KR20160061753A - Examination paper recognition and scoring system - Google Patents

Abstract

The present invention relates to an examination paper recognizing and scoring system for recognizing an examination paper by automatically photographing the examination paper by using a reference marker in the examination paper, scoring the examination paper by extracting an answer region, and providing the result of scoring and problem-solving. Provided is a study system capable of recognizing an examination paper conveniently, rapidly and accurately without an OMR reader or a scanner by using a user terminal and capable of scoring all of objective tests, subjective tests and descriptive tests rapidly and accurately via data processing. The examination paper recognizing and scoring system comprises: an examination paper having a reference marker placed in a specific region and including an answer region; a user terminal having an application including a recognition program installed thereon to scan the whole examination paper; and a management server including a data processing part and a database part.

Description

[0002] Examination paper recognition and scoring system [0003]

The present invention relates to a test strip recognition and scoring system and method, and more particularly, to a test strip recognition apparatus that automatically recognizes test strips using standard markers in a test strip, extracts and scans answering area, And a scoring system.

Most of the evaluation methods such as grading of middle and high schools (including some elementary schools), college admissions, lecture evaluation, grading of other institutes, evaluation of mathematics ability, various national qualification tests and driving license test, Reader card or sheet is used.

When using such an OMR card or sheet, an expensive OMR card reader and a sheet reader are used to read them, and light is instantaneously transmitted through the sensor using a timing mark displayed on the OMR card or sheet A method of detecting a mark is used. This requires a considerable degree of sophistication in the printing or cutting of OMR cards or sheets, requiring special paper (mostly imported paper) and special printing. Such special paper and printing not only raises the production cost of OMR cards or sheets, but also has a lot of difficulties in securing a certain volume at each school every year in the beginning of the semester. In addition, since the use of such a timing mark is required to restrict the configuration of the answer display portion of the OMR card or sheet (the display configured to enable the examinee to display the answer) to be within a predetermined range, even if various examination methods are required, Answer sheets should be made to fit within the prescribed design style required by OMR card or sheet reader.

In addition, when the OMR card or sheet is used, since the direction in which the OMR card or sheet is inserted into the OMR card reader and the sheet reader is constantly determined according to the timing mark, the operation of correcting this direction also requires considerable time and effort.

In addition, it is sensitive to the external condition of the OMR card reader and the sheet reader (instantaneous current supply condition, sensor change due to the weather change, etc.), and unexpected errors in scoring are likely to occur.

In addition, the OMR card or sheet reader is very sensitive to the surface state of the OMR card or sheet, so that the examinee misunderstands that the answer made by the examinee with the correction fluid is mistakenly displayed, and the examinee has difficulty in correcting the answer .

In order to solve the above problems, an OMR reading method of reading an OMR card or a sheet by a scanner and reading the marking state through image correction has been disclosed (Korean Patent No. 10-0468461).

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a method and apparatus for easily and quickly recognizing test strips using a user terminal without a separate OMR reader or a scanner, And to provide a test strip recognition and scoring system that can be accurately performed.

According to an embodiment of the present invention, there is provided a test apparatus comprising: a test sheet having a reference marker having a photographing index function in a specific region and including an answer region; A recognition program capable of internally generating a guide line for grasping the position of the fiducial marker and automatically scanning the test papers when the recognition condition is satisfied by grasping the position of the fiducial markers, A user terminal in which an application including an application is installed and executed; And a management server including a data processing unit and a database unit, wherein the user terminal and the management server provide a test strip recognition and scoring system capable of transmitting test strip images and learning data through a wire / wireless communication network.

In addition, the reference marker, which is an embodiment of the present invention, is a polygon having three or four corners of the test strip and having a predetermined thickness, the guide line is at least two straight lines having a predetermined interval, Recognizes the border area as 1, recognizes the other areas as 0, recognizes only the reference markers that are recognized as 010 and 01010 on the straight line of the guide line as the reference marker, And a test mark recognition and scoring system is provided that automatically captures only when a fiducial marker is recognized.

Further, in the case where the reference marker, which is one embodiment of the present invention, is located at four of the corners of the test strip, the test strip further includes a rotation status discrimination unit.

