CN114723931A

CN114723931A - Portable test paper scoring miniature scanning pen

Info

Publication number: CN114723931A
Application number: CN202210444456.1A
Authority: CN
Inventors: 方铭杰; 闫琰; 刘伟国
Original assignee: Northwest A&F University
Current assignee: Northwest A&F University
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-07-08

Abstract

The invention discloses a portable test paper scoring miniature scanning pen, which belongs to the technical field of test paper scoring and comprises a pen body, wherein an optical scanning head is arranged at the end of the pen body to scan a test paper filling area; the optical scanning head is internally provided with an image sensor to obtain image information of a test paper marking identification area, the image sensor is connected with a micro processor, the micro processor aligns the image information with coordinates of a filling pattern template image, obtains position information of image information positioning mark points according to the positioning mark point coordinates of the template image, obtains digit and numerical value information of the image information and assigns values to obtain single-question scores, and collects the test paper scores after scanning all questions in sequence. The scanning pen can reduce the workload of teacher counting score and improve the examination paper correcting efficiency.

Description

Portable test paper score miniature scanning pen

Technical Field

The invention belongs to the technical field of test paper scoring, and particularly relates to a portable miniature scanning pen for test paper scoring.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

At present, non-large-scale organization type examinations such as final exam marking in colleges and universities and primary schools ordinary class tests use a traditional examination marking mode, namely, a teacher needs to manually perform correction, point assignment and accounting of point and total points, the workload is large, the efficiency is low, and especially the difficulty of examination marking of the teacher is further increased due to the complicated question quantity and high error rate of a score accounting link.

The inventor finds that the online examination paper reading mode of modern examinations is perfect and popular, but the requirements of examinations or non-online examination paper reading batch of the individual organization of a large number of teachers are difficult to meet due to higher cost (such as answer sheets made of double-sided adhesive paper, expensive high-speed scanners and the like). Meanwhile, advanced portable learning scanners, intelligent translation pens and the like are available in the market, but the functions are unique, high-accuracy Optical Character Recognition (OCR) technology is often needed, the cost is increased, the selling price is quite high, and the requirements of teachers are difficult to meet.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the portable test paper scoring miniature scanning pen, which can reduce the workload of teachers for calculating scores, improve the test paper correcting efficiency and reduce the error rate of test paper correcting.

In order to achieve the purpose, the invention is realized by the following technical scheme:

in a first aspect, the invention provides a portable test paper scoring miniature scanning pen, which comprises a pen body, wherein an optical scanning head is arranged at the end head of the pen body to scan a test paper filling area; the optical scanning head is internally provided with an image sensor to obtain image information of a test paper marking identification area, the image sensor is connected with a micro processor, the micro processor aligns the image information with the coordinates of a filling pattern template image, obtains the position information of an image information positioning mark point according to the positioning mark point coordinates of the template image, obtains the digit and numerical value information of the image information and assigns values to obtain a single-question score, and collects the single-question score after completing scanning all questions in sequence to obtain the test paper score.

As a further technical scheme, the scoring identification area is provided with scoring numbers of unit digits and tens digits, and the microprocessor identifies scoring positions and digital information in the image information.

As a further technical scheme, the microprocessor compares the single-question score with a score threshold value, and prompts error information if the single-question score is larger than the score threshold value.

As a further technical scheme, when error information prompt occurs, the modified filling information can be scanned again, and the micro-processor sets the color of the image information identified by multiple scanning to be different.

As a further technical solution, after the optical scanning head identifies the question types, it is determined whether the number of the identification codes reaches the set number according to the set number information of the question types, so as to determine whether the question is missed.

As a further technical scheme, the micro processor checks the score accuracy condition of the large questions through the identification and addition operation of the scores of the small questions in the large questions.

As a further technical solution, the microprocessor performs binarization processing on the acquired image based on an image binarization technique.

As a further technical scheme, the microprocessor is connected with the electronic equipment, the image sensor identifies the number information of the test paper, and the microprocessor generates a table according to the corresponding test paper score and the number information and transmits the table to the electronic equipment.

As a further technical scheme, different test question modules are stored in the microprocessor, and the test question modules have different question type combinations and score threshold values.

As a further technical scheme, a switch button for controlling the scanning start is arranged in the middle of the pen body.

The beneficial effects of the invention are as follows:

the scanning pen of the invention obtains the scoring image information of the test paper through the optical scanning head, the microprocessor compares the image information with the template image to obtain the corresponding digit and numerical value of the image information, thereby calculating the score of a single subject, after the scanning of all the subjects is completed, the obtained scores are added to obtain the score of the current test paper, the scoring and checking processes are not manually operated by teachers, the workload of the teachers for checking the scores can be reduced, the test paper correction efficiency is improved, and the error rate is reduced.

