differences of the surface main body and the box cover part corresponding to the to-be-tested hard pack small box sample and the standard hard pack small box sample to determine whether the to-be-tested hard pack small box sample meets the preset position deviation standard. If it meets, the evaluation result of the box cover closing quality of the to-be-tested hard pack small box sample is qualified. In the specific implementation of the present invention, the position deviation of the surface main body and the box cover part corresponding to the to-be-tested hard pack small box sample and the standard hard pack small box sample can be compared one by one. If the slit deviation between the two is greater than or equal to the deviation standard corresponding to the preset position, it is determined that the evaluation result of the box cover closing quality of the current to-be-tested hard pack small box sample is unqualified, that is, the "open mouth smile" defect appears.

[0068] The method for evaluating the box cover closing quality of the hard pack small box provided by the embodiment of the present invention accurately quantifies and evaluates the box cover slit through image processing technology, and quickly obtains the detection result by comparing with the standard parameters during the detection process. Compared with the method that the manual slit determination mainly relies on visual inspection and ruler measurement, the accuracy is higher, and problems such as inconsistent discrimination scales, empirical and individualized inspection methods are avoided.

[0069] Correspondingly, as Figure 4 shown, the present invention also provides a system for evaluating the box cover closing quality of the hard pack small box, including:

[0070] A box cover opening and closing device 1, configured to obtain a to-be-tested hard pack small box sample after opening and closing the cigarette box cover of the to-be-tested hard pack small box containing cigarettes a preset number of times;

[0071] A sample image acquisition module 2, configured to respectively acquire a standard sample image corresponding to a standard hard pack small box sample containing cigarettes that has not been opened and closed and a to-be-tested sample image corresponding to the to-be-tested hard pack small box sample containing cigarettes;

[0072] A position information acquisition module 3, configured to respectively detect graphic and text information on the surface main body and the box cover part of the standard hard pack small box sample and the to-be-detected hard pack small box sample according to the standard sample image and the to-be-detected sample image, and respectively obtain the position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-detected hard pack small box sample according to the graphic and text information;

[0073] A box cover closing quality evaluation module 4, configured to obtain a box cover closing quality evaluation result of the to-be-detected hard pack small box sample based on the position information of the surface main body and the box cover part corresponding to the standard hard pack small box sample and the to-be-detected hard pack small box sample.

[0074] The system for evaluating the closing quality of the hard pack small box cover provided by the embodiment of the present invention accurately quantifies and evaluates the box cover slit through image processing technology, and quickly obtains the detection result by comparing with the standard parameters during the detection process. Compared with the method that the manual slit determination mainly relies on visual inspection and ruler measurement, the accuracy is higher, and problems such as inconsistent discrimination scales, empirical and individualized inspection methods are avoided.

[0075] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0076] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A method for evaluating the closing quality of the lid of a rigid carton, characterized in that, Including: After opening and closing the cigarette case lid of the hard pack small box to be tested containing cigarette sticks for a preset number of times, a hard pack small box sample to be tested is obtained; Respectively obtain a standard sample image corresponding to a standard hard pack small box sample containing cigarette sticks that has not been opened and closed and a to-be-tested sample image corresponding to the hard pack small box sample to be tested containing cigarette sticks; According to the standard sample image and the to-be-tested sample image, respectively detect the graphic and text information on the surface main body and the cigarette case lid part of the standard hard pack small box sample and the to-be-tested hard pack small box sample, and respectively obtain the position information of the surface main body and the cigarette case lid part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample according to the graphic and text information; Based on the position information of the surface main body and the cigarette case lid part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample, obtain the evaluation result of the cigarette case lid closing quality of the to-be-tested hard pack small box sample, The step of obtaining the hard pack small box sample to be tested after opening and closing the cigarette case lid of the hard pack small box to be tested containing cigarette sticks for a preset number of times specifically includes: Manually tear off the pull wire and the BOPP film at the cigarette case lid of the cigarette case sample containing cigarette sticks, open the cigarette case lid, tear off the inner lining paper piece and then close the cigarette case lid, and place the sample in the cigarette case positioning groove; Start the power supply and compressed air, and control the pneumatic pressure rod through the controller to drive the cigarette case lid opening and closing device to change positions, open the cigarette case lid, and obtain the hard pack small box sample to be tested after opening and closing 15 to 25 times.

2. The method for evaluating the closing quality of the lid of a rigid carton according to claim 1, characterized in that, The step of respectively obtaining a standard sample image corresponding to a standard hard pack small box sample containing cigarette sticks that has not been opened and closed and a to-be-tested sample image corresponding to the hard pack small box sample to be tested containing cigarette sticks specifically includes: Place the standard hard pack small box sample containing cigarette sticks that has not been opened and closed in the detection area of the sample stage, and obtain an image of the standard hard pack small box sample through the photographing device to obtain the standard sample image; Place the hard pack small box to be tested containing cigarette sticks in the detection area of the sample stage, and obtain an image of the hard pack small box sample to be tested through the photographing device to obtain the to-be-tested sample image.

