Error detection system and method for book and periodical printing

Abstract

The invention relates to the field of printing error detection, in particular to an error detection system and method for book and periodical printing, and the system comprises an error printing collection unit, a periodical page analysis unit, an error printing prediction unit and an error printing reminding unit. According to the method, the page numbers of the periodical pages are counted in the periodical page printing process, the number of all the printed page numbers is generated according to the statistical result, whether the printed periodical pages can form the complete set or not is determined, and therefore the repeated page and missing page errors in the binding link after printing are predicted, and in the page number counting process of the periodical pages, the page number of the periodical pages can be calculated. Statistics is carried out on printing errors occurring in different page numbers, the number of errors occurring in the different page numbers during book and periodical printing is determined according to the statistical result, the error rate of the different page numbers is determined, and the application functionality of the book and periodical printing error detection system is improved.

Description

Technical Field

[0001] This invention relates to the field of printing error detection, specifically to an error detection system and method for book and periodical printing. Background Technology

[0002] Printing is a technology that involves transferring ink from original manuscripts such as text, pictures, photographs, and anti-counterfeiting materials to the surface of materials like paper, textiles, plastics, leather, PVC, and PC through processes such as plate making, inking, and pressing. This allows for the mass reproduction of the original content. During the printing process, printing equipment has a certain probability of failure, especially during continuous long-term printing operations or when weather and environmental factors cause significant interference. This can easily lead to problems such as missing prints, paper jams, or other issues, directly affecting the quality of the documents. However, current text quality checks often rely on manual inspection, page by page. This method is difficult to detect printing quality problems and results in waste.

[0003] Currently, existing book and periodical printing error detection systems still have shortcomings. Existing patent document CN116306576A discloses a book and periodical printing error detection system, which improves the error detection coverage by detecting image and format problems. At the same time, it further analyzes the error detection results to guess the machine's faults, thus improving the functionality of the error detection system. However, in addition to single-page errors such as typos and missing characters, book and periodical errors also include problems such as duplicate pages and missing pages. Due to technical limitations, it is difficult to detect page turning after the books and periodicals are bound, which makes it difficult to detect page turning after the books and periodicals are bound, so the functionality of the book and periodical printing error detection system is still insufficient.

[0004] To address the aforementioned technical problems, this application proposes a solution. Summary of the Invention

[0005] This invention addresses the problem that it is difficult to detect missing or duplicate pages after binding in book and periodical printing, thus reducing the functionality of the book and periodical error detection system. Therefore, it proposes an error detection system and method for book and periodical printing.

[0006] The objective of this invention can be achieved through the following technical solutions: An error detection system for book and periodical printing includes an error collection unit, which is used to collect printed images and compare the collected printed images with images in a database to determine the printed page number and printing qualification. The page analysis unit analyzes the printed page number and printing qualification to obtain the printing qualification rate of different page numbers and classifies them into high qualification rate page numbers and low qualification rate page numbers. At the same time, the page analysis unit analyzes the number of times the page number appears and the total number of page numbers to generate a page number correct signal or a page number error signal. The misprint prediction unit predicts the probability of missing or duplicate pages in the printed pages based on the page number error signal. The misprint reminder unit outputs and displays printing errors, pages with high pass rates, and pages with low pass rates.

[0007] In a preferred embodiment of the present invention, the misprint collection unit extracts the text and image portions of the collected image using a preset algorithm to obtain text and image information. The misprint collection unit obtains printed page data through a preset database. The printed page data is divided into i pages, and each page is a printed page. The misprint collection unit compares the text information and image information with the printed pages in the database one by one. If a pixel in the text information or image information has the same color as a pixel in the same position in the i-th group of printed pages, the pixel is recorded as overlapping. If a pixel in the text information or image information has a different color from a pixel in the same position in the i-th group of printed pages, the pixel is recorded as not overlapping. The misprint acquisition unit records overlapping pixels as correct pixels and non-overlapping pixels as abnormal pixels. The misprint acquisition unit calculates the proportion of correct pixels among all pixels and records it as the correct proportion. The misprint acquisition unit selects the printing page i with the highest correct proportion and marks the acquired image as the same printing page i.

