A template control method for simplifying certificate printing

Abstract

The present invention relates to the field of printing application technology, and discloses a template control method for simplifying certificate printing, the method comprising: step S1: acquiring a target certificate image; step S2: forming a certificate printing template, and at the same time classifying the attributes of the certificate to obtain attribute-specific printing parameters; step S3: acquiring a successfully matched certificate printing template and certificate printing parameters, and at the same time acquiring the certificate attribute category of the target certificate, and obtaining the attribute-specific printing parameters corresponding to the target certificate; step S4: recognizing and processing rare characters on the target certificate, and printing based on the attribute-specific printing parameters and the matched certificate printing template; by providing steps S2 and S3, the certificate printing template can be directly matched for subsequent printing by automatically analyzing the certificate image, and the printing parameters for common fields and key fields are distinguished, so as to facilitate more reasonable adjustment and fully guarantee the quality and validity of the printed certificate.

Description

Technical Field

[0001] The present invention relates to the field of printing application technology, and more particularly to a template control method for simplifying certificate printing. Background Art

[0002] With the rapid development of the economy and society, the types of various certificates in my country are becoming more and more diverse, and the issuance volume is also increasing. This has put forward higher requirements for the efficiency, accuracy and security of certificate printing. Each different certificate, such as passports, visas, endorsements, etc., requires the development of a corresponding printing program to complete the printing of the certificate. When the certificate is revised, the printing program needs to be redeveloped to adapt to the printing layout of the new version of the certificate, which is relatively cumbersome and has poor versatility.

[0003] A public document with publication number CN111190557A discloses a certificate printing method and system for configurable printing items, the method comprising: obtaining requirements for certificate printing of multiple users, generating multiple printing rules according to the requirements for certificate printing of multiple users; generating multiple printing templates according to the multiple printing rules, and encrypting the multiple printing templates; parsing the multiple printing templates, obtaining multiple printing templates and printing rules corresponding to the multiple printing templates, and storing the multiple printing templates and printing rules corresponding to the multiple printing templates; determining whether there is any printing template corresponding to the printing rule that meets the user's certificate printing request among the multiple printing templates and the printing rules corresponding to the multiple printing templates; generating printing items and anti-counterfeiting information according to user identity information, printing templates and printing rules, and printing certificates according to the generated printing items and anti-counterfeiting information; improving printing efficiency and reducing error rate.

[0004] However, in the above-mentioned public documents, it is impossible to dynamically match the printing templates for different certificate printing requirements, and it is impossible to dynamically adjust the printing parameters of different printed certificates according to actual printing requirements; in view of this, the present invention proposes a template control method for simplifying certificate printing, which matches the correct certificate printing template for the certificate to be printed, and dynamically adjusts the printing parameters of different printed certificates according to actual printing requirements. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a template control method for simplifying document printing to solve the problems existing in the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a template control method for simplifying document printing, comprising the following steps:

[0007] Step S1: Acquire a target document image and perform preprocessing operations on the target document image;

[0008] Step S2: Enter corresponding ID printing parameters for different ID cards to form an ID printing template, and update the corresponding ID printing parameters in real time when the ID card is revised; at the same time, classify the ID card attributes, obtain attribute-specific printing parameters, and set priorities for the attribute-specific printing parameters;

[0009] Step S3: Obtain the document name based on the target document image, obtain the matching document printing template and document printing parameters, and simultaneously obtain the document attribute category of the target document to obtain the attribute-specific printing parameters corresponding to the target document; obtain the common fields and key fields in the target document and dynamically adjust the printing parameters;

[0010] Step S4: Recognize and process rare characters on the target certificate, and then print based on the attribute-specific printing parameters and the matching certificate printing template.

[0011] Preferably, the target document is the document that needs to be printed, the target document image is the document image that needs to be printed, and the preprocessing operation includes image denoising and image enhancement; in setting corresponding document printing parameters for different documents, the document printing parameters specifically include line spacing, font size, page margins, image resolution and color model.

[0012] Preferably, the attribute classification of the certificate is specifically as follows:

[0013] The certificates are divided into three attribute categories: temporary certificates, formal certificates and encrypted certificates. The attribute-specific printing parameters are specifically paper types, including ordinary paper, thick paper and anti-counterfeiting paper. When the certificate attribute category is temporary certificate, the corresponding attribute-specific printing parameters are ordinary paper; when the certificate attribute category is formal certificate, the corresponding attribute-specific printing parameters are thick paper; when the certificate attribute category is encrypted certificate, the corresponding attribute-specific printing parameters are anti-counterfeiting paper.

