CN115883867B - Test question video generation method, storage medium and device based on attached courseware video - Google Patents
Test question video generation method, storage medium and device based on attached courseware video Download PDFInfo
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Abstract
The invention discloses a test question video generation method, a storage medium and equipment based on a courseware video, which acquire teaching video data based on the courseware, wherein the teaching video data comprises video resources and corresponding courseware information; identifying and extracting test question data from courseware page content; acquiring courseware page content and page switching data in a video resource; determining time stamp information for switching into the courseware page content and time stamp information for switching out of the courseware page content in the video resource, and accordingly cutting out video clips corresponding to the courseware page content; and associating and binding each obtained video clip with the existing test question data and storing the video clip into a specified database. According to the invention, the teaching video of the attached courseware is utilized to construct the database for storing the test question data and the video in an associated manner, so that a user can accurately retrieve corresponding video resources through the test question data, and various online lesson video resources are more fully utilized.
Description
Technical Field
The invention relates to the technical field of intelligent education, in particular to a test question video generation method, a storage medium and equipment based on a courseware video.
Background
Along with the continuous development of intelligent education, the intelligent correction, identification and search functions of test questions are gradually mature, but relative to the search content of static texts, whether the learning ability of students is actually improved or multimedia resources is really improved, the function of searching video resources corresponding to knowledge points through test question pictures to learn is also realized at present, but the test questions corresponding to one knowledge point are various, the current question library is multiple in billions of questions, the video resources are searched precisely through the test questions, and an effective video resource and test question association binding scheme is needed.
In addition, the online classroom video greatly promotes the propagation of high-quality teaching resources, and is popular with users. Along with popularization of class recorded broadcast products, online class video resources are increased, so that users are difficult to find interesting video resources from a huge number of video libraries, and various online class video resources are not utilized efficiently.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a test question video generation method, a storage medium and equipment based on a courseware video.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A test question video generation method based on a courseware video comprises the following specific processes:
S1, acquiring teaching video data based on courseware, wherein the teaching video data comprises video resources and corresponding courseware information; the courseware information comprises page numbers of each page in courseware and courseware page content;
S2, identifying and extracting test question data from courseware page contents of each page acquired in the step S1;
S3, acquiring courseware page content and page switching data in the video resource:
S3.1, carrying out page number identification on each frame in the video resource, and matching courseware page contents corresponding to each frame from courseware information acquired in the step S1 by utilizing the page number obtained by identification;
S3.2, detecting courseware page content switching events in the video resource, and acquiring page number information of switching into the current courseware page content, time stamp information of switching into the current courseware page content and time stamp information of switching out of the current courseware page content when the courseware page content switching events occur;
S4, determining page numbers of courseware page contents with test question data according to the result of identifying the test question data from the courseware page contents in the step S2, determining time stamp information for switching into the courseware page contents and time stamp information for switching out of the courseware page contents in video resources according to the page switching data obtained in the step S3, and accordingly cutting out video clips corresponding to the courseware page contents; and associating and binding each obtained video clip with the existing test question data and storing the video clip into a specified database.
Further, in step S2, the test question data includes a test question text, and if the test question includes a picture, the test question data should also include a test question picture.
Further, the test question data further comprises answer text and analysis text.
Still further, in step S2, the test question data is identified from the content of the courseware page by any one of the following methods:
(1) Identifying and positioning the area of the test question block by using a preset test question feature map or keywords, and then extracting test question data from the test question block;
(2) Firstly, training a test question identification model through a large number of test question samples, identifying test question blocks in the page content of the courseware by using the test question identification model, and then extracting test question data from the test question blocks;
(3) The test question labels are manually marked in the page content of the courseware of each page, the test question blocks are identified through the test question labels, and then test question data are extracted from the test question blocks.
Further, in step S3.2, the process of detecting the courseware page content switching event in the video resource is: and comparing every two adjacent frames in the video resource, and judging that a courseware page content switching event occurs between every two adjacent frames when the difference value of the two adjacent frames is larger than a preset threshold value.
Further, in step S3.2, the page numbers of every two adjacent frames in the video resource are compared, and when the page numbers of every two adjacent frames are changed, it is determined that a courseware page content switching event occurs between the two frames.
The present invention also provides a computer readable storage medium having stored therein a computer program which when executed by a processor implements the above method.
The invention also provides a computer device comprising a processor and a memory for storing a computer program; the processor is configured to implement the above-described method when executing the computer program.
The invention has the beneficial effects that: according to the invention, the teaching video of the attached courseware is utilized to construct the database for storing the test question data and the video in an associated manner, so that a user can accurately retrieve corresponding video resources through the test question data, and various online lesson video resources are more fully utilized.
Detailed Description
The present invention will be further described below, and it should be noted that, while the present embodiment provides a detailed implementation manner and a specific operation process on the premise of the present technical solution, the protection scope of the present invention is not limited to the present embodiment.
The embodiment provides a test question video generation method based on a courseware video, which comprises the following specific processes:
S1, acquiring teaching video data based on courseware, wherein the teaching video data comprises video resources and corresponding courseware information; the courseware information comprises page numbers of each page in courseware and courseware page content;
S2, identifying and extracting test question data from courseware page contents of each page acquired in the step S1; the test question data at least comprises test question text, and also can comprise answer text, analysis text and the like; if the test questions contain pictures, the test question data should also contain the test question pictures.