[0008] In a preferred embodiment of the present invention, the misprint acquisition unit performs threshold analysis on the correct percentage. If the correct percentage is greater than or equal to a preset percentage threshold, a printing qualified signal is generated; if the correct percentage is less than the preset percentage threshold, a printing error signal is generated.

[0009] In a preferred embodiment of the present invention, the page analysis unit obtains the printed page number i through the misprint collection unit, and performs statistics on the printed page number i after printing is completed to obtain the total number of prints m. The page analysis unit obtains the total number of pages n through the database, and the page analysis unit divides the total number of prints m by the total number of pages n to obtain the number of sets printed X. The page analysis unit compares the number of times each page number in printed page number i appears with the number of printed sets X. If the number of times each page number in printed page number i appears is equal to the number of printed sets X, a page number pass signal is generated. If the number of times each page number in printed page number i appears is not equal to the number of printed sets X, a page number error signal is generated. The page analysis unit sends a page number pass signal or a page number error signal to the misprint prediction unit. After receiving the page number error signal, the misprint prediction unit generates a duplicate page warning and displays the duplicate page warning through a display device.

[0010] In a preferred embodiment of the present invention, the page analysis unit acquires the printed page number i, the printing qualified signal, and the printing error signal through the misprint acquisition unit. When the printed page number i generates a printing qualified signal, it is recorded as the correct page number i. When the printed page number i generates a printing error signal, it is recorded as the error page number i. The page analysis unit creates two sets: a correct set and an incorrect set. The page analysis unit categorizes correct page numbers into the correct set and incorrect page numbers into the incorrect set. The page analysis unit selects printed page number i, counts the number of times printed page number i appears in the correct set and the incorrect set respectively, and calculates the ratio of the number of times printed page number i appears in the incorrect set to the total number of times printed page number i appears in the two sets to obtain the misprint ratio.

[0011] In a preferred embodiment of the present invention, the page analysis unit selects each printed page i one by one to obtain all misprint ratios Ci. The page analysis unit performs an arithmetic mean on the misprint ratios Ci to obtain the mean misprint ratio C0. The page analysis unit compares the misprint ratio Ci with the mean misprint ratio C0. If the misprint ratio Ci is less than the mean misprint ratio C0, it is recorded as a low error rate page. If the misprint ratio Ci is greater than the mean misprint ratio C0, it is recorded as a high error rate page.

[0012] In a preferred embodiment of the present invention, the misprinting reminder unit acquires the printing error signal and the printing page number i through the printing error acquisition unit, stores the printing page number i and the printing error signal, and displays them through a display device; The misprinting alert unit obtains the high error rate page numbers and low error rate page numbers through the printing analysis unit, and displays the high error rate page numbers and low error rate page numbers through the display device.