The user terminal may further include a screen display unit, and the guide line may be displayed on the screen display unit to check the photographing state. The test sheet may include an OMR card answer sheet, a sheet or book form, and an answer sheet integrated test sheet.

Also, the data processing unit, which is an embodiment of the present invention, includes an image correction unit. The image correction unit removes noise of the transmitted test image through an image adaptive threshold, and corrects the tilt through the reference marker.

The data processing unit may further include an answer region extracting unit, and the answer region extracting unit may extract an answer region based on an outline connecting the reference markers in the corrected test land image.

The data processing unit may further include an answer scoring unit. If the answer scoring unit is a multiple-choice question, a binary value is calculated for each question in the extracted answer area, and a binary value is calculated based on the lowest binary value It can be recognized as a position marking position having a numerical value greater than or equal to a specific value and scored in comparison with the correct answer information stored in the database unit.

In addition, the data processing unit, which is an embodiment of the present invention, further includes an answer scoring unit. If the answer scoring unit is a question type or a narrative type, only the answer portion except for the problem portion can be provided to the scribe so as to be scored.

The present invention is a test strip recognition and scoring system that allows a user to easily recognize a test strip using a user terminal without a separate OMR reader or a scanner, and to quickly and accurately recognize the test strip. Also, the data processing enables the scoring to be performed quickly, accurately, A learning system can be provided.

More specifically, the reference marker in the test strip and the guideline for recognizing the same can be used to check the entire guideline area without checking the entire screen, so that it is possible to recognize at a high speed and to improve user convenience by automatically shooting .

In addition, it is possible to identify the correct position of the test paper through the reference marker, to identify whether the test paper is rotated, and to provide an easy and prompt recognition of the test paper by providing the role of extracting the answer position when extracting the inclination correction index and the answer area. .

In addition, in the case of multiple-choice questions, the minimum value for each problem is calculated separately without specifying the binary value recognized as the marking, check, and entry position in the answer area as an absolute value, so that the marking position or check position is relatively recognized. The reliability can be increased. In the case of a question about a supportive or narrative type, the grader can see only the answer except the problem, so that the readability is improved and the grading is easy.

In addition, learning data can be received from the user terminal, and the user can improve the learning efficiency by displaying the scoring result and the problem solving.

1 is a block diagram illustrating a test strip recognition and scoring system according to an embodiment of the present invention.
2 is an OMR card answer sheet according to an embodiment of the present invention.
FIG. 3 is a sheet or booklet-type test paper with a problem and an answer according to an embodiment of the present invention.
FIG. 4 is a sheet or booklet-type test paper with a problem and an answer according to an embodiment of the present invention.
5 is an image that can appear on the screen display unit when an application is executed according to an embodiment of the present invention.
6 is an automatic photographing algorithm of a recognition program of an application according to an embodiment of the present invention.
FIG. 7 is a conceptual diagram for determining whether all the reference markers are located on a guide line according to an embodiment of the present invention.
8 is an operational block diagram of a test strip recognition and scoring system according to an embodiment of the present invention.

Before describing the present invention in detail, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention, which is defined solely by the appended claims. shall. All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise stated.

Throughout this specification and claims, the word "comprise", "comprises", "comprising" means including a stated article, step or group of articles, and steps, , Step, or group of objects, or a group of steps.

On the contrary, the various embodiments of the present invention can be combined with any other embodiments as long as there is no clear counterpoint. Any feature that is specifically or advantageously indicated as being advantageous may be combined with any other feature or feature that is indicated as being preferred or advantageous. Hereinafter, embodiments of the present invention and effects thereof will be described with reference to the accompanying drawings.

The term " application " as used throughout this specification and claims means a set of programs for a set of terminals designed to perform a particular task and may also be expressed as an 'application' or 'application software' .

