CN107633201B - Intelligent identification method and system for answer sheet - Google Patents
Intelligent identification method and system for answer sheet Download PDFInfo
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- CN107633201B CN107633201B CN201710668158.XA CN201710668158A CN107633201B CN 107633201 B CN107633201 B CN 107633201B CN 201710668158 A CN201710668158 A CN 201710668158A CN 107633201 B CN107633201 B CN 107633201B
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Abstract
The invention provides an intelligent identification method and system for an answer sheet, wherein the method comprises the following steps: the client reads the question card identification ID number carried in the two-dimensional code, carries the question card identification ID number in the question card template data acquisition request under the condition that the question card identification ID number is not equal to the question card template identification ID number corresponding to the current question card template, and sends the request; the server side searches the question card template and sends the question card template to the client side; and loading the question card template by the client, carrying out image identification on the filling area in the question card picture and acquiring filling information of all filling points of the question card picture. The system comprises a client and a server, wherein the client comprises: the system comprises a scanning module, a reading module, a processing module and an identification module, wherein the server side comprises a searching module. The invention solves the problems of time and labor waste caused by manual classification or manual screening of a large number of answer sheets in a large-scale examination, reduces the working intensity of workers and improves the accuracy of answer sheet identification.
Description
Technical Field
The invention relates to the technical field of intelligent identification of answer sheets, in particular to an intelligent identification method and system of answer sheets.
Background
At present, various large and medium-sized examinations can complete the identification of examination numbers and objective answer questions in answer sheets by using a computer-aided examination reading mode, so that the work intensity of teacher reading is greatly reduced, and the examination reading efficiency is improved.
The existing question card identification system identifies a plurality of answer sheets based on a question card template, wherein the type of the question card of the answer sheet is required to be consistent with the type of the current question card template in the question card identification system. In order to accurately identify the answer sheet by the answer sheet identification system, before the answer sheet is scanned and identified, the staff can strictly classify the answer sheet according to the type of the test paper so as to ensure that the type of the answer sheet to be scanned and identified and the type of the current answer sheet template in the answer sheet identification system belong to the same type of the test paper. In practice, if a plurality of answer sheets to be scanned and identified are not classified according to the types of test paper, or if answer sheets of other types of test paper are mixed in a plurality of answer sheets of the same type of test paper, a problem occurs in which only one type of test paper can be accurately identified, but answer sheets of other types of test paper cannot be identified. Therefore, the staff needs to reclassify the answer sheet according to the type of the test paper or select the answer sheet of other test paper types, and recheck each answer sheet. For large-scale examinations, the number of answer sheets is large, so that manual classification or manual screening is time-consuming and labor-consuming, and the working intensity of workers is undoubtedly increased.
Disclosure of Invention
The invention aims to provide an answer sheet intelligent identification method and system, which can scan and identify answer sheets of different test paper types, and solve the technical problems that when a plurality of answer sheets to be scanned and identified are not classified by test paper types, or answer sheets of other test paper types are mixed in a plurality of answer sheets of the same test paper type, only one of the answer sheets of the test paper type can be accurately identified, but the answer sheets of other test paper types cannot be identified; meanwhile, the problem that manual classification or manual screening of a large number of answer sheets in a large-scale examination is time-consuming and labor-consuming is solved, the working intensity of workers is reduced, and the accuracy of answer sheet identification is improved.
The technical scheme provided by the invention is as follows:
an intelligent answer sheet identification method comprises the following steps:
the client receives the question card picture with the two-dimensional code, reads the question card identification ID number carried in the two-dimensional code, carries the question card identification ID number in the question card template data acquisition request to be sent under the condition that the question card identification ID number is not equal to the question card template identification ID number corresponding to the current question card template, and sends the request;
the server side receives the question card template data acquisition request, searches the question card template in the question card template information base by taking the question card identification ID number as an index value, and sends the question card template to the client side;
and the client receives and loads the question card template, performs image identification on the filling area in the question card picture and acquires filling information of all filling points of the question card picture.