[0014] Preferably, the priority of setting the attribute-specific printing parameters is specifically as follows:

[0015] The attribute-specific printing parameters of an encrypted certificate take precedence over the attribute-specific printing parameters of a formal certificate and a temporary certificate; if a certificate is both a formal certificate and an encrypted certificate, it will be treated as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used; if a certificate is both a temporary certificate and an encrypted certificate, it will be treated as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used.

[0016] Preferably, the specific method of obtaining the certificate name based on the target certificate image and obtaining the successfully matched certificate printing template and certificate printing parameters is:

[0017] Image recognition technology is used to obtain the ID name in the target ID image and convert it into a corresponding feature vector. The ID names corresponding to all ID printing templates are converted into feature vectors one by one. The similarity between the feature vector corresponding to the ID name of the target ID and the feature vector of the ID name corresponding to the ID printing template is calculated. The ID name corresponding to the ID printing template with the greatest similarity is used as the successfully matched ID name, the ID printing template corresponding to the successfully matched ID name is used as the successfully matched ID printing template, and the ID printing parameters corresponding to the successfully matched ID printing template are used as the successfully matched ID printing parameters.

[0018] Preferably, the specific method of obtaining the common fields and key fields in the target certificate is:

[0019] Step S31: performing image recognition on the target document image to obtain the fields of the target document;

[0020] Step S32: Obtaining a comprehensive criticality score of the field based on the spatial position score, semantic criticality score, and tamper-proof identification score of the field;

[0021] Step S33: Based on the comparison result of the comprehensive criticality score and the dynamic threshold, the fields are divided into common fields and key fields.

[0022] Preferably, the comprehensive criticality score of the field in step S32 is obtained in the following manner:

[0023] ;

[0024] in, Indicates the The comprehensive criticality score of each field, Indicates the The spatial position score of each field, Indicates the The semantic criticality score of each field, Indicates the The tamper-proof identification score of each field, satisfy .

[0025] Preferably, the spatial position score of the field is determined by its regional position in the certificate, the semantic criticality score of the field is determined by the preset label of the field name, and the tamper-proof identification score of the field is determined by the field encryption status.

[0026] Preferably, the specific method of obtaining the document attribute category of the target document is:

[0027] The document name is obtained based on the target document image, and the feature similarity between the document name and the document attribute category is calculated. The document attribute category corresponding to the feature vector with the largest similarity is used as the document attribute category of the target document; if the target document has an encryption identifier, the document attribute category is an encrypted document.

[0028] Preferably, in step S33, the specific manner of dividing the fields into common fields and key fields according to the comparison result of the comprehensive criticality score and the dynamic threshold is:

[0029] like , then determine the The fields are key fields;

[0030] like , then determine the The fields are normal fields;

[0031] described is the dynamic threshold.

[0032] The technical effects and advantages of the present invention are as follows:

[0033] The present invention is provided with step S2 and step S3, which is conducive to forming a certificate printing template by entering corresponding certificate printing parameters for different certificates, and updating the corresponding certificate printing parameters in real time when the certificate is revised, completing the real-time update of the certificate to ensure that the certificate printing template and printing parameters are the latest printing parameters that meet the requirements, and at the same time obtain the common fields and key fields in the target certificate to dynamically adjust the printing parameters; by automatically analyzing the certificate image to obtain the certificate printing template corresponding to the target certificate image, there is no need for manual search and query, and the certificate printing template can be directly matched for subsequent printing, and the printing parameters are distinguished for common fields and key fields to facilitate more reasonable adjustments, fully guaranteeing the quality and validity of the printed certificate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a flow chart of the template control method for simplifying certificate printing of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The template control method for simplifying certificate printing involved in the present invention is not limited to the various structures described in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example 1

[0036] like Figure 1 As shown, this embodiment provides a template control method for simplifying document printing, including the following steps:

[0037] Step S1: Acquire a target document image and perform a preprocessing operation on the target document image; the target document is the document to be printed, and the target document image is the document image to be printed. The preprocessing operation includes but is not limited to image denoising and image enhancement, and the preprocessing operation is performed on the original document image to achieve the purpose of improving image quality, reducing noise, and enhancing image features;

[0038] Step S2: Enter corresponding ID printing parameters for different ID cards to form an ID printing template, and update the corresponding ID printing parameters in real time when the ID card is revised; at the same time, classify the ID card attributes, obtain attribute-specific printing parameters, and set priorities for the attribute-specific printing parameters;

[0039] Step S3: Based on the target ID image, the ID name is obtained, and the ID printing template and ID printing parameters of the successfully matched ID are obtained. The ID attribute category of the target ID is also obtained, and the attribute-specific printing parameters corresponding to the target ID are obtained. Common fields and key fields in the target ID are obtained, and the printing parameters are dynamically adjusted. The purpose of this is to automatically analyze the ID image to obtain the ID printing template corresponding to the target ID image, eliminating the need for manual search and query, and directly matching the ID printing template for subsequent printing. At the same time, the printing parameters are reasonably adjusted for common fields and key fields.

