CN112415022A - Method for rapidly detecting printing and binding quality of printed matter - Google Patents
Method for rapidly detecting printing and binding quality of printed matter Download PDFInfo
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- CN112415022A CN112415022A CN202011087279.3A CN202011087279A CN112415022A CN 112415022 A CN112415022 A CN 112415022A CN 202011087279 A CN202011087279 A CN 202011087279A CN 112415022 A CN112415022 A CN 112415022A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95607—Inspecting patterns on the surface of objects using a comparative method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
Abstract
The invention discloses a method for rapidly detecting the printing and binding quality of a printed matter, which is a printed matter detection method, and comprises the following steps: the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table; step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter; according to the method for rapidly detecting the printing and binding quality of the printed matter, through the combined application of the system of the accessories, the printing content in the printed matter and the printing content deviation condition caused by looseness in binding can be uniformly processed, the efficiency of the printed matter in the printing and binding quality detection process is improved, in addition, after the detection problem is found, the on-site alarm and the remote prompt can be rapidly carried out, and the matching performance in the detection process is strong.
Description
Technical Field
The invention discloses a method for rapidly detecting printing and binding quality of a printed matter, in particular to a printed matter detection method.
Background
Printed matters, printed books and newspapers, pictures and the like are various printed products and are general terms of various finished products produced by using a printing technology. In daily life, people contact with newspapers, books and magazines, maps, posters, advertisements, envelopes, letter papers, file bags, trademarks, labels, business cards, invitation cards, bank notes, greeting cards, calendars, wall calendars, picture albums, various certificate cards, packing boxes, gift boxes, circuit boards and the like.
In the process of printing and manufacturing the pictures and texts, the printing effect and the cost of the printed product are also influenced by the printing method and the adopted printing medium, so the basic understanding of the printing medium is needed, and the printing and binding quality detection is needed after the printing of the printed product is carried out.
Binding is to process into the volume with printed page, signature, or to supporting in arrangement such as document, bill, orders into the post-press processing such as volume, and the binding of books and periodicals, including ordering and two big processes of dress, can lead to the condition that the dislocation appears in the printed matter content when binding the mistake, and the printing content detects mainly to include: white page, wrong page, ghost, etc.
At present in the detection of carrying out the printed matter printing and binding quality to separately go on as the owner, observe the printing content of printed matter earlier, and alone check the printing content skew condition because of producing not hard up and leading to in binding, it is comparatively loaded down with trivial details, unable quick the processing of unifying that carries on, reduced the efficiency among the testing process, also be convenient for carry on-the-spot alarm and long-range suggestion after the discovery problem in the detection, reduced the cooperation nature of testing process.
Disclosure of Invention
The invention aims to provide a method for rapidly detecting the printing and binding quality of a printed matter, which aims to solve the problems that the existing method for detecting the printing and binding quality of the printed matter in the background art is mainly separated, the printed content of the printed matter is observed firstly, the printed content deviation condition caused by looseness generated in binding is independently detected, the method is complicated, the rapid unified treatment cannot be performed, the efficiency in the detection process is reduced, the field alarm and remote prompt are not convenient to perform after the problem is found in the detection, and the matching performance in the detection process is reduced.
In order to achieve the purpose, the invention provides the following technical scheme: a method for rapidly detecting the printing and binding quality of printed matters comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the light source divergence is carried out from four directions of 0-20 degrees, 90-110 degrees, 180-200 degrees and 270-290 degrees by utilizing the daylighting structure respectively, the surface of an object to be detected is uniformly irradiated, and the surface image to be detected under the incident illumination condition with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of a camera;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
Preferably, the detection table is made of a hard rubber plate, and the bottom of the detection table is connected with a lifting support through a screw rod.
Preferably, the image acquisition device uses a triple prism camera, and also uses a multi-channel area-array camera, such as an RGB-NIR four-channel camera, to obtain the surface image to be detected under the condition that a single exposure is completed with four incident wavelengths by combining the corresponding incident wavelengths of different channels.