Further, after the client reads the question card identification ID number carried in the two-dimensional code, the method further includes:
and under the condition that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, the client loads the current question card template, performs image recognition on the question card picture filling area and acquires filling information of all filling points of the question card picture.
Further, image recognition is carried out on the filling area in the question card picture, and filling information of all filling points in the question card picture is obtained, wherein the method comprises the following steps:
reading array information of filling points in a filling area recorded by a question card template, and determining the positions of the filling points in the filling area;
respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and judging whether each filling point is filled or not according to the gray value and the filling area of the filling point, and forming a filling result.
Further, before the client receives the question card picture with the two-dimensional code, the method further comprises the following steps:
the client receives a blank question card picture with the two-dimensional code and reads a question card Identification (ID) number carried in the two-dimensional code;
carrying out image identification on the filling area in the blank header card picture and acquiring characteristic information of all filling points in the filling area;
generating a question card template by all the filling point characteristic information, taking the question card identification ID number as the question card template identification ID number and establishing an index relation with the question card template;
and sending the question card template to a server.
Further, the method for carrying out image recognition on the blank question card picture filling area and acquiring the feature information of all filling points of the question card picture comprises the following steps:
removing grid lines of a filling area in the theme card picture by a corrosion and expansion method, and reserving matrix information of filling points; after the filling area in the card picture is expanded again, projecting filling points from the horizontal direction and the vertical direction to obtain coordinate information of the filling points; and packaging the coordinate information of the filling points into array information of the filling points.
An intelligent identification system for answer sheet comprises a client and a server connected with the client in data communication,
the client comprises:
the scanning module is used for scanning the answer sheet and generating an answer sheet picture with a two-dimensional code;
the reading module is in data communication connection with the scanning module and is used for receiving the question card picture with the two-dimensional code and reading the question card identification ID number carried in the two-dimensional code;
the processing module is in data communication connection with the reading module and is used for judging whether the identification ID number of the question card is consistent with the identification ID number of the question card template corresponding to the current question card template or not, carrying the identification ID number of the question card in a question card template data acquisition request to be sent under the condition of judging that the identification ID number of the question card is not equal to the identification ID number of the question card template corresponding to the current question card template, and sending the request;
the identification module is in data communication connection with the processing module and is used for receiving and loading the question card template, carrying out image identification on the filling area in the question card picture and acquiring filling information of all filling points of the question card picture;
the server side includes:
and the searching module is used for receiving the data obtaining request of the question card template, searching the question card template in the question card template information base by taking the ID number of the question card identification as an index value, and sending the searched question card template to the client.
Further, under the condition that the processing module judges that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template,
the identification module is also used for loading the current question card template, carrying out image identification on the question card picture filling area and obtaining filling information of all filling points of the question card picture.
Further, the identification module includes:
the position confirmation unit is used for reading array information of filling points in a filling area recorded by the question card template and determining the positions of the filling points in the filling area; the array information of the filling point comprises array information of the upper left corner of the filling point and length and width information of an area included by the filling point.
The detection unit is used for respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and the result generating unit is used for judging whether each filling point is filled according to the gray value and the filling area of the filling point and forming a filling result.
Further, before receiving the title card picture with the two-dimensional code,
the reading module is also used for receiving a blank question card picture with the two-dimensional code and reading a question card Identification (ID) number carried in the two-dimensional code;
the identification module is also used for carrying out image identification on the filling area in the blank question card picture and acquiring characteristic information of all filling points in the filling area;
the processing module is also used for generating a question card template by the characteristic information of all the filling points, taking the ID number of the question card as the ID number of the question card template, establishing an index relation with the question card template and sending the question card template to the server.