[0013] An error detection method for book and periodical printing, the method comprising the following steps: Step 1: Extract text and image information from the page to determine the page number; Step 2: Compare the text and image information in the image to generate a printing pass signal or a printing error signal; Step 3: Perform aggregated classification and statistical analysis on the page numbers of the publication, classifying different page numbers into high error rate page numbers and low error rate page numbers; Step 4: Statistically analyze the number of print runs and the frequency of each page number to predict missing or duplicate pages after binding.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, error detection is performed during the printing process. Images collected during error detection are compared and analyzed to determine the page number of the printed page. The page numbers are then counted, and the total number of printed pages is generated based on the statistical results. The number of each page number is compared with the total number of printed pages to determine whether the printed pages can form a complete set. This enables the prediction of duplicate and missing page errors in the binding process after printing, assists in the error detection of duplicate and missing pages in bound books and periodicals, and improves the functionality of the printing error detection system. 2. In this invention, during the process of counting pages in a book or periodical, the printing errors that occur on different page numbers are statistically analyzed. Based on the statistical results, the number of errors that occur on different page numbers during the printing of the book or periodical is determined, thereby obtaining different error rates for different page numbers. Based on the different error rates, data support is provided for improving printing quality, thereby increasing the application functionality of the book or periodical printing error detection system. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a system block diagram of the present invention; Figure 2 This is a system flowchart of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0018] Please see Figure 1 - Figure 2 As shown, an error detection system for book and periodical printing includes an error collection unit, a page analysis unit, an error prediction unit, and an error reminder unit. The error collection unit captures images of the printed pages using an image acquisition device and extracts text and image portions from the captured images using a preset algorithm to obtain text and image information. The error collection unit obtains printed page data from a preset database. The printed page data is divided into i pages, each page being a printed page.

[0019] The misprint detection unit compares the text and image information with the printed pages in the database one by one. If a pixel in the text or image information has the same color as a pixel at the same position in the i-th group of printed pages, the pixel is recorded as overlapping. If a pixel in the text or image information has a different color from a pixel at the same position in the i-th group of printed pages, the pixel is recorded as not overlapping. When comparing the colors of printed pixels, the RGB color and brightness of the pixel are extracted as the comparison criteria. At the same time, a certain error range is set so that pixels within the error range are also considered the same. This avoids errors caused by changes in ambient light during image acquisition. During image acquisition, a fixed supplementary light source is set in the axial direction of the image acquisition device to improve the uniformity of the light received on the image during image acquisition and reduce the influence of ambient light.

[0020] Overlapping pixels are recorded as correct pixels, and non-overlapping pixels are recorded as abnormal pixels. The misprint acquisition unit calculates the proportion of correct pixels among all pixels and records it as the correct proportion. The misprint acquisition unit selects the printing page i with the highest correct proportion and marks the acquired image as the same printing page i.

[0021] The misprint acquisition unit performs threshold analysis on the percentage of correct prints. If the percentage of correct prints is greater than or equal to the preset percentage threshold, a printing pass signal is generated. If the percentage of correct prints is less than the preset percentage threshold, a printing error signal is generated.

[0022] The printing error acquisition unit sends the printing error signal and the printing page number i to the printing error reminder unit. The printing error reminder unit stores the printing page number i and the printing error signal and displays them through a display device. Example 2

[0023] Please see Figure 1 - Figure 2 As shown, the page analysis unit acquires the printed page number i, the printing pass signal, and the printing error signal through the misprint acquisition unit. When the printed page number i generates a printing pass signal, it is recorded as the correct page number i. When the printed page number i generates a printing error signal, it is recorded as the error page number i.

[0024] The page analysis unit creates two sets: a correct set and an incorrect set. The correct page numbers are categorized into the correct set, and the incorrect page numbers are categorized into the incorrect set.

[0025] The page analysis unit selects printed page number i and counts the number of times printed page number i appears in the correct set and the incorrect set respectively. The page analysis unit calculates the ratio of the number of times printed page number i appears in the incorrect set to the total number of times printed page number i appears in the two sets, and obtains the misprint ratio.

[0026] The page analysis unit selects each printed page i one by one to obtain the total misprint ratio Ci. The page analysis unit then calculates the arithmetic mean of the misprint ratios Ci to obtain the mean misprint ratio C0. The page analysis unit compares the misprint ratio Ci with the mean misprint ratio C0. If the misprint ratio Ci is less than the mean misprint ratio C0, it is recorded as a low error rate page; if the misprint ratio Ci is greater than the mean misprint ratio C0, it is recorded as a high error rate page. The printing analysis unit sends the high error rate page and the low error rate page to the misprint alert unit. The misprint alert unit displays the page. The system displays pages with high and low error rates. Managers use these pages, based on printing statistics, to determine the printing difficulty and error rate of different pages. When multiple printing machines are available, the system can flexibly allocate printing tasks for pages with high error rates to machines with better operating conditions and lower error rates, thereby reducing the overall error rate. Conversely, pages with low error rates can be allocated to machines with less optimal operating conditions, ensuring printing accuracy on these machines by reducing printing difficulty, thus improving print quality. Example 3

