KR20150099906A - Method for grading paper automatically - Google Patents

Abstract

Disclosed is a method for grading a paper automatically. According to an aspect of the present invention, in a method for grading a paper by using a mobile phone, a method for grading a paper includes: a step of obtaining an image of an answer region by photographing an answer sheet; a step of grading the answer sheet in the image of the answer region based on the answer information corresponding to the paper; and a step of displaying the grading result on the screen of the mobile phone.

Description

{METHOD FOR GRADING PAPER AUTOMATICALLY}

The present invention relates to an automatic scoring method, and more particularly, to a method for automatically scoring an answer sheet on the fly after problem solving.

Techniques for automatically scoring an answer sheet include using an OMR card and scoring an answer sheet based on the positional coordinates of the answer after scanning it with a scanner.

To use the OMR card scoring method, the OMR card reader and the OMR card provided to the answer writer must be provided, and the OMR card to which the answer is written should be moved to the place where the reader is installed. Thus, while this method is useful for collectively scoring a large volume of answer sheets for the same questionnaire, it is not suitable for use for instant scoring after solving problems (on the move) in various mobile environments .

On the other hand, in the case of directly writing an answer on a question paper made of a book, there is a problem that it is difficult to automatically score by the above-mentioned conventional method.

According to an aspect of the present invention, there is provided a method of automatically scoring an answer sheet having a problem solving function on the fly, checking results thereof, We want to provide an effective way to do this.

According to an aspect of the present invention, there is provided an image processing apparatus including a processor, a storage unit, a wireless communication unit, and an image acquisition unit, A first step of moving the mobile portable terminal to the answer sheet to acquire an image of the answer area, the method comprising the steps of: A second step of scoring an answer sheet in the image of the answer area based on correct answer information corresponding to the question sheet; And displaying the scoring result on a screen of the portable terminal, wherein the first to third steps can be performed in one portable terminal.

The first step may be to photograph an answer area when an answer area including a predetermined boundary mark is captured and obtain an image within the boundary mark. The second step is a step of acquiring correct answer information corresponding to the questionnaire from a server or a repository of the portable terminal and comparing the position coordinates of the correct answers included in the correct answer information and the coordinates of the answers indicated in the image of the obtained answer area with May be performed by comparison. The first step may be to capture boundary display barcodes indicating the boundaries of the answer area and obtain an image of the answer area within the boundary mark. The scoring may include recognizing an answer displayed in the obtained answer area as a bar code and scoring the answer. The scoring method may further include providing the requested additional information when a signal for requesting additional information on the scoring result is input from a user after displaying the scoring result. The additional information may include a description of the problem selected by the user, a video lecture, or a solution of a wrong answer. The scoring method may include acquiring the answer information by recognizing an answer displayed in the answer area as a bar code. The scoring method may include the step of correcting the image of the answer area obtained by photographing the answer sheet based on the interval of the reference scale provided in the questionnaire.

According to an aspect of the present invention, there is provided a method of scoring answer sheets for a specific questionnaire performed using a mobile terminal, the method comprising: positioning the mobile terminal on the answer sheet; A first step of acquiring an image; A second step of scoring an answer sheet in the image of the answer area based on correct answer information corresponding to the question sheet; And a third step of displaying the scoring result on a screen of the portable terminal, wherein the first to third steps can be performed in one portable terminal. Provide a possible medium.

According to an aspect of the present invention, there is provided a method of scoring answer sheets for a specific questionnaire performed using a mobile terminal, the method comprising: positioning the mobile terminal on the answer sheet; A first step of acquiring an image; A second step of scoring an answer sheet in the image of the answer area based on correct answer information corresponding to the question sheet; And a third step of displaying the scoring result on the screen of the portable terminal, wherein the first to third steps can be performed in one portable terminal, .