Further, the identification module further comprises:
the grid line removing unit is used for removing the grid lines of the filling area in the thematic card picture by a corrosion and expansion method and reserving the matrix information of the filling points;
the filling point coordinate information acquisition unit is used for projecting filling points from the horizontal direction and the vertical direction after the filling area in the card picture is expanded again to obtain the coordinate information of the filling points;
and the packaging unit is used for packaging the coordinate information of the filling points into array information of the filling points.
The method comprises the steps that a received picture with a two-dimensional code is identified and read through a client, a question card Identification (ID) number carried in the two-dimensional code is obtained, and a question card template obtaining request carrying the question card Identification (ID) number is transmitted to a server; the server side searches the question card template data corresponding to the question card identification ID number in the question card template database and sends the question card template data to the client side, and the client side loads the question card template data and identifies the question card picture by using a picture identification technology to obtain all filling point information of a filling area in the question card picture. Because each answer sheet is provided with a two-dimensional code of a test paper type, and the ID number of the answer sheet carried by the two-dimensional code corresponds to the answer sheet template data in the answer sheet template database, the identification of all answer sheets can be completed.
The invention has the following beneficial effects:
1. the invention can scan and identify the answer sheets of different test paper types, and the accuracy rate of the answer sheet identification is high;
2. the invention solves the technical problems that a plurality of answer sheets to be scanned and identified are not classified according to the types of test paper, or answer sheets of other test paper types are mixed in a plurality of answer sheets of the same test paper type, so that only one answer sheet of the test paper type can be accurately identified, and the answer sheets of other test paper types cannot be identified;
3. the problem that time and labor are wasted due to manual classification or manual screening of a large number of answer sheets in a large-scale examination is solved, the working intensity of workers is reduced, and the accuracy of answer sheet identification is improved;
4. the invention solves the technical problem that the existing answer sheet intelligent identification system does not support hybrid scanning.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of blank question card identification according to the present invention;
FIG. 2 is a flowchart of image recognition of a blank question mark picture fill-in area according to the present invention;
FIG. 3 is a flow chart of the identification of the subject card according to the present invention;
FIG. 4 is a flowchart of image recognition of a filling area in a question mark picture according to the present invention;
fig. 5 is a schematic structural diagram of an intelligent identification system for an answer sheet according to the present invention;
fig. 6 is a flowchart of an intelligent answer sheet identification method according to an embodiment of the invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
An intelligent identification method for answer sheet includes two identification processes, namely blank answer sheet identification process and answer sheet identification process with filling information.
As shown in fig. 1, the blank question card identification process:
s101, a client receives a blank question card picture with a two-dimensional code and reads a question card Identification (ID) number carried in the two-dimensional code;
s102, carrying out image identification on a filling area in the blank question card picture and acquiring characteristic information of all filling points in the filling area;
and S103, generating a question card template by using all the filling point characteristic information, establishing an index relation with the question card template by using the question card identification ID number as the question card template identification ID number, and sending the question card template to the server.
In step S102, performing image recognition on the blank question card picture filling area and acquiring feature information of all filling points of the question card picture, as shown in fig. 2, the implementation manner includes:
s201, removing grid lines of a filling area in the question card picture by a corrosion and expansion method, and reserving matrix information of filling points;
s202, after the filling area in the card picture is expanded again, projecting filling points in the horizontal direction and the vertical direction to obtain coordinate information of the filling points;
and S203, packaging the coordinate information of the filling points into array information of the filling points.
As shown in fig. 3, the question card identification process:
s301, the client receives the question card picture with the two-dimensional code and reads the question card identification ID number carried in the two-dimensional code;
s302, the client judges whether the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template or not;
s303, under the condition that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, the client loads the current question card template, performs image recognition on the question card picture filling area and acquires filling information of all filling points of the question card picture;
s304, carrying the identification ID number of the question card in a question card template data acquisition request to be sent and sending the request under the condition that the identification ID number of the question card is not equal to the identification ID number of the question card template corresponding to the current question card template;
s305, the server side receives the question card template data acquisition request, searches the question card template in a question card template information base by taking the question card identification ID number as an index value, and sends the question card template to the client side;
s306, the client receives and loads the question card template, performs image recognition on the filling area in the question card picture and acquires filling information of all filling points of the question card picture.