[0027] Please see Figure 1 - Figure 2 As shown, the page analysis unit obtains the printed page number i through the misprint collection unit, and performs statistics on the printed page number i after printing is completed to obtain the total number of prints m. The page analysis unit obtains the total number of pages n through the database, and the page analysis unit divides the total number of prints m by the total number of pages n to obtain the number of sets printed X.

[0028] The page analysis unit compares the number of times each page number in printed page number i appears with the number of sets printed X. If the number of times each page number in printed page number i appears equals the number of sets printed X, a page number pass signal is generated. If the number of times each page number in printed page number i appears does not equal the number of sets printed X, a page number error signal is generated.

[0029] The page analysis unit sends a page number pass signal or a page number error signal to the misprint prediction unit. After receiving the page number error signal, the misprint prediction unit generates a duplicate page warning and displays the duplicate page warning through the display device.

[0030] When issuing warnings for duplicate or missing pages, the misprint prediction unit compares the frequency of occurrence of all page numbers. Multiple sets of page numbers with the same frequency are recorded as the same set of page numbers. The misprint prediction unit displays page numbers that are not in the same set to remind administrators of the page numbers that caused the error signal. This allows administrators to manually supplement or adjust the page numbers that caused the error signal. When multiple sets of the same set of page numbers exist, only the set of page numbers with the highest frequency is retained. Example 4

[0031] Please see Figure 1 - Figure 2 As shown, an error detection method for book and periodical printing includes the following steps: Step 1: During the book printing process, the pages are captured using image acquisition equipment. Text and image information are extracted from the captured images and compared with the database to determine the page number to which the captured page belongs.

[0032] Step 2: Compare and judge the extracted text and image information. Generate a printing pass signal for page numbers that pass the comparison, and generate a printing error signal for page numbers that fail the comparison.

[0033] Step 3: Collectively classify and statistically analyze the pages based on their page numbers to determine the error rate of each page number. Then, classify the different page numbers into high error rate pages and low error rate pages based on their error rates.

[0034] Step 4: After printing is completed, the number of pages printed and the frequency of each page number are counted. Based on the statistical results, the completeness of the printed pages is judged, and any missing or duplicate pages after binding are predicted.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An error detection system for book and periodical printing, characterized in that: It includes a misprint collection unit, which is used to collect printing pictures, compare the collected printing pictures with the pictures in the database, and determine the printing page number and printing eligibility; A page analysis unit, wherein the page analysis unit performs analysis based on the printed page number and the printing qualification, obtains the printing qualification rate of different page numbers, and classifies them into high qualification rate page numbers and low qualification rate page numbers. At the same time, the page analysis unit analyzes the number of page number occurrences and the total number of page numbers, and generates a page number correct signal or a page number error signal; A misprint prediction unit, which predicts the possibility of missing or duplicated pages in printed pages according to the page error signal; A misprinting reminder unit is used to output and display printing errors, high-qualified pages, and low-qualified pages.

2. The error detection system for book and periodical printing according to claim 1, characterized in that: The misprint collection unit extracts the text part and the image part of the collected picture through a preset algorithm to obtain text information and image information. The misprint collection unit obtains the printed page data through a preset database. The printed page data is divided into i pages, and each page is a printed page. The misprint collection unit compares the text information and the image information with the printed pages in the database one by one. If a pixel point in the text information or the image information has the same color as a pixel point at the same position in the i-th group of printed pages, the pixel point is recorded as overlapping. If a pixel point in the text information or the image information has a different color from a pixel point at the same position in the i-th group of printed pages, the pixel point is recorded as not overlapping. The misprint collection unit records the overlapping pixels as correct pixels and the non-overlapping pixels as abnormal pixels. The misprint collection unit calculates the proportion of correct pixels in all pixels and records it as the correct proportion. The misprint collection unit selects the printed page i with the highest correct proportion and marks the collected image as the same printed page number i.