Preferably, the height h, the spin angle θ and the center distance d of the incident light source are adjusted according to the height of the detection table.
Preferably, the lighting structure is an LED lamp.
Preferably, the alarm device is a field whistle and a remote wireless transmission structure.
Compared with the prior art, the invention has the beneficial effects that: according to the method for rapidly detecting the printing and binding quality of the printed matter, through the combined application of the system of the accessories, the printing content in the printed matter and the printing content deviation condition caused by looseness in binding can be uniformly processed, the efficiency of the printed matter in the printing and binding quality detection process is improved, in addition, after the detection problem is found, the on-site alarm and the remote prompt can be rapidly carried out, and the matching performance in the detection process is strong.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.
The invention provides a technical scheme that: a method for rapidly detecting the printing and binding quality of printed matters comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the light source divergence is carried out from four directions of 0 degree, 90 degrees, 180 degrees and 270 degrees by utilizing the lighting structure respectively, the surface of the object to be detected is uniformly irradiated, and the surface image to be detected under the incident illumination condition with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of the camera;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
The detection platform is made of a hard rubber plate, the bottom of the detection platform is connected with a lifting support through a screw rod, a prism camera is adopted by an image acquisition device, a multi-channel area-array camera such as an RGB-NIR four-channel camera is also utilized, a single exposure is obtained by combining corresponding incident wavelengths of different channels, surface images to be detected under the condition of completing four incident wavelengths, the height h, the spinning angle theta and the center distance d of an incident light source need to be adjusted in a matched mode according to the height of the detection platform, a lighting structure is an LED lamp, and an alarm device is a field whistle device and a remote wireless transmission structure.
Example 1
A method for rapidly detecting the printing and binding quality of printed matters comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the light source divergence is carried out from four directions of 0 degree, 90 degrees, 180 degrees and 270 degrees by utilizing the lighting structure respectively, the surface of the object to be detected is uniformly irradiated, and the surface image to be detected under the incident illumination condition with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of the camera;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
The detection platform is made of a hard rubber plate, the bottom of the detection platform is connected with a lifting support through a screw rod, a prism camera is adopted by an image acquisition device, a multi-channel area-array camera such as an RGB-NIR four-channel camera is also utilized, a single exposure is obtained by combining corresponding incident wavelengths of different channels, surface images to be detected under the condition of completing four incident wavelengths, the height h, the spinning angle theta and the center distance d of an incident light source need to be adjusted in a matched mode according to the height of the detection platform, a lighting structure is an LED lamp, and an alarm device is a field whistle device and a remote wireless transmission structure.
Example 2
A method for rapidly detecting the printing and binding quality of printed matters comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the light source divergence is carried out from four directions of 20 degrees, 110 degrees, 200 degrees and 290 degrees by utilizing the lighting structure respectively, the surface of the object to be detected is uniformly irradiated, and the surface image to be detected under the incident illumination condition with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of the camera;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
The detection platform is made of a hard rubber plate, the bottom of the detection platform is connected with a lifting support through a screw rod, a prism camera is adopted by an image acquisition device, a multi-channel area-array camera such as an RGB-NIR four-channel camera is also utilized, a single exposure is obtained by combining corresponding incident wavelengths of different channels, surface images to be detected under the condition of completing four incident wavelengths, the height h, the spinning angle theta and the center distance d of an incident light source need to be adjusted in a matched mode according to the height of the detection platform, a lighting structure is an LED lamp, and an alarm device is a field whistle device and a remote wireless transmission structure.