In step S303 and step S306, performing image recognition on the filling area in the topic card picture and acquiring filling information of all filling points in the topic card picture, as shown in fig. 4, the implementation method specifically includes:
s401, reading array information of filling points in a filling area recorded by a question card template, and determining the positions of the filling points in the filling area;
s402, respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and S403, judging whether each filling point is filled according to the gray value and the filling area of the filling point, and forming a filling result.
As shown in fig. 5, an intelligent identification system for an answer sheet comprises a client and a server in data communication connection with the client, wherein the client comprises:
the scanning module is used for scanning the answer sheet and generating an answer sheet picture with a two-dimensional code;
the reading module is in data communication connection with the scanning module and is used for receiving the question card picture with the two-dimensional code and reading the question card identification ID number carried in the two-dimensional code;
the processing module is in data communication connection with the reading module and is used for judging whether the identification ID number of the question card is consistent with the identification ID number of the question card template corresponding to the current question card template or not, carrying the identification ID number of the question card in a question card template data acquisition request to be sent under the condition of judging that the identification ID number of the question card is not equal to the identification ID number of the question card template corresponding to the current question card template, and sending the request;
the identification module is in data communication connection with the processing module and is used for receiving and loading the question card template, carrying out image identification on the filling area in the question card picture and acquiring filling information of all filling points of the question card picture;
and under the condition that the processing module judges that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, the identification module is also used for loading the current question card template, carrying out image identification on the filling area of the question card picture and acquiring filling information of all filling points of the question card picture.
The identification module carries out image identification on the filling area in the question card picture and acquires filling information of all filling points of the question card picture, and the identification module further comprises:
the position confirmation unit is used for reading array information of filling points in a filling area recorded by the question card template and determining the positions of the filling points in the filling area;
the detection unit is used for respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and the result generating unit is used for judging whether each filling point is filled according to the gray value and the filling area of the filling point and forming a filling result.
The reading module, the identification module and the processing module are also used for identifying blank question cards, and specifically comprise the following steps:
the reading module is also used for receiving a blank question card picture with the two-dimensional code and reading a question card Identification (ID) number carried in the two-dimensional code;
the identification module is further used for carrying out image identification on the filling area in the blank question card picture and acquiring characteristic information of all filling points in the filling area, wherein the identification module comprises:
the grid line removing unit is used for removing the grid lines of the filling area in the thematic card picture by a corrosion and expansion method and reserving the matrix information of the filling points;
the filling point coordinate information acquisition unit is used for projecting filling points from the horizontal direction and the vertical direction after the filling area in the card picture is expanded again to obtain the coordinate information of the filling points;
the packaging unit is used for packaging the coordinate information of the filling point into array information of the filling point, wherein the array information of the filling point comprises the array information of the upper left corner of the filling point and the length and width information of an area included by the filling point;
the processing module is also used for generating a question card template by the characteristic information of all the filling points, taking the ID number of the question card as the ID number of the question card template, establishing an index relation with the question card template and sending the question card template to the server.
The server side includes:
and the searching module is used for receiving the data obtaining request of the question card template, searching the question card template in the question card template information base by taking the ID number of the question card identification as an index value, and sending the searched question card template to the client.
Example (b):
as shown in fig. 6, an intelligent identification method for an answer sheet includes:
s501, scanning subject cards: the scanning module scans the answer sheet carrying the full-filling information and generates an answer sheet picture with a two-dimensional code;
s502, question card loading and two-dimensional code identification: the reading module receives the question card picture with the two-dimensional code and reads the question card identification ID number carried in the two-dimensional code;
s503, checking the template: the processing module judges whether the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, and enters step S504 when judging that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, and enters step S505 when judging that the identification ID number of the question card is not equal to the identification ID number of the question card template corresponding to the current question card template;
s504, template loading and question card identification: and the processing module loads the current question card template, performs image identification on the question card picture filling area and acquires filling information of all filling points of the question card picture, then jumps to the step S501, enters the next round of question card identification process until all question cards are identified and ends the process.