1 is a block diagram illustrating a test strip recognition and scoring system according to an embodiment of the present invention. 1, the test strip recognition and scoring system includes a test strip 10, a user terminal 20 and a management server 30. The user terminal 20 and the management server 30 are connected to each other via a wire / Lt; / RTI >

The user terminal 20 includes a photographing unit 21 and a screen display unit 22 and is a terminal on which the application 23 is installed and executed. The user terminal 20 is capable of scanning a test strip image and providing a user with a score analysis result and problem solving do.

The management server 30 is a server including a data processing unit 31 and a database unit 32. The management server 30 receives a test paper image recognized by the user terminal 20 and transmits learning data after data processing such as image correction, To the terminal (20).

The test papers 10 include not only OMR card answer sheets, but also sheet and book form problems and answer sheets integrated test sheets. FIG. 2 shows an OMR card answer sheet according to an embodiment of the present invention, and FIG. 3 and FIG. 4 show a single sheet or booklet-type test sheet with a problem and an answer.

As shown in Figs. 2 to 4, the test strip 10 includes an answer area 11 in which an answer of a user's problem can be described, and a reference marker 12 is located in a specific area of the test strip. Further, it may further include a rotation state identification means 13 as the case may be.

The answer area 11 may include a markable position as shown in FIG. 2, or may include a position where the answer can be checked in a multiple choice view, a position that can be described in a supporting style or a narrative style, as shown in FIGS. 3 and 4 .

The reference marker 12 is positioned at three or more of the corners of the test strip 10 and can function as a photographing index when the test strip is recognized through the user terminal 20, An area extraction function and an inclination correction index function can be performed.

The reference marker 12 may have a shape such as a polygon having a border of a certain thickness, for example, a square, but is not limited thereto. It may include any shape that can be recognized as a reference marker by a guideline .

The user terminal 20 includes a photographing unit 21 and a screen display unit 22 and is a terminal on which the application 23 is installed and executed. The user terminal 20 is capable of scanning a test strip image and providing a user with a score analysis result and problem solving do.

The photographing unit 21 includes an optical device such as a camera capable of photographing the test strip 10 and serves as a means for recognizing the test strip. And executes an automatic photographing instruction by the recognition program of the application 23. [

The screen display section 22 is an interface means for enabling a user to select and execute an application menu. In addition, when the test paper is recognized, the photographing condition may be displayed, or a score analysis result, a problem solution may be displayed. If the guideline is displayed when the shooting status is displayed, the status can be confirmed by the user, which can help increase the automatic shooting recognition rate. However, even if the guideline is not displayed, the guideline is generated internally so that it can be recognized automatically . FIG. 5 illustrates an image that may appear on the screen display unit when an application is executed.

The application 23 includes a recognition program capable of automatically scanning test papers and scanning images of the entire test papers. Fig. 6 shows an automatic photographing algorithm of the recognition program.

As shown in FIG. 6, the recognition program internally generates a guide line for grasping the position of the reference marker, and checks the guide line area every frame to determine the position of the reference marker. If the recognition condition is satisfied, And scan the test strip image. Since only the guideline area can be checked without checking the entire screen, it is possible to recognize at a high speed and it is possible to improve user convenience by automatically shooting.

The recognition condition for automatic photographing allows the photographing to be performed automatically only when the reference marker is recognized in three or more guidelines, so that the image of the entire test paper can be recognized at a high recognition rate. Preferably, the photographing is performed automatically when the reference marker is recognized in the four guide lines because the image of the whole test strip can be recognized without wrinkling or inclination.

If the reference marker is not recognized in more than one guideline, that is, if the test strip is wrinkled or tilted, the image is not captured, thereby preventing the scan of the incorrect test strip image, thereby reducing the burden on the image correction process And the reliability of the scoring result can be increased.

FIG. 7 is a conceptual diagram for determining whether all the reference markers are located on the guideline. As shown in Fig. 7, the guideline recognizes the border area of the reference marker as 1 and recognizes the other area as 0, and recognizes the shape of 010 and 01010 on the straight line in two or more straight lines having a certain interval Is recognized as a fiducial marker. In the case of using such a method, it is possible to recognize even when the reference marker is rotated.