[0040] Step S4: Recognize and process rare characters on the target certificate to avoid font loss, and then print based on attribute-specific printing parameters and a matching certificate printing template.

[0041] In this embodiment, it should be specifically explained that, in the setting of corresponding ID printing parameters for different IDs, the ID printing parameters specifically include but are not limited to line spacing, font size, page margins, image resolution, and color model; the ID printing parameters are standard values specified when the ID is printed. For example, if ID A is required to be printed in Songti font, the font size in the ID printing parameters is Songti font; when the ID is revised, the corresponding ID printing parameters are updated in real time, that is, the standard values specified when the ID is printed are updated in real time;

[0042] The attribute classification of the certificate is specifically as follows:

[0043] The certificates are divided into three attribute categories: temporary certificates, official certificates, and encrypted certificates. The attribute-specific printing parameters are specifically paper types, including plain paper, thick paper, and anti-counterfeiting paper. When the certificate attribute category is temporary certificate, the corresponding attribute-specific printing parameter is plain paper; when the certificate attribute category is official certificate, the corresponding attribute-specific printing parameter is thick paper; when the certificate attribute category is encrypted certificate, the corresponding attribute-specific printing parameter is anti-counterfeiting paper.

[0044] The priority of setting attribute-specific printing parameters is as follows:

[0045] The attribute-specific printing parameters of an encrypted certificate take precedence over the attribute-specific printing parameters of a formal certificate and a temporary certificate. For example, if a certificate is both a formal certificate and an encrypted certificate, it will be regarded as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used. If a certificate is both a temporary certificate and an encrypted certificate, it will be regarded as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used. Since a certificate cannot be both a formal certificate and a temporary certificate, there is no priority relationship between formal certificates and temporary certificates.

[0046] In this embodiment, it should be specifically explained that the specific method of obtaining the ID name based on the target ID image and obtaining the successfully matched ID printing template and ID printing parameters is as follows:

[0047] Using image recognition technology to obtain the ID name in the target ID image and convert it into a corresponding feature vector, converting the ID names corresponding to all ID printing templates into feature vectors one by one, calculating the similarity between the feature vector corresponding to the ID name of the target ID and the feature vector of the ID name corresponding to the ID printing template, taking the ID name corresponding to the ID printing template with the greatest similarity as the successfully matched ID name, taking the ID printing template corresponding to the successfully matched ID name as the successfully matched ID printing template, and taking the ID printing parameters corresponding to the successfully matched ID printing template as the successfully matched ID printing parameters;

[0048] The method of converting the certificate name into the corresponding feature vector can adopt a word vector model such as a BERT model; the similarity between the feature vectors can be calculated using any similarity calculation method such as Euclidean distance or cosine similarity.

[0049] In this embodiment, it should be specifically explained that the specific method of obtaining the common fields and key fields in the target certificate is:

[0050] Step S31: performing image recognition on the target document image to obtain the fields of the target document;

[0051] Step S32: Obtaining a comprehensive criticality score of the field based on the spatial position score, semantic criticality score, and tamper-proof identification score of the field;

[0052] Step S33: Based on the comparison result of the comprehensive criticality score and the dynamic threshold, the fields are divided into common fields and key fields.

[0053] In this embodiment, it should be specifically explained that the method for obtaining the comprehensive criticality score of the field in step S32 is specifically as follows:

[0054] ;

[0055] in, Indicates the The comprehensive criticality score of each field, Indicates the The spatial position score of each field, Indicates the The semantic criticality score of each field, Indicates the The tamper-proof identification score of each field, satisfy ; The specific value of can be set by those skilled in the art according to different types of certificates. , , If there are no semantic labels for many key areas of the document, such as photo type, the The value of The value of

[0056] The spatial position score of the field is determined by its regional position in the document, the semantic criticality score of the field is determined by the preset label of the field name, and the tamper-proof identification score of the field is determined by the field encryption status; specifically:

[0057] Mark the key areas in the ID printing template in advance. For example, the photo area can be marked as the key area. Get the marked areas in the ID printing template that matches successfully. If the area position of the field in the ID card overlaps with the marked area in the ID printing template that matches successfully, and the area ratio of the overlapping area is , then the spatial position score is 1, otherwise the spatial position score is 0;

[0058] All field names in the ID printing template are pre-labeled, divided into "key information" and "auxiliary information" tags. When the pre-labeled field name in the target ID is "key information", the semantic criticality score is 1; when the pre-labeled field name is "auxiliary information", the semantic criticality score is 0.2.