Using the automatic scoring method according to an embodiment of the present invention as described above, a user can directly write an answer to a problem book or a reference book, and then take an answer by using a mobile phone itself such as a smart phone, By using the correct answer information for the questionnaire and displaying the result, it is possible to carry a separate additional hardware device in various mobile environments, for example in a train running, in a library, or at a friend's house The automatic scoring can be performed quickly and easily. In addition, it is possible to provide a more efficient learning effect by allowing a user to view a wrong solution, a video lecture, etc. through the terminal.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a diagram illustrating an automatic answer scoring process using a mobile terminal according to an embodiment of the present invention; FIG.
1B is a flowchart showing an answer scoring process according to an embodiment of the present invention.
FIG. 2 is a view showing an example in which a boundary of an answer area is displayed in part of a question paper according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating an example of barcode display of an answer area according to an embodiment of the present invention.
FIG. 4 is a view showing an example in which an answer area is displayed on the entire questionnaire according to another embodiment of the present invention.
5 is a diagram illustrating an example of displaying a scoring result according to another embodiment of the present invention on a screen of a terminal.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Referring to FIG. 1A, according to an embodiment of the present invention, a mobile portable terminal 100 such as a smart phone or a tablet PC, which always carries an answer sheet, The mobile terminal 100 acquires an image of the answer sheet, automatically scans it, and displays the result on the mobile terminal 100 instantaneously. The mobile terminal 100 may include a wireless communication unit (unidirectional or bidirectional) for wireless communication, a processor, and an image acquisition unit (e.g., camera) for image capture. In addition, the mobile terminal 100 may include a storage unit (or a storage unit) for storing various programs and data, and may include a DRAM. In the present invention, the mobile mobile terminal 100 is moved to the problem book 200 by moving the portable mobile terminal 100 in a horizontal state, for example, Can be placed on the workbook 200 in an upright position. That is, any position capable of acquiring an image of the answer book (200). More specifically, the process of acquiring the image may be, for example, photographing an image with a camera provided in a mobile terminal, and acquiring an image of the barcode, for example.

1B is a flowchart showing an answer scoring process according to an embodiment of the present invention. The answer scoring process according to an exemplary embodiment of the present invention includes an answer sheet photographing step S110, an image acquiring step S120, a correct answer information acquiring step S130, an answer scoring step S140, a scoring result providing step S150, An explanation providing step S160 and a moving picture lecture providing step S170.

Referring to FIG. 1B, each step of the answer scoring process according to an embodiment of the present invention can be described as follows.

The answer sheet photographing step S110 is a step of photographing an answer using a mobile terminal (for example, a smart phone, a mobile phone, a tablet PC, or the like) of a user who has made an answer to a question sheet. At this time, the answer sheet is not limited to the answer sheet separate from the question sheet, but may include an answer sheet area provided in a certain area in the question sheet or an answer sheet area provided for each question in the question sheet. The answer sheets according to the present invention can include all the areas in which answers can be described, and are not limited by the present embodiment. More specifically, after moving the mobile terminal (hereinafter referred to as "portable terminal" or "terminal") to a position of the answer area of the question paper, I shoot.

The image acquiring step (S120) is a step of acquiring an image of the answer area in the answer sheet together with the shooting of the answer sheet. At this time, the answer area may be determined by a predetermined boundary marking or by a bar code

For example, if there is an indication line for displaying the boundary of the answer area on a part of the question paper or on a separate answer sheet, the area within the indication line may be the answer area, I will write. In this case, the image within the corresponding display line can be obtained as an image of the answer area.

As another example, when a boundary display bar code is provided to display the answer area on a part of the question paper or on a separate answer sheet, the area within the boundary display bar code can be obtained as an image of the answer area.

As another example, if the answer area is provided for each item in the question paper, that is, the question paper provided so as to mark the answer around the question while reading the question, the entire question paper can be acquired as the answer area image . In this case, there may exist a landmark line representing the boundary of the question paper. The image within the boundary line can be obtained as an image of the answer area.

The image may be a two-dimensional image or a one-dimensional image (e.g., a bar code), and the user may extract the answer information based on the image information (e.g., the location information of the answer indicated in the image). In other words, it is possible to determine how many times the user has indicated the answer for each question.

Next, the correct answer information obtaining step (S130) may be a step of obtaining correct answer information for each question on the question paper. At this time, the user inputs the question mark identification information (for example, a questionnaire unique number, a publisher, a subject, etc.) through the terminal in advance, or scans (photographs) the bar code or QR code provided in the question book, And receives the correct answer information corresponding to the question paper from the server or recalls it from the storage (or storage) of the terminal. The storage may be a volatile or nonvolatile memory, as well as a DRAM. Or the boundary display barcode indicated in the answer can be read to obtain the correct answer information corresponding to the question paper.