The scanning pen can obtain corresponding scores according to the comparison between the image information and the template image after only scanning the image, does not need to use a high-accuracy Optical Character Recognition (OCR) technology, only needs to carry out image scanning and image processing, and reduces a large amount of development and manufacturing cost.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic diagram of a wand according to one or more embodiments of the present invention;

FIG. 2 is a schematic workflow diagram of a wand according to one or more embodiments of the present invention;

FIG. 3 is a schematic illustration of a fill-in pattern scanning conceptual pattern in accordance with one or more embodiments of the invention;

FIG. 4 is a schematic diagram of a system architecture for a wand-coupled handset device in accordance with one or more embodiments of the present invention;

FIG. 5 is a diagram of a mode of small-point additive accounting with filling in of large topics in accordance with one or more embodiments of the present disclosure;

in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;

wherein, 1 handwriting, 2 optical scanning head, 3 switch buttons, 4 bluetooth switches.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

In a typical embodiment of the present invention, as shown in fig. 1, a portable test paper scoring miniature scanning pen is provided, which can be held by a user for scanning and scoring test paper, so as to reduce the workload of teacher reading test paper.

Structurally, the scanning pen comprises a pen body 1, wherein an optical scanning head 2 is arranged at the end of the pen body 1, a switch button 3 for controlling scanning starting is arranged in the middle of the pen body 1, and a Bluetooth switch 4 is further arranged on the pen body 1 to be connected with electronic equipment such as a mobile phone.

The optical scanning head 2 is used for scanning the specified filling area of the test paper, and adopts a high-quality image acquisition (such as text image binary mixing) technology, and adopts an area array image sensor and a special microprocessor with an image data interface to process and input the image content obtained by scanning.

The switch button 3 is used for starting or closing the scanning pen, and can be connected with a power supply and the like for supplying power to the optical scanning head so as to control whether the scanning pen works or not; the switch button may be implemented by the prior art, and is not described herein again.

Electronic equipment such as a mobile phone is used for checking the scanning result and selecting and processing information. The electronic equipment is connected with the scanning pen through the Bluetooth, scanned image information and the like are transmitted to the electronic equipment, and different functional modules are displayed on a screen of the mobile phone after the Bluetooth is connected.

The electronic device can be other devices such as a tablet and a notebook which can display images and view information results, and the connection mode of the electronic device and the scanning pen can also be other devices such as wifi connection.

An image sensor is arranged in the optical scanning head to scan and obtain images, the image sensor transmits image information to a micro processor, the micro processor is connected with a mobile phone processor through Bluetooth, and the micro processor processes and calculates the image information collected by the image sensor to obtain the scores of the scanned question types.

The mobile phone end can input the names of the students according to the numbers, the final result of scanning and scoring is matched with the names and the numbers of the students on the mobile phone, and a table is automatically generated, so that the teacher can conveniently check the table.

In the present embodiment, the image sensor may employ an area array sensor to obtain a high-quality image.

The microprocessor of the scanning pen stores different test question modules which can be visually expressed as modes, namely, each mode has different question types, after the question type of the current test question is determined, one mode can be selected to operate, and the image is scanned and the score is calculated.

The question type of each mode can be set according to needs, the mode type is input, for example, a teacher can select a corresponding question type according to the structure of the test paper and input the question type into the corresponding mode, such as a selection question, a judgment question, a blank filling question, a brief answer question, a discussion question and the like. After different question types are selected, the teacher can set the score of the test question module according to the score standard of the test paper. After the setting is finished, the test paper can be stored in a mode, and the filling styles of different question types of the test paper are shown in figure 5.

Through the operation, after the scanning pen Bluetooth switch is connected with the mobile phone, a teacher edits the question type and sets the score threshold value of each major question and each minor question at the mobile phone end according to the test paper question setting scheme and stores the score threshold values in the mode plate.

And the scanning pen displays the scanning result on a display screen of the mobile phone according to the question type object scanned during operation.

The specific working mode of the scanning pen for scanning, score counting and score checking is as follows:

after a teacher corrects the test paper manually, filling scores in a scoring identification area (shown in figure 3) of each question of the test paper, setting scoring numbers (0-9 respectively) of the unit number and the tens number in the scoring identification area, and filling corresponding numbers in the unit number and the tens number respectively after the teacher reads the test paper;

an optical scanning head of the scanning pen is provided with a light source by an LED white light diode, irradiates the surface of a test paper filling area, generates diffuse reflection light, focuses the diffuse reflection light on an area array image sensor through a lens, generates a scanning image with the resolution of 128 x 80 pixels, and a microprocessor performs binarization processing on the acquired image based on an image binarization technology;

based on a template matching method, a binarized teacher fill-in image is aligned with a fill-in image scanning concept pattern image (i.e., a fill-in pattern template image) in a coordinate mode, position information of a positioning mark point in the teacher fill-in image is obtained according to the positioning mark point coordinate in a scanning pattern, decadic and single digit conditions (i.e., digit and numerical value information) filled by the teacher are obtained according to the identified position information and assigned (as shown in figure 3), single-question scores filled by the teacher are obtained, the single-question scores are automatically input into a storage card, and the scores can be automatically summarized after scanning of all the question types of the whole test paper is sequentially completed, so that the test paper scores are obtained.