[0059] If the field has an anti-tampering flag, the anti-tampering flag score is 1. If the field does not have an anti-tampering flag, the anti-tampering flag score is 0.

[0060] In this embodiment, it should be specifically explained that the specific manner of dividing the fields into common fields and key fields according to the comparison result between the comprehensive criticality score and the dynamic threshold in step S33 is as follows:

[0061] like , then determine the The fields are key fields;

[0062] like , then determine the The fields are normal fields;

[0063] described is a dynamic threshold, which can be set by those skilled in the art according to actual conditions. ;

[0064] The printing parameters can be appropriately adjusted in the certificate printing template based on the difference between common fields and key fields. Due to different printer models or different printing paper sizes during printing, the printing parameters need to be appropriately adjusted to ensure the overall printing effect; the common fields in the target certificate are allowed to dynamically adjust their positions (such as automatic line wrap) in the successfully matched certificate printing template to adapt to actual printing needs. The key fields in the target certificate are strictly output according to the certificate printing parameters in the successfully matched certificate printing template to ensure the validity of the certificate after printing.

[0065] In this embodiment, it should be specifically explained that the specific method of obtaining the document attribute category of the target document is:

[0066] Obtain the ID name based on the target ID image, calculate the feature similarity between the ID name and the ID attribute category, and use the ID attribute category corresponding to the feature vector with the largest similarity as the ID attribute category of the target ID; if the target ID has an encryption identifier, the ID attribute category is an encrypted ID;

[0067] By obtaining the document attribute category of the target document, the attribute-specific printing parameters of the target document, that is, the selection of paper type, can be obtained to further improve the printing quality and printing effect. Example 2

[0068] This embodiment provides a template control method for simplifying document printing, including the following steps:

[0069] Step S1: Acquire a target document image and perform preprocessing operations on the target document image;

[0070] Step S2: Enter corresponding ID printing parameters for different ID cards to form an ID printing template, and update the corresponding ID printing parameters in real time when the ID card is revised; at the same time, classify the ID card attributes, obtain attribute-specific printing parameters, and set priorities for the attribute-specific printing parameters;

[0071] Step S3: Obtain the document name based on the target document image, obtain the matching document printing template and document printing parameters, and simultaneously obtain the document attribute category of the target document to obtain the attribute-specific printing parameters corresponding to the target document; obtain the common fields and key fields in the target document and dynamically adjust the printing parameters;

[0072] Step S4: Recognize and process rare characters on the target certificate to avoid font loss, and then print based on attribute-specific printing parameters and a matching certificate printing template.

[0073] In this embodiment, it should be specifically explained that the step S4 of recognizing and processing rare characters on the target certificate specifically includes:

[0074] Step S41: Identify rare characters in the target document text based on Unicode code range and font library coverage detection;

[0075] Step S42: If the rare character is not supported by the current font library, an alternative font is searched through a glyph similarity matching algorithm or vector glyph synthesis is triggered;

[0076] Step S43: embedding the substitute glyph or the synthesized glyph into the print data stream to ensure complete rendering of the uncommon characters;

[0077] Step S44: performing resolution adaptation on the glyph processed in step S43 and outputting it to a printing device for execution.

[0078] In this embodiment, it should be specifically explained that the formula of the glyph similarity matching algorithm in step S42 is expressed as:

[0079] ;

[0080] in, Represents the similarity matching score, Indicates rare characters in the target document that are not supported by the current font library. Indicates candidate replacement characters; The reciprocal of the difference in the number of strokes. The smaller the difference, the higher the score. Indicates the radical matching degree, calculated based on the proportion of shared radicals; and They are the corresponding weight coefficients. In this embodiment, , ; Those skilled in the art can also make and The values of are modified reasonably. This embodiment only provides reference values and does not limit specific values.

[0081] The font with the highest similarity matching score is selected as the substitute font to replace the rare characters that are not supported by the font library.

[0082] In this embodiment, it should be specifically noted that the parts not described in detail in this embodiment are the same as those in Example 1.