Specifically, in this embodiment, the test question data is identified from the content of the courseware page by any one of the following methods:
(1) And extracting the test question blocks by using the test question feature map or the keywords. For example, a preset test question feature map, or a region of a test question block is positioned by matching keywords such as example question 1, solution, formula and the like, and then test question data is extracted from the test question block;
(2) Firstly, training a test question identification model through a large number of test question samples, identifying test question blocks in the page content of the courseware by using the test question identification model, and then extracting test question data from the test question blocks;
(3) The test question labels are manually marked in the page content of the courseware of each page, the test question blocks are identified through the test question labels (such as a mode of drawing rectangular frames on the test question blocks), and then test question data are extracted from the test question blocks.
S3, acquiring courseware page content and page switching data in the video resource:
S3.1, carrying out page number identification on each frame in the video resource, and matching courseware page contents corresponding to each frame from courseware information acquired in the step S1 by utilizing the page number obtained by identification; the current technology about page number recognition is more mature, and will not be described in detail here.
S3.2, detecting courseware page content switching events in the video resources, and acquiring page number information of switching into the current courseware page content, time stamp information of switching into the current courseware page content and time stamp information of switching out of the current courseware page content when the courseware page content switching events occur.
Specifically, one way to detect courseware page content switching events in a video asset is: and comparing every two adjacent frames in the video resource, and judging that a courseware page content switching event occurs between every two adjacent frames when the difference value of the two adjacent frames is larger than a preset threshold value. Another way is: and comparing the page numbers of every two adjacent frames in the video resource, and judging that a courseware page content switching event occurs between every two adjacent frames when the page numbers of the two adjacent frames are changed.
S4, determining page numbers of courseware page contents with test question data according to the result of identifying the test question data from the courseware page contents in the step S2, determining time stamp information for switching into the courseware page contents and time stamp information for switching out of the courseware page contents in video resources according to the page switching data obtained in the step S3, and accordingly cutting out video clips corresponding to the courseware page contents; and associating and binding each obtained video clip with the existing test question data and storing the video clip into a specified database.
The current online class video is generally attached with courseware, and the method of the embodiment utilizes teaching video attached with courseware to construct a database for storing test questions and video in an associated mode, so that a user can accurately retrieve corresponding video resources through test question data.
Various modifications and variations of the present invention will be apparent to those skilled in the art in light of the foregoing teachings and are intended to be included within the scope of the following claims.
Claims (8)
1. The test question video generation method based on the attached courseware video is characterized by comprising the following specific processes:
S1, acquiring teaching video data based on courseware, wherein the teaching video data comprises video resources and corresponding courseware information; the courseware information comprises page numbers of each page in courseware and courseware page content;
S2, identifying and extracting test question data from courseware page contents of each page acquired in the step S1;
S3, acquiring courseware page content and page switching data in the video resource:
S3.1, carrying out page number identification on each frame in the video resource, and matching courseware page contents corresponding to each frame from courseware information acquired in the step S1 by utilizing the page number obtained by identification;
S3.2, detecting courseware page content switching events in the video resource, and acquiring page number information of switching into the current courseware page content, time stamp information of switching into the current courseware page content and time stamp information of switching out of the current courseware page content when the courseware page content switching events occur;
S4, determining page numbers of courseware page contents with test question data according to the result of identifying the test question data from the courseware page contents in the step S2, determining time stamp information for switching into the courseware page contents and time stamp information for switching out of the courseware page contents in video resources according to the page switching data obtained in the step S3, and accordingly cutting out video clips corresponding to the courseware page contents; and associating and binding each obtained video clip with the existing test question data and storing the video clip into a specified database.
2. The method according to claim 1, wherein in step S2, the test question data includes test question text, and if the test question includes a picture, the test question data should include a test question picture.
3. The method of claim 2, wherein the question data further comprises answer text and parse text.
4. The method according to claim 1, wherein in step S2, the test question data is identified from the contents of the courseware page by any one of the following methods:
(1) Identifying and positioning the area of the test question block by using a preset test question feature map or keywords, and then extracting test question data from the test question block;
(2) Firstly, training a test question identification model through a large number of test question samples, identifying test question blocks in the page content of the courseware by using the test question identification model, and then extracting test question data from the test question blocks;
(3) The test question labels are manually marked in the page content of the courseware of each page, the test question blocks are identified through the test question labels, and then test question data are extracted from the test question blocks.
5. The method according to claim 1, wherein in step S3.2, the process of detecting a courseware page content switching event in a video resource is: and comparing every two adjacent frames in the video resource, and judging that a courseware page content switching event occurs between every two adjacent frames when the difference value of the two adjacent frames is larger than a preset threshold value.
6. The method according to claim 1, wherein in step S3.2, page numbers of two adjacent frames in the video resource are compared, and when the page numbers of two adjacent frames change, it is determined that a courseware page content switching event occurs between the two frames.
7. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the method of any of claims 1-6.
8. A computer device comprising a processor and a memory, said computer device comprising
The memory is used for storing a computer program; the processor is configured to execute the computer program,
The method of any one of claims 1-6 is implemented.
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