CN111612088A - Method and device for detecting image of superimposed character - Google Patents
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Abstract
The invention discloses a method and a device for detecting an image of a superimposed character. Wherein, the method comprises the following steps: acquiring an image to be detected with superposed characters, wherein the superposed characters comprise identification information of source equipment generating the image; identifying a designated area with superposed characters in the image, and determining the superposed characters in the image; searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices; and confirming that the superposed character is correct under the condition that the identification information of the source equipment same as the identification information of the superposed character is found, and confirming that the superposed character is wrong under the condition that the identification information of the source equipment same as the identification information of the superposed character is not found. The invention solves the technical problems of poor detection accuracy and low efficiency of a mode of manually identifying the superposed characters of the images in the related technology.
Description
Technical Field
The invention relates to the field of image detection, in particular to a method and a device for detecting an image of a superposed character.
Background
The urban rail transit video monitoring system is used as a matched device for urban rail transit operation management automation, can provide visual information on the aspects of train operation, disaster prevention and relief, passenger dispersion, social security and the like for dispatchers and operators on duty at various stations of a control center, and is an important guarantee means for rail transit safe operation and maintenance. In the video monitoring system, the character superposition of the front-end video acquisition equipment can provide camera position information, time information and controller information in a video image, and the camera position information, the time information and the controller information are key information required by later-stage calling processing and scheduling use of a dispatcher. The accuracy and easy identification of the superposed characters are necessary conditions for ensuring accurate acquisition of relevant information.
At present, with the increasing development of rail transit, the number of camera points accessed by a video monitoring system is more and more, the traditional method for manually checking character information superposed in a camera picture is difficult to meet the requirements of construction and operation, and an automatic batch method and system for checking character superposition accuracy of cameras are urgently needed.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting an image of superimposed characters, which are used for at least solving the technical problems of poor detection accuracy and low efficiency in a mode of manually identifying the superimposed characters of the image in the related technology.
According to an aspect of an embodiment of the present invention, there is provided a method of detecting an image of an overlay character, including: acquiring an image to be detected with superposed characters, wherein the superposed characters comprise identification information of source equipment generating the image; identifying a designated area with the superposed characters in the image, and determining the superposed characters in the image; searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices; and confirming that the superimposed character is correct when the identification information of the source device identical to the identification information of the superimposed character is found, and confirming that the superimposed character is wrong when the identification information of the source device identical to the identification information of the superimposed character is not found.
Optionally, the acquiring the image with the superimposed characters to be detected includes: acquiring a video stream to be detected, wherein the video stream has superposed characters; and intercepting a picture from the video stream to obtain the image.
Optionally, before searching and comparing the identification information of the superimposed character with the identification information of the plurality of pre-stored source devices, the method further includes: receiving a detection task for detecting a plurality of video streams; and under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is found, the superposed character is confirmed to be correct, under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is not found, after the superposed character is confirmed to be wrong, another video stream of the detection task is selected for detection until all the video streams of the detection task are detected, and the detection task is completed.
Optionally, after the detection task is completed, the method further includes: and generating a monitoring report including the detected video stream information and the detection result of the video stream.
Optionally, the video stream is a video stream of a traffic video surveillance system.
Optionally, identifying the designated area with the overlay character in the image, and determining the overlay character in the image includes: identifying structured information of the designated area of the image, wherein the overlay character is overlaid on the image in the form of structured information; and determining the superposition character through the structural information.
Optionally, before searching and comparing the identification information of the superimposed character with the identification information of the plurality of pre-stored source devices, the method further includes: receiving identification information of all video acquisition terminals of a video system, wherein the identification information comprises at least one of the following: the name of the video acquisition terminal, the IP address of the video acquisition terminal and the actual address distributed by the video acquisition terminal; and storing the identification information of all the video acquisition terminals in a database.
According to another aspect of the embodiments of the present invention, there is also provided a detection apparatus of an image of superimposed characters, including: the device comprises an acquisition module, a display module and a display module, wherein the acquisition module acquires an image to be detected with superposed characters, and the superposed characters comprise identification information of source equipment generating the image; the identification module is used for identifying the designated area with the superposed characters in the image and determining the superposed characters in the image; the detection module is used for searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices; and confirming that the superimposed character is correct when the identification information of the source device identical to the identification information of the superimposed character is found, and confirming that the superimposed character is wrong when the identification information of the source device identical to the identification information of the superimposed character is not found.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium, where the storage medium includes a stored program, and when the program runs, the apparatus where the storage medium is located is controlled to execute the method for detecting the image of the superimposed character described in any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor configured to execute a program, where the program executes the method for detecting the image of the superimposed character described in any one of the above.