[0083] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0084] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A template control method for simplifying document printing, characterized by: The following steps are involved: Step S1: Acquire a target document image and perform preprocessing operations on the target document image; Step S2: Enter corresponding ID printing parameters for different ID cards to form an ID printing template, and update the corresponding ID printing parameters in real time when the ID card is revised; at the same time, classify the ID card attributes, obtain attribute-specific printing parameters, and set priorities for the attribute-specific printing parameters; Step S3: Obtain the document name based on the target document image, obtain the matching document printing template and document printing parameters, and simultaneously obtain the document attribute category of the target document to obtain the attribute-specific printing parameters corresponding to the target document; obtain the common fields and key fields in the target document and dynamically adjust the printing parameters; Step S4: Recognize and process rare characters on the target ID, and then print based on the attribute-specific printing parameters and the matching ID printing template; The specific method of obtaining the common fields and key fields in the target certificate is: Step S31: performing image recognition on the target document image to obtain the fields of the target document; Step S32: Obtaining a comprehensive criticality score of the field based on the spatial position score, semantic criticality score, and tamper-proof identification score of the field; Step S33: Divide the fields into common fields and key fields based on the comparison result of the comprehensive criticality score and the dynamic threshold; The attribute classification of the certificate is specifically as follows: The certificates are divided into three attribute categories: temporary certificates, formal certificates and encrypted certificates. The attribute-specific printing parameters are specifically paper types, including ordinary paper, thick paper and anti-counterfeiting paper. When the certificate attribute category is temporary certificate, the corresponding attribute-specific printing parameters are ordinary paper; when the certificate attribute category is formal certificate, the corresponding attribute-specific printing parameters are thick paper; when the certificate attribute category is encrypted certificate, the corresponding attribute-specific printing parameters are anti-counterfeiting paper.

2. The template control method for simplifying ID printing according to claim 1, characterized in that: The target document is the document that needs to be printed, the target document image is the document image that needs to be printed, and the preprocessing operation includes image denoising and image enhancement; in setting corresponding document printing parameters for different documents, the document printing parameters specifically include line spacing, font size, page margins, image resolution and color model.

3. The template control method for simplifying ID printing according to claim 2, characterized in that: The priority of setting attribute-specific printing parameters is as follows: The attribute-specific printing parameters of an encrypted certificate take precedence over the attribute-specific printing parameters of a formal certificate and a temporary certificate; if a certificate is both a formal certificate and an encrypted certificate, it will be treated as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used; if a certificate is both a temporary certificate and an encrypted certificate, it will be treated as an encrypted certificate and the attribute-specific printing parameters of the encrypted certificate will be used.

4. The template control method for simplifying ID printing according to claim 3, characterized in that: The specific method of obtaining the certificate name based on the target certificate image and obtaining the successfully matched certificate printing template and certificate printing parameters is as follows: Image recognition technology is used to obtain the ID name in the target ID image and convert it into a corresponding feature vector. The ID names corresponding to all ID printing templates are converted into feature vectors one by one. The similarity between the feature vector corresponding to the ID name of the target ID and the feature vector of the ID name corresponding to the ID printing template is calculated. The ID name corresponding to the ID printing template with the greatest similarity is used as the successfully matched ID name, the ID printing template corresponding to the successfully matched ID name is used as the successfully matched ID printing template, and the ID printing parameters corresponding to the successfully matched ID printing template are used as the successfully matched ID printing parameters.

5. The template control method for simplifying ID printing according to claim 4, characterized in that: The method for obtaining the comprehensive criticality score of the field in step S32 is specifically as follows: ； in, Indicates the The comprehensive criticality score of each field, Indicates the The spatial position score of each field, Indicates the The semantic criticality score of each field, Indicates the The tamper-proof identification score of each field, satisfy .

6. The template control method for simplifying ID printing according to claim 5, characterized in that: The spatial position score of the field is determined by its regional position in the document, the semantic criticality score of the field is determined by the preset label of the field name, and the tamper-proof identification score of the field is determined by the field encryption status.

7. The template control method for simplifying ID printing according to claim 6, characterized in that: The specific method of obtaining the certificate attribute category of the target certificate is: The document name is obtained based on the target document image, and the feature similarity between the document name and the document attribute category is calculated. The document attribute category corresponding to the feature vector with the largest similarity is used as the document attribute category of the target document; if the target document has an encryption identifier, the document attribute category is an encrypted document.

8. The template control method for simplifying ID printing according to claim 7, characterized in that: In step S33, the specific method of dividing the fields into common fields and key fields according to the comparison result of the comprehensive criticality score and the dynamic threshold is as follows: like , then determine the The fields are key fields; like , then determine the The fields are normal fields; described is the dynamic threshold.

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