As described above, it is possible to obtain the correct answer information corresponding to the question paper based on the information obtained from the image of the answer area obtained by photographing the answer.

Correct answer information may vary depending on the form in which the answer area is provided, for example, an image of the correct answer corresponding to the image of the answer area may be provided, or a correct answer may be provided for each item.

The answer scoring step S140 may be a step of scoring an answer in the image of the answer area based on the correct answer information obtained in the correct answer information obtaining step S130. At this time, the score can be scored by comparing the image of the correct answer included in the correct answer information with the image of the obtained answer area, and the score can be performed by comparing the position coordinates of the answer indicated in the answer area with the position coordinates of the correct answer corresponding thereto have.

Alternatively, in the case of an answer area indicated by a bar code, the answers displayed in the answer area may be recognized as bar codes and scored by comparing them with the correct answer information per item included in the correct answer information.

The step of providing the grading result (S150) is a step of displaying the answer sheet grading result performed in the answer grading step (S140) on the screen of the terminal, and the erroneous chart may be displayed for each item. In addition, a function to select a problem pool or a video lecture can be provided for each question.

In the case where the scoring result is requested by the user on the screen, the user requests additional information such as a request for a solution to a specific problem, a request for a solution of a wrong answer, a video lecture, or the like It may be a step of displaying a corresponding screen. In this case, the information corresponding to the request of the user can be downloaded from the server or the information stored in the terminal can be read.

The various steps of the automatic scoring may be performed directly by one mobile terminal. Further, a variation (for example, an indirect answer) is sent to a central server through a communication network such as the Internet to obtain a solution area image (or information processed by the portable terminal) It is possible.

Hereinafter, the scoring method according to one embodiment of the present invention will be described in more detail with reference to the drawings for each answer sheet type.

FIG. 2 is a view showing an example in which a boundary of an answer area is displayed in part of a question paper according to an embodiment of the present invention.

Referring to FIG. 2, the user can display an answer area 210 on the lower right of the question paper and display an answer. At this time, in the answer area, there is a display "211" indicating the boundary of the answer area, and a page is displayed at the upper part.

After preparing an answer in the answer area, the user operates an application for scoring according to an embodiment of the present invention installed in the smartphone to score the answer, and inputs the question name and information to prepare for scoring.

At the time of photographing, the boundary display 211 is recognized, and at the moment when the boundary mark 211 is located at a certain position, or when the boundary mark 211 is displayed on the camera And can be configured to be photographed when all of them are caught in focus. In addition, the photographed image is used for scoring by acquiring only the image within the boundary mark 211. [

In addition, the number of pages at the top of the question paper can be recognized and information of the correct answer information of the page (for example, the correct answer image or position coordinates) can be obtained from the storage unit or downloaded from the server. Using the obtained correct answer information, the score is compared by comparing the position coordinates of the answer with the position coordinates of the correct answer. At this time, the image may be deformed according to the intrinsic characteristics of the camera lens or the photographing angle at the time of photographing, but the correction for such deformation can also be performed by the prior art.

FIG. 3 is a diagram illustrating an example of barcode display of an answer area according to an embodiment of the present invention.

Referring to FIG. 3, the answer display itself of the answer area 300 of the present embodiment can be recognized as a bar code. At the upper and lower ends of the answer area, a first bar code 320 and a second bar code 330 are provided as boundary display bar codes serving as position reference lines in reading bar codes. When the user activates an automatic scoring application that utilizes the bar code of the smartphone using the scoring method according to the present invention after displaying the answer, the bar code can be read. In the touch screen, the first bar code 320, The second bar code 330 and the bar code reading line 360 for reading the answer display can be displayed.

Basic information on the book name, the number of pages, and the like can be recorded in the boundary display bar codes 320 and 330, and can guide the camera of the smart phone to the correct position. For example, when a user approaches a smartphone for answering, a barcode reading line for the first barcode 320 among the plurality of barcode reading lines 360 displayed on the touch screen is displayed on the first barcode 320, It is possible to capture a moment when the smart phone automatically recognizes the up and down bar codes (the first bar code and the second bar code), thereby recognizing the entire bar code including the answer.