The template matching method is to obtain a score according to the identified position information. When the electronic book marking device is used specifically, a teacher fills numbers on a test paper in the form of fig. 3, then the scanning head scans images and then identifies the marked scores according to the corresponding filling positions.

The scanning pen can perform score accounting in the score calculating process, error correction is realized by intelligent text matching, and based on the grading matching technology contained in the scanning pen, if the image information processing result obtained by scanning is not matched with the mode threshold of the preset score (namely the identification score exceeds the question type maximum score), an error character appears on the display screen, and a teacher can select to re-fill and paint the image information processing result and scan the image information again.

The bar code identification area contains the question number and total score information (figure 3), the optical scanning head of the scanning pen can identify the question type (such as selection question, blank filling question and short answer question) through the bar code or the shape identification area on the test paper, and the score condition of each question and the number of the scanned question types can be displayed when the total score is added through the information such as the number of all the question types stored in the mode in advance, so that whether the question is missed or not can be judged.

Whether the problem is missed is judged mainly through quantity, whether the quantity of the scanned identification codes reaches the set quantity is judged, the scanned identification codes are output to calculate the total score, and if the quantity is not enough, the scanned identification codes cannot be output and the problem is judged to be missed.

When the filling is modified, the microprocessor can set the color of the image information identified by multiple scans to different colors, for example, the color identified by the first filling and scanning can be set to be striking red, if the in-situ modification of the filling error and the rescanning score accounting of the scanning pen are carried out, the blue color is used as the final score accounting in the rescanning state.

The microprocessor of the scanning pen has the additional function of supporting the small-scale accounting, and teachers who need to perform the small-scale accounting can perform the accounting of the sum of the scores of all the small scales in the large scale (as shown in figure 5) through the arrangement of the mobile phone end and the additional filling of the scanning end.

The additional function is also based on a template matching method after the binarization of the acquired image. Because the questions of different questions are different in type, the function needs to scan the blank filling template patterns of the questions in sequence in advance to obtain the specific coordinate of the positioning mark point of each question, and different from the total score accounting, each coordinate is fixed or is endowed with a specific score, and then the template matching is carried out according to the identified position information to obtain the score of the scanned questions.

The scanning pen is suitable for the test paper with a 'teacher full-filling' area, the test paper is easy to copy, and the original paper can be scanned by adding the 'teacher full-filling area special for reading the test paper'. This is prior art and will not be described further herein.

The invention does not need to use a high-accuracy Optical Character Recognition (OCR) technology, only needs to carry out image scanning and image processing, and can reduce a large amount of development and manufacturing cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A portable test paper scoring miniature scanning pen is characterized by comprising a pen body, wherein an optical scanning head is arranged at the end of the pen body to scan a test paper filling area; the optical scanning head is internally provided with an image sensor to obtain image information of a test paper marking identification area, the image sensor is connected with a micro processor, the micro processor aligns the image information with coordinates of a filling pattern template image, obtains position information of image information positioning mark points according to the positioning mark point coordinates of the template image, obtains digit and numerical value information of the image information and assigns values to obtain single-question scores, and collects the test paper scores after scanning all questions in sequence.

2. The portable test paper scoring miniature scanner pen of claim 1, wherein the scoring identification area is provided with a single digit and a ten digit scoring number, and the microprocessor identifies the scoring position and the numerical information in the image information.

3. The portable test paper scoring miniature scanner pen of claim 1, wherein the miniature processor compares the single-question score with a score threshold value, and prompts an error message if the single-question score is greater than the score threshold value.

4. The portable test paper scoring miniature scan pen of claim 3, wherein upon the occurrence of an error message prompt, the modified fill-in message is rescanned and the microprocessor sets the color of the image information identified for multiple scans to a different color.

5. The portable test paper scoring miniature scanning pen as claimed in claim 1, wherein after the optical scanning head identifies the question type, the optical scanning head determines whether the number of the identification codes reaches the set number according to the set number information of the question type to determine whether to miss the question.

6. The portable test paper scoring miniature scan pen of claim 1, wherein the miniature processor checks the score accuracy of the question by identifying and adding the scores of all the small questions in the question.

7. The portable test paper scoring miniature scanner pen of claim 1, wherein the miniature processor binarizes the acquired image based on image binarization technology.

8. The portable test paper scoring miniature scanner pen as in claim 1, wherein the miniature processor is connected to the electronic device, the image sensor identifies the number information of the test paper, and the miniature processor forms a table with the corresponding test paper score and number information and transmits the table to the electronic device.

9. The portable test paper scoring miniature scanner pen of claim 1, wherein said miniature processor stores different test question modules, the test question modules having different question type combinations and score value thresholds.

10. The portable test paper scoring miniature scanning pen as claimed in claim 1, wherein a switch button for controlling the start of scanning is arranged in the middle of the pen body.