Example 3
A method for rapidly detecting the printing and binding quality of printed matters comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the method comprises the steps that light sources are diverged from four directions of 5 degrees, 45 degrees, 180 degrees and 270 degrees respectively by utilizing lighting structures, the surface of an object to be detected is uniformly irradiated, the surface image to be detected under incident illumination conditions with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of a camera, the B, G, R channels of color camera acquisition equipment in an imaging unit are respectively corresponding to the three groups of lighting structures, and the color camera adopts a prism to separate different light waves, so that a rear-end sensor can acquire the incident light with different wavelengths in space, and under the illumination conditions with different wavelengths, compared with the traditional acquisition equipment, the interference of the illumination images with different wavelengths cannot be generated, and further the purpose that three non-crosstalk gray level images can be simultaneously acquired by the single exposure of the imaging unit is realized;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
The detection platform is made of a hard rubber plate, the bottom of the detection platform is connected with a lifting support through a screw rod, a prism camera is adopted by an image acquisition device, a multi-channel area-array camera such as an RGB-NIR four-channel camera is also utilized, a single exposure is obtained by combining corresponding incident wavelengths of different channels, surface images to be detected under the condition of completing four incident wavelengths, the height h, the spinning angle theta and the center distance d of an incident light source need to be adjusted in a matched mode according to the height of the detection platform, a lighting structure is an LED lamp, and an alarm device is a field whistle device and a remote wireless transmission structure.
By combining the above, the method for rapidly detecting the printing and binding quality of the printed matter can uniformly process the printing content in the printed matter and the printing content offset condition caused by looseness in binding through the combined application of the system of the accessories, improves the efficiency of the printed matter printing and binding quality detection process, can rapidly carry out on-site alarm and remote prompt after detecting problems, and has strong matching performance in the detection process.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A method for rapidly detecting the printing and binding quality of printed matters is characterized in that: the method comprises the following steps:
the method comprises the following steps: installing a detection table, placing a printed matter on the top of the detection table, fixing four corners of the printed matter, arranging lighting structures at the four corners of the detection table, and arranging an image acquisition device right above the detection table;
step two: the interior of the image acquisition device is electrically connected with the image processing system and the comparison system, a threshold value is preset in the comparison system, and the threshold value is the content and specification of the standardized printed matter;
step three: the light source divergence is carried out from four directions of 0-20 degrees, 90-110 degrees, 180-200 degrees and 270-290 degrees by utilizing the daylighting structure respectively, the surface of an object to be detected is uniformly irradiated, and the surface image to be detected under the incident illumination condition with different directions and different wavelengths can be simultaneously acquired by utilizing the first exposure of a camera;
step four: obtaining a shadow change image of the surface to be detected under the condition of the incident angle of the light source by utilizing gray scale change, further calculating the information of the surface change of the object by combining a surface reflection model according to the illumination intensity change distribution of the surface to be detected under the conditions of four groups of different incident directions;
step five: by arranging the image processing system in the image acquisition device and by means of the image processing technology of the image processing system, the interference of local calculation errors is avoided, so that the distinguishing characteristics of the background of the surface complex pattern and the contrast system can be enhanced;
step six: the outside electric connection display device of figure collection system and alarm device cooperate and carry out the cooperation warning when detecting the demonstration.
2. The method for rapidly detecting the printing and binding quality of the printed matters according to claim 1, wherein the method comprises the following steps: the material of examining the test table is the stereoplasm rubber slab, the bottom of examining the test table is connected with lifting support through the screw rod.
3. The method for rapidly detecting the printing and binding quality of the printed matters according to claim 2, wherein the method comprises the following steps: the image acquisition device adopts a prism camera, and also utilizes a multi-channel area-array camera, such as an RGB-NIR four-channel camera, to obtain a surface image to be detected under the condition that single exposure is completed by combining corresponding incident wavelengths of different channels.
4. The method for rapidly detecting the printing and binding quality of the printed matters according to claim 3, wherein the method comprises the following steps: the height h, the spin angle theta and the center distance d of the incident light source need to be adjusted in a matching mode according to the height of the detection table.
5. The method for rapidly detecting the printing and binding quality of the printed matters according to claim 4, wherein the method comprises the following steps: the lighting structure is an LED lamp.
6. The method for rapidly detecting the printing and binding quality of the printed matters according to claim 5, wherein the method comprises the following steps: the alarm device is a field whistle and a remote wireless transmission structure.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114701276A (en) * | 2022-03-31 | 2022-07-05 | 北京印刷学院 | Automatic binding system and method for thread bound book based on PLC control |
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