3. The error detection system for book and periodical printing according to claim 2, characterized in that: The misprint collection unit performs a threshold analysis on the correct proportion. If the correct proportion is greater than or equal to a preset proportion threshold, a printing qualified signal is generated. If the correct proportion is less than the preset proportion threshold, a printing error signal is generated.

4. The error detection system for book and periodical printing according to claim 3, characterized in that: The page analysis unit obtains the printing page number i through the misprint collection unit, and counts the printing page number i after printing is completed to obtain the total printing quantity m. The page analysis unit obtains the total page number n through the database, and the page analysis unit obtains the printing set number X by dividing the total printing quantity m by the total page number n. The page analysis unit compares the number of occurrences of each page number in the printed page number i with the number of printed sets X. If the number of occurrences of each page number in the printed page number i is equal to the number of printed sets X, a page number qualified signal is generated; if the number of occurrences of each page number in the printed page number i is not equal to the number of printed sets X, a page number error signal is generated; The page analysis unit sends a page number qualified signal or a page number error signal to the misprint prediction unit. After receiving the page number error signal, the misprint prediction unit generates a duplicate page missing warning and displays the duplicate page missing warning through a display device.

5. The error detection system for book and periodical printing according to claim 4, characterized in that: The page analysis unit obtains the printing page number i, the printing qualified signal and the printing error signal through the misprinting acquisition unit, and records the printing page number i as the correct page number i when the printing page number i generates the printing qualified signal, and records the printing page number i as the error page number i when the printing page number i generates the printing error signal; The publication page analysis unit creates two sets of sets, namely a correct set and an error set. The publication page analysis unit classifies the correct page numbers into the correct set and classifies the error page numbers into the error set. The page analysis unit selects a printed page number i, and counts the number of times the printed page number i appears in the correct set and the error set respectively. The page analysis unit calculates the ratio of the number of times the printed page number i appears in the error set to the total number of times the printed page number i appears in the two sets to obtain the misprint ratio.

6. The error detection system for book and periodical printing according to claim 5, characterized in that: The page analysis unit selects all printed page numbers i one by one to obtain all misprinting ratios Ci. The page analysis unit performs arithmetic averaging on the misprinting ratios Ci to obtain a mean misprinting ratio C0. The page analysis unit compares the misprinting ratio Ci with the mean misprinting ratio C0. If the misprinting ratio Ci is less than the mean misprinting ratio C0, it is recorded as a low error rate page number. If the misprinting ratio Ci is greater than the mean misprinting ratio C0, it is recorded as a high error rate page number.

7. The error detection system for book and periodical printing according to claim 6, characterized in that: The misprinting reminder unit obtains the printing error signal and the printing page number i through the printing error collection unit, and the misprinting reminder unit stores the printing page number i and the printing error signal and displays them through the display device; The misprinting reminder unit obtains the high error rate page number and the low error rate page number through the printing analysis unit, and the misprinting reminder unit displays the high error rate page number and the low error rate page number through a display device.

8. An error detection method for book and periodical printing, applicable to the error detection system for book and periodical printing as claimed in claim 7, characterized in that: The method comprises the following steps: Step 1: extract text information and image information from the publication page image and determine the publication page number; Step 2: Compare the text information and image information in the screen to generate a printing pass signal or a printing error signal; Step 3: Collectively classify and count the publication page numbers, and classify different publication page numbers into high error rate pages and low error rate pages; Step 4: Count the number of prints and the number of occurrences of each page number to predict missing or duplicated pages after binding.

Images