Also, a method of recognizing the reference marker by checking the entire screen display section 22 of the user terminal 20 can be used. This is because a guideline is formed on the entire screen display unit 22 and three or four reference markers are automatically photographed, so that the entire screen must be checked rather than a guideline is formed in a part of the guiding line, There is a merit that the user does not need to align the position of the reference marker.

Even if the test strip is photographed by the user's terminal without using a separate device such as a reader or a scanner through three or more reference markers located at the corners of the test strip 10 and a guide line for recognizing the same, It is possible to minimize the wrinkles and tilts and to recognize them, thereby increasing the recognition rate of test strips and obtaining accurate images. As a result, it is possible to reduce the processing burden of the image correction and the answer area extracting unit in later data processing, thereby enabling quick and accurate scoring.

When the fiducial markers 12 are located at three of the corners of the test strip 10, if the fiducial markers 12 are recognized only in the three guideline regions, rapid scanning is possible, and the rotation of the scanned test strip image There is an advantage to know whether or not. However, there is a disadvantage in that it is difficult to precisely locate the remaining edge where the reference marker is not located due to the characteristics of the test paper 10 made of paper which can be easily deformed.

Therefore, it is preferable that the reference markers 12 are located at four of the corners of the test strip 10 so that the exact position of the test strip 10 can be grasped. In this case, By including in the test strip 10 the rotation presence / absence identification means 13 such as a QR code, a triangular marker, and the like.

Further, the user terminal 20 may further include a gyro sensor to help maintain the level of the automatic test strip, and may further include an illuminance sensor so that the user can take a picture even in a dark environment.

The test paper image recognized by the user terminal 20 is transmitted to the management server 30 through the wired / wireless communication network. The management server 30 is a server including a data processing unit 31 and a database unit 32. The server 30 receives a test paper image and analyzes the image after processing data such as an image correction, an answer area extraction, an answer scoring, ) To the user terminal (20).

The user terminal 20 may be a personal computer (PC), a smart terminal, a PDA, or the like, but is not limited thereto.

The data processing unit 31 includes an image correction unit 311, an answer area extracting unit 312, and an answer scoring unit 313.

The image correcting unit 311 removes the noise of the test image transmitted from the user terminal 20 through the image binarization (adaptive threshold), and corrects the tilt through the reference marker in the test image.

The answer area extracting unit 312 extracts the answer area based on the outline connecting the reference markers in the corrected test paper image.

In the case of a multiple choice question, the answer scoring unit 313 calculates a binary value for each question in the extracted answer area and sets an area having a numerical value greater than a specific value based on the lowest value having the largest empty space as a marking position or a check position And compares it with the correct answer information stored in the database unit 32 to score.

The problem image corresponding to the extracted answer area is binarized and stored in the database, and the corresponding problem can be identified by comparing with the captured image. Therefore, not only the text of the problem but also the image of the problem can be used to identify the problem, and the score is compared with the correct information stored in the database.

It is possible to increase the reliability of the scoring result by calculating the minimum value for each problem and recognizing the marking position or the check position relatively without designating the binary value recognized as the marking, check, and the position of the answer area as an absolute value.

If the question is a question or answer question, only the part of the answer except the problem part is given to the scorer and scored. The scorer can see only the answer except for the problem, and it is easy to score because the readability is high. You can also provide answers from multiple users at the same time, and you can quickly score your answers by providing the answers and answers on a single screen. Analysis results such as wrong answer rate and wrong answer type are analyzed.

The database unit 32 may include a problem database, a scoring information database, and an incorrect answer database, and stores various learning materials such as problem information, correct answer information, interpretation information, and score analysis result information. The learning data is transmitted to the user terminal 20 through the wired / wireless communication network.

The problem database is a database of problem information such as correct answers and annotation information about the problems and problems delivered by the problem creator or the problem bank. That is to say, the problems presented can be databaseized for each learning area and the learning difficulty, and the problems can be selected and arranged according to the needs of the test applicants and applicants.

The scoring information database stores scoring information such as noon (correct answer or wrong answer) information about the answers delivered through the data processing unit, and information on the addition of incorrect answers.