The answer display is indicated by a bar and recognized as a bar code. A different signal can be input depending on the distance from the reference line indicating the starting point. At this time, depending on the deviation of the answer notation for each user, the answer may be written with different thickness, so that it can not be deciphered by other information depending on the thickness. It can also be configured to decode according to the distance for item scoring. Or the item number, so that the answer display position according to the item number can be deciphered. In order to prevent errors, the starting point 340 and the ending point 350 may be configured in a special form.

Therefore, if all of the barcodes including the answer display are recognized, information on the correct answer of the corresponding page in the storage unit based on the name of the book (corresponding) and page information derived from the information stored in the boundary display barcode 320, 330 And the automatic scoring is performed on the basis thereof.

As described above, by using the mobile portable terminal as a barcode reader (reader), the answer display itself is recognized as a barcode, and the barcode is decoded so that quick scoring is possible. Since the barcode can be read based on the thickness and the position information of the line on the one-dimensional straight line without the need for a two-dimensional image analysis, the operation is relatively simple and it is possible to implement the barcode without having high resolution of the camera or performance of the processor of the terminal. It is also possible to obtain answer information quickly even when using a low-end type terminal. In addition, it is possible to reduce errors due to distortion that may occur in the two-dimensional image acquisition and recognition.

FIG. 4 is a view showing an example of displaying an answer area in the entire questionnaire according to an embodiment of the present invention.

Referring to Fig. 4, in the scoring of the questionnaire bound to a book such as a question book, a reference book, and the like, the question paper of the left page is shown from the two left and right pages when the book is opened. In the question paper, since the answer area for answer display is not separately provided, the entire question paper can be photographed and scored. At this time, a plurality of reference graduations of the same interval may be displayed on the upper and lower sides of the question paper. In the case of a book collection of books, unlike a sheet of question paper, it can have a convex curve form. Therefore, the positional information is distorted at the time of scoring and difficulty occurs in scoring. Therefore, it is possible to configure scoring after correction.

4, an image can be obtained by recognizing reference graduations 410 and 420 indicating boundaries as in the example of FIG. At this time, the reference graduations 410 and 420 are irregularly arranged according to the curved shape of the paper, and in particular, the shape of the graduations is narrowed toward the portion where the book is folded (the middle portion where the right and left pages meet). An operation for correcting this can be performed.

In general, the ratio of the total transverse length B 'and the longitudinal length A' of the reference scale 410 or 420 on the plain paper is a constant (B '/ A'). The vertical length is a distance between the reference scales 410 and 420 provided on the upper and lower sides of the page or a length obtained by adding the height of the reference scales to the distance. Therefore, the length of the corrected lateral length B can be obtained by multiplying the photographed longitudinal length A by a constant. Subsequently, B is divided by the number of reference graduation intervals (the number of reference graduations - 1) and designates it as d.

d = B / (n-1)

Then, if each interval is d1, d2, ,,, d20, the image can be corrected by extending horizontally so that the interval becomes d. For example, in the case of a rectangle surrounded by d9 and c9, if d9 is 0.5 cm and d is 1 cm, the image is corrected in such a manner that the width of the area rectangle is doubled laterally. For more accurate calibration, you can calibrate the upper and lower scale intervals separately and connect them to the vertical dotted line. Performing this operation on all the scale intervals results in a desired corrected image. After that, according to the correct position coordinate information stored in the storage unit, scoring is performed based on the position coordinates of the answer as in the example of FIG.

In other words, in the case of the present embodiment, the step of marking the answers of the questionnaire using the mobile terminal includes a step of correcting the images of the answer area based on the intervals of the reference marks provided in the questionnaire.

As described with reference to FIG. 4, it is possible to quickly and easily perform automatic grading by photographing and taking an image after an answer is displayed on a question book in a conventional manner without needing to prepare an answer area separately. In this case, the answer area need not always be a separate area separated from the remaining area, but may be the entire questionnaire. This method is suitable for a terminal having a high specification such as a high-resolution camera.

5 is a diagram illustrating an example of displaying a scoring result according to another embodiment of the present invention on a screen of a terminal.