S505, template request: the processing module carries the ID number of the question card identification in a question card template data acquisition request to be sent, and sends the request;
s506, template sending: the in-client searching module receives the question card template data acquisition request, searches the question card template in the question card template information base by taking the question card identification ID number as an index value, and sends the question card template to the client;
s507, template loading and question card identification: the processing module loads the question card template from the server, performs image recognition on the question card picture filling area, acquires filling information of all filling points of the question card picture, then jumps to step S501, enters the next round of question card recognition process until all question cards are recognized and ends the process.
Claims (6)
1. An intelligent answer sheet identification method is characterized by comprising the following steps:
the client receives a blank question card picture with the two-dimensional code and reads a question card Identification (ID) number carried in the two-dimensional code; carrying out image identification on the filling area in the blank header card picture and acquiring characteristic information of all filling points in the filling area; generating a question card template by all the filling point characteristic information, taking the question card identification ID number as the question card template identification ID number and establishing an index relation with the question card template; sending the question card template to a server;
the method comprises the steps that a client receives a question card picture with a two-dimensional code, reads a question card identification ID number carried in the two-dimensional code, carries the question card identification ID number in a question card template data acquisition request to be sent under the condition that the question card identification ID number is not equal to a question card template identification ID number corresponding to a current question card template, and sends the request;
the server side receives the question card template data acquisition request, searches the question card template in the question card template information base by taking the question card identification ID number as an index value, and sends the question card template to the client side;
the client receives and loads the question card template, performs image recognition on the filling area in the question card picture and acquires filling information of all filling points of the question card picture;
the method comprises the following steps of carrying out image identification on a blank question card picture filling area and acquiring the characteristic information of all filling points of a question card picture, wherein the method comprises the following steps: removing grid lines of a filling area in the theme card picture by a corrosion and expansion method, and reserving matrix information of filling points; after the filling area in the card picture is expanded again, projecting filling points from the horizontal direction and the vertical direction to obtain coordinate information of the filling points; and packaging the coordinate information of the filling points into array information of the filling points.
2. The intelligent answer sheet identification method of claim 1, wherein after the client reads the answer sheet identification ID carried in the two-dimensional code, the method further comprises:
and under the condition that the identification ID number of the question card is equal to the identification ID number of the question card template corresponding to the current question card template, the client loads the current question card template, performs image recognition on the question card picture filling area and acquires filling information of all filling points of the question card picture.
3. The intelligent identification method of answer sheets according to claim 1 or 2,
carrying out image recognition on the filling area in the question card picture and acquiring filling information of all filling points of the question card picture, wherein the method comprises the following steps:
reading array information of filling points in a filling area recorded by a question card template, and determining the positions of the filling points in the filling area;
respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and judging whether each filling point is filled or not according to the gray value and the filling area of the filling point, and forming a filling result.