3. The method for evaluating the closing quality of the lid of a rigid carton according to claim 2, characterized in that, Before obtaining the standard sample image and the to-be-tested sample image, the method for evaluating the closing quality of the hard pack small box cigarette case lid further includes: Turn on the light source device and adjust it to the preset illumination brightness, and adjust the position of the light source device so that the light source device irradiates on the detection table surface of the sample stage.

4. The method for evaluating the closing quality of the lid of a rigid carton according to claim 1, characterized in that, After obtaining the standard sample image and the to-be-tested sample image, the method for evaluating the closing quality of the hard pack small box cigarette case lid further includes: Perform preprocessing on the standard sample image and the to-be-tested sample image respectively, and the preprocessing specifically includes at least one of image grayscale processing, image filtering processing, and image enhancement processing.

5. The method for evaluating the closing quality of the lid of a rigid carton according to claim 1, wherein The step of respectively detecting the graphic and text information on the surface main body and the cigarette case lid part of the standard hard pack small box sample and the to-be-tested hard pack small box sample according to the standard sample image and the to-be-tested sample image, and respectively obtaining the position information of the surface main body and the cigarette case lid part corresponding to the standard hard pack small box sample and the to-be-tested hard pack small box sample according to the graphic and text information specifically includes: Based on the image of the sample to be measured, respectively identify the graphic and text information on the surface main body and the box cover part of the hard package small box sample to be measured, and respectively obtain the corresponding position information of the surface main body and the box cover part according to the graphic and text information; Based on the image of the standard sample, respectively identify the graphic and text information on the surface main body and the box cover part of the standard hard package small box sample, and respectively obtain the corresponding position information of the surface main body and the box cover part according to the graphic and text information; 6. The method for evaluating the closing quality of the lid of a rigid box according to claim 5, characterized in that, Use the ORB feature extraction and matching algorithm to respectively identify the graphic and text information on the surface main body and the box cover part corresponding to the standard hard package small box sample and the hard package small box sample to be measured, and obtain the corresponding position information based on the pixel information corresponding to the identified graphic and text information on the surface main body and the box cover part; 7. The method for evaluating the closing quality of the lid of a rigid carton according to claim 1, characterized in that, Based on the position information of the surface main body and the box cover part corresponding to the standard hard package small box sample and the hard package small box sample to be measured, obtain the evaluation result of the box cover closing quality of the hard package small box sample to be measured, specifically including: Compare the position differences of the surface main body and the box cover part corresponding to the hard package small box sample to be measured and the standard hard package small box sample to determine whether the hard package small box sample to be measured meets the preset position deviation standard. If it meets, the evaluation result of the box cover closing quality of the hard package small box sample to be measured is qualified; 8. The method for evaluating the closing quality of the lid of a rigid carton according to claim 7, characterized in that The comparison of the position differences of the surface main body and the box cover part corresponding to the hard package small box sample to be measured and the standard hard package small box sample to determine whether the hard package small box sample to be measured meets the preset position deviation standard specifically includes: Compare the position deviations of the surface main body and the box cover part corresponding to the hard package small box sample to be measured and the standard hard package small box sample one by one. If the slit deviation between the two is greater than or equal to the deviation standard corresponding to the preset position, it is determined that the evaluation result of the box cover closing quality of the current hard package small box sample to be measured is unqualified; 9. A system for evaluating the closing quality of the lid of a rigid carton using the method according to any one of claims 1-8, characterized in that, Include: A box cover opening and closing device for obtaining a hard package small box sample to be measured after opening and closing the cigarette box cover of the hard package small box to be measured containing cigarette sticks a preset number of times; A sample image acquisition module for respectively acquiring a standard sample image corresponding to a standard hard package small box sample containing cigarette sticks that has not been opened and closed and a to-be-measured sample image corresponding to a hard package small box sample to be measured containing cigarette sticks; A position information acquisition module for respectively detecting the graphic and text information on the surface main body and the box cover part of the standard hard package small box sample and the hard package small box sample to be measured according to the standard sample image and the to-be-measured sample image, and respectively obtaining the position information of the surface main body and the box cover part corresponding to the standard hard package small box sample and the hard package small box sample to be measured according to the graphic and text information; A box cover closing quality evaluation module for obtaining the evaluation result of the box cover closing quality of the hard package small box sample to be measured based on the position information of the surface main body and the box cover part corresponding to the standard hard package small box sample and the hard package small box sample to be measured.

Images