Referring to FIG. 5, a scoring result may be displayed on a touch screen of a smartphone. At this time, a wrong anomaly list is displayed on the screen, and an interface for allowing the student to select additional information desired can be provided. That is, the touch screen can serve both as a display unit and as an input unit.

For example, if the entire description 510 is selected, a description of all the items is displayed, and if the incorrect description 520 is selected, a description of the wrong item can be displayed. In addition, if the explanation display icon 530 provided for each question is selected, a description of the selected question is displayed, and if the user selects the video lecture icon 540, the moving picture related to the question can be displayed.

As described above, according to an embodiment of the present invention, the answer sheet is scored using the mobile portable terminal, the mobile portable terminal is moved to the answer area in which the answer is recorded, A second step of scoring an answer sheet in the image of the answer area based on the correct answer information corresponding to the questionnaire, and a third step of displaying the scoring result on the screen of the mobile handset And can be performed in one mobile terminal.

In the present invention, the terminal may be various mobile terminals such as a mobile phone, a smart phone, and a tablet PC. In addition, the problem paper is not necessarily limited to a separate sheet of paper, but may be a problem sheet bound with various reference books and problem books. Also, as described above, the photographing is not necessarily limited to the photographing by the photographing function, and it may be to recognize the barcode by utilizing the barcode reading application. Also, the answer area is not necessarily limited to the form in which the boundary is clearly visible, and can be any area in which the answer can be displayed. The problem sheet shown in FIGS. 2 to 4 is an arbitrary problem sheet for illustrating the technical idea of the present invention, and is not a specific problem sheet exactly matching the answer sheet. In the case of FIG. 3, an example is shown in which upper and lower border bar codes are provided. However, the present invention is not limited to the embodiment having the border bar code. In addition, the work performed by the terminal for the automatic scoring of the present invention can be collectively controlled by a control unit provided in the terminal. The control unit may include a processor such as an application processor. According to an aspect of the present invention, there is no need to move to a place where a separate reading device such as an OMR card reader is installed by automatically scoring an answer that is solved on a problem floor using a mobile terminal, You can do automatic scoring immediately on the spot where you have solved the problem. In addition, the result can be immediately confirmed immediately on the mobile terminal through the mobile terminal, and the wrong information and the related material or video lecture can be immediately confirmed on the spot where the problem is solved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

Claims (12)

A computer-readable recording medium having a processor, a wireless communication unit, a storage unit, and an image obtaining unit, which can move a position and acquire a specific region image at a desired position by a user, In the method,
A first step of moving the mobile terminal to the answer sheet to obtain an image of an answer area;
A second step of extracting answer information indicated by a problem solver on the answer sheet based on the information of the image;
A third step of scoring an answer sheet in the image of the answer area on the basis of correct answer information corresponding to the question sheet; And
And displaying the scoring result on a screen of the mobile terminal. 2. The method according to claim 1,
Capturing an answer area when an answer area including a predetermined boundary mark is captured, and obtaining an image within the boundary mark. 2. The method of claim 1,
By comparing the positional coordinates of the correct answers included in the correct answer information with the positional coordinates of the answers indicated in the image of the obtained answer area, by obtaining the correct answer information corresponding to the questionnaire from the server or the repository of the portable terminal, . 2. The method according to claim 1,
Capturing boundary display bar codes indicative of boundaries of the answer area, and obtaining an image of the answer area within the boundary mark. The method according to claim 1,
Wherein the answer is recognized as a barcode and the answer is scored. The method according to any one of claims 1 to 5,
After the step of displaying the scoring result,
Further comprising the step of providing the requested additional information when a signal for requesting additional information on the scoring result is inputted from the user. The method of claim 6,
Wherein the additional information includes a description of a problem selected by the user, a video lecture, or a solution of a wrong answer. The method according to claim 1,
Recognizing an answer displayed in the answer area as a bar code, and decoding the bar code to obtain answer information. The method according to claim 1,
And correcting the image of the answer area obtained by photographing the answer sheet based on the interval of the reference marks provided in the questionnaire. The method according to claim 1, wherein the first to fourth steps are directly performed in one mobile terminal. A program for executing a method according to any one of claims 1 to 5 or claim 6 to 10 is recorded. A portable terminal in which a program for executing the method according to any one of claims 1 to 5 or claims 6 to 10 is carried out.

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