4. An intelligent identification system for answer sheets is characterized in that the system comprises a client and a server which is in data communication connection with the client,
the client comprises:
the scanning module is used for scanning the answer sheet and generating an answer sheet picture with a two-dimensional code;
the reading module is in data communication connection with the scanning module and is used for receiving the question card picture with the two-dimensional code and reading the question card identification ID number carried in the two-dimensional code;
the processing module is in data communication connection with the reading module and is used for judging whether the identification ID number of the question card is consistent with the identification ID number of the question card template corresponding to the current question card template or not, carrying the identification ID number of the question card in a question card template data acquisition request to be sent under the condition of judging that the identification ID number of the question card is not equal to the identification ID number of the question card template corresponding to the current question card template, and sending the request;
the identification module is in data communication connection with the processing module and is used for receiving and loading the question card template, carrying out image identification on the filling area in the question card picture and acquiring filling information of all filling points of the question card picture;
the reading module is also used for receiving a blank question card picture with the two-dimensional code and reading a question card identification ID number carried in the two-dimensional code;
the identification module is also used for carrying out image identification on the filling area in the blank question card picture and acquiring characteristic information of all filling points in the filling area;
the processing module is also used for generating a question card template from all the filling point characteristic information, taking the ID number of the question card as the ID number of the question card template, establishing an index relationship with the question card template and sending the question card template to the server;
the identification module further comprises:
the grid line removing unit is used for removing the grid lines of the filling area in the question card picture by a corrosion and expansion method and reserving the matrix information of filling points;
the filling point coordinate information acquisition unit is used for projecting filling points from the horizontal direction and the vertical direction after the filling area in the card picture is expanded again to obtain the coordinate information of the filling points;
the packaging unit is used for packaging the coordinate information of the filling points into array information of the filling points;
the server side includes:
and the searching module is used for receiving the data obtaining request of the question card template, searching the question card template in the question card template information base by taking the ID number of the question card identification as an index value, and sending the searched question card template to the client.
5. The intelligent answer sheet identification system of claim 4, wherein in case the processing module determines that the answer sheet ID number is equal to the answer sheet template ID number corresponding to the current answer sheet template,
the identification module is also used for loading the current question card template, carrying out image identification on the question card picture filling area and obtaining filling information of all filling points of the question card picture.
6. The intelligent identification system of answer sheets according to claim 4 or 5,
the identification module comprises:
the position confirmation unit is used for reading array information of the filling points in the filling area recorded by the question card template and determining the positions of the filling points in the filling area;
the detection unit is used for respectively positioning to each filling point position, detecting a gray value in each filling point position and calculating a filling area in each filling point;
and the result generating unit is used for judging whether each filling point is filled according to the gray value and the filling area of the filling point and forming a filling result.
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| CN108763260A (en) * | 2018-03-30 | 2018-11-06 | 广东小天才科技有限公司 | A kind of examination question searching method, system and terminal device |
| CN110765995A (en) * | 2019-10-11 | 2020-02-07 | 深圳市鹰硕技术有限公司 | Answer sheet generation method, answer sheet identification device and storage medium |
| CN111258938B (en) * | 2019-11-07 | 2021-12-17 | 深圳市远行科技股份有限公司 | Method and equipment for processing application docking service provider to be adapted |
| CN111126227B (en) * | 2019-12-17 | 2023-08-08 | 广东德诚科教有限公司 | Detection method for scanning and collecting abnormal answer sheet |
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| CN100514357C (en) * | 2004-09-03 | 2009-07-15 | 深圳市海云天科技有限公司 | Information identification method of full-filling information card |
| CN101334814A (en) * | 2008-04-28 | 2008-12-31 | 华北电力大学 | Automatic scanning and reading system and reading method |
| CN102799776A (en) * | 2012-07-10 | 2012-11-28 | 富士施乐实业发展（上海）有限公司 | Automatic examination paper processing system |
| CN102932761B (en) * | 2012-10-31 | 2016-05-18 | 重庆秒银科技有限公司 | Incoming call connection information display processing method based on cell-phone visiting card |
| CN103839090A (en) * | 2012-11-26 | 2014-06-04 | 张龙斌 | Two-dimensional code label management method and system |
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| CN104239850B (en) * | 2014-07-16 | 2017-12-01 | 华南理工大学 | Answer card filling information automatic recognition method based on image synthesis feature |
| CN104239866B (en) * | 2014-09-16 | 2018-01-12 | 科大讯飞股份有限公司 | Answering card information collecting method and equipment |
| CN106373447A (en) * | 2016-09-18 | 2017-02-01 | 三星电子（中国）研发中心 | Intelligent paper marking system and method |
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