The wrong answer database receives the scoring information from the scoring information database and stores the incorrect information such as the error rate, the incorrect type, and the incorrect description. In other words, the data is constructed according to the candidate, the problem, and the type of wrong answer, and systematically provides the test questions for the next time and the notes for the wrong answers to the learners.

The user terminal 20 can receive the learning data and display the grading result and the problem solving, thereby improving the learning efficiency of the user.

According to the present invention, a test paper can be recognized easily, quickly, and accurately by using a user terminal without a separate OMR reader or a scanner, and scoring can be performed quickly and precisely through data processing.

FIG. 8 shows an operation block diagram of a test strip recognition and scoring system according to an embodiment of the present invention.

As shown in FIG. 8, the administrator places a fiducial marker having a photographing index function in a specific area, and provides the user (candidate) with a test sheet including the answer area. The administrator also provides an application that includes a recognition program that automatically scans a test strip image when the reference markers are all located on a guideline using a guideline to recognize the reference markers.

The user creates an answer (marking, check, description, etc.) of the provided test sheet and installs and executes the application provided by the administrator through the user terminal. By executing the test paper recognition program of the application and adjusting the position and the horizontal state of the test paper while checking the photographing state displayed on the screen display section, the photographing section automatically performs photographing by the automatic photographing algorithm to scan the test paper image.

The test paper image is transmitted to the management server, and is subjected to image correction, answer area extraction, and grading processing through the data processing unit and the database unit, and the learning data such as the score analysis result and the problem solution are transmitted to the user terminal .

The features, structures, effects, and the like illustrated in the above-described embodiments can be combined and modified in other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

10: Test paper
11: Answer area 12: Reference marker 13:
20: User terminal
21: photographing section 22: screen display section 23: application
30: Management server
31: data processing unit 32:

Claims (10)

A test strip on which a reference marker having a photographing index function is located in a specific area and which includes an answer area;
A recognition program capable of internally generating a guide line for grasping the position of the fiducial marker and automatically scanning the test papers when the recognition condition is satisfied by grasping the position of the fiducial markers, A user terminal in which an application including an application is installed and executed; And
And a management server including a data processing unit and a database unit,
Wherein the user terminal and the management server are capable of transmitting test images and learning data through a wired / wireless communication network. The method according to claim 1,
Wherein the reference marker is a polygon having a border of a certain thickness and located at three or four of the corners of the test strip. 3. The method of claim 2,
The guide line is defined as two or more straight lines having a predetermined interval, and the border area is recognized as 1, and the other areas are recognized as 0, and only those recognized as 010 and 01010 on the straight line of the guide line, Markers are recognized,
Wherein the recognition condition is adapted to automatically capture only when a fiducial marker is recognized in three or more guidelines. The method of claim 3,
Wherein the test strip further comprises rotation identification means when the fiducial markers are located at four of the corners of the test strip. 5. The method according to any one of claims 1 to 4,
The user terminal further includes a screen display unit,
Wherein the screen display unit displays the guide line to confirm the photographing state. 5. The method according to any one of claims 1 to 4,
The test strip is a test strip recognition and scoring system that includes an OMR card answer sheet, a sheet or book form problem, and an integrated test strip. 5. The method according to any one of claims 1 to 4,
Wherein the data processing unit includes an image correction unit,
Wherein the image correction unit removes noise of the transmitted test strip image through an image binarization and corrects the tilt through the reference marker. 8. The method of claim 7,
Wherein the data processing unit further includes an answer area extracting unit,
Wherein the answer region extraction unit extracts an answer region based on an outline connecting the reference markers in the corrected test strip image. 8. The method of claim 7,
Wherein the data processing unit further includes an answer scoring unit,
The answer scoring unit may calculate a binary value for each problem in the extracted answer area and recognize the position as a position marking position having a numerical value greater than or equal to a specific value based on a position where the binary value is the lowest, And the score information is compared with the correct answer information stored in the test score storage unit. 8. The method of claim 7,
Wherein the data processing unit further includes an answer scoring unit,
Wherein the answer scoring unit is provided with a scoring unit that scans only the portion of the answer except for the problem portion in the case of a question related to the questioning or narrative type.

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