In the embodiment of the invention, an image to be detected with superposed characters is obtained, wherein the superposed characters comprise identification information of source equipment generating the image; identifying a designated area with superposed characters in the image, and determining the superposed characters in the image; searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices; the method comprises the steps of confirming that the superposed characters are correct under the condition that identification information of source equipment identical to identification information of the superposed characters is found, confirming that the superposed characters are incorrect under the condition that the identification information of the source equipment identical to the identification information of the superposed characters is not found, and confirming that the superposed data are correct by comparing the superposed characters identified by the picture with identification information of prestored source equipment of the image under the condition that the identification information of the source equipment in the superposed characters is identical to prestored new identification information of the source equipment, so that the aim of effectively detecting the superposed data on the image is fulfilled, the technical effects of improving the detection efficiency and the detection accuracy of the superposed data of the image are achieved, and further the technical problems of poor detection accuracy and low efficiency caused by the mode of manually identifying the superposed characters of the image in the related technology are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of a detection method of an image of an overlay character according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a video image overlay character detection system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of detecting a video image overlay character according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a detection apparatus for superimposing an image of a character according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method of detecting an image of superimposed characters, it is noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a flowchart of a detection method of an image of superimposed characters according to an embodiment of the present invention, as shown in fig. 1, the method including the steps of:
step S102, acquiring an image to be detected with superposed characters, wherein the superposed characters comprise identification information of source equipment generating the image;
step S104, identifying the designated area with the superimposed characters in the image, and determining the superimposed characters in the image;
step S106, searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices;
step S108, confirming that the superposed character is correct under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is found, and confirming that the superposed character is wrong under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is not found.
Through the steps, the image to be detected with the superposed characters is obtained, wherein the superposed characters comprise identification information of source equipment generating the image; identifying a designated area with superposed characters in the image, and determining the superposed characters in the image; searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices; the method comprises the steps of confirming that the superposed characters are correct under the condition that identification information of source equipment identical to identification information of the superposed characters is found, confirming that the superposed characters are incorrect under the condition that the identification information of the source equipment identical to the identification information of the superposed characters is not found, and confirming that the superposed data are correct by comparing the superposed characters identified by the picture with identification information of prestored source equipment of the image under the condition that the identification information of the source equipment in the superposed characters is identical to prestored new identification information of the source equipment, so that the aim of effectively detecting the superposed data on the image is fulfilled, the technical effects of improving the detection efficiency and the detection accuracy of the superposed data of the image are achieved, and further the technical problems of poor detection accuracy and low efficiency caused by the mode of manually identifying the superposed characters of the image in the related technology are solved.
The execution main body of the steps can be a detection terminal, and the monitoring terminal can be a computer, a server and the like. And acquiring an image to be detected, wherein the image to be detected can be an image stored in a database or an image data stream acquired in real time by an image acquisition device. The image may be a picture of a video stream in a video surveillance system.
The video monitoring system comprises a plurality of video acquisition devices, generates video streams, sends the video streams to a monitoring terminal of the video monitoring system through the Ethernet, and displays videos through the monitoring terminal. The video stream is composed of a plurality of frames of images, and pictures of the video stream can be obtained by performing frame cutting processing on the video stream. Optionally, the acquiring the image with the superimposed characters to be detected includes: acquiring a video stream to be detected, wherein the video stream has superposed characters; and intercepting a picture from the video stream to acquire an image.
The superimposed characters may be structured information, and the superimposed characters in the image may be determined by recognizing the structured information of the picture. When the superimposed characters are superimposed on the picture generation device, the superimposed characters are superimposed on a specified area of the picture, for example, a specified area of a preset size at a preset position in the lower right corner. Since the image is generally unstructured information, the overlay character of the image can be quickly determined by identifying the structured information of the designated area of the image, and the identification efficiency of the overlay character of the image can be effectively improved by identifying the designated area in the image.
After the superimposed characters are determined, searching and comparing identification information of source equipment generating images in the superimposed characters with identification information of a plurality of source equipment stored in advance, confirming that the superimposed characters are correct under the condition that the identification information of the source equipment same as the identification information of the superimposed characters is searched, and confirming that the superimposed characters are wrong under the condition that the identification information of the source equipment same as the identification information of the superimposed characters is not searched. Therefore, the purpose of effectively detecting the superposed data on the image is achieved, the technical effects of improving the efficiency and the accuracy of the superposed data detection of the image are achieved, and the technical problems that in the related technology, the detection accuracy is poor and the efficiency is low due to the mode of manually identifying the superposed characters of the image are solved.
The source devices may be a plurality of video capture devices of the video monitoring system, and the identification information of the source device may be a name of the video capture terminal, an IP address of the video capture terminal, and an actual address of the video capture terminal. The video acquisition device can be a camera, a video camera and the like.
Optionally, before searching and comparing the identification information of the superimposed character with the identification information of the plurality of source devices stored in advance, the method further includes: receiving a detection task for detecting a plurality of video streams; and under the condition that the identification information of the source equipment which is the same as the identification information of the superposed characters is found, the superposed characters are confirmed to be correct, under the condition that the identification information of the source equipment which is the same as the identification information of the superposed characters is not found, after the superposed characters are confirmed to be wrong, another video stream of the detection task is selected for detection until all the video streams of the detection task are detected, and the detection task is completed.
The detection task may include detecting a plurality of video streams, and after receiving the monitoring task, detecting the plurality of video streams by the corresponding detection task. The plurality of video streams can be detected according to a preset sequence, the plurality of video streams can be detected simultaneously through parallel detection modules, and finally, the results are collected to generate the detection result of the task. Optionally, in a case that the plurality of video streams may be detected according to a preset sequence, after the detection task is completed, the method further includes: and generating a monitoring report including the detected video stream information and the detection result of the video stream.
Optionally, the video stream is a video stream of a traffic video surveillance system.
Optionally, identifying the designated area with the overlay character in the image, and determining the overlay character in the image includes: identifying structured information of a designated area of an image, wherein the superimposed characters are superimposed on the image in the form of the structured information; the superimposed characters are determined by the structured information.
Optionally, before searching and comparing the identification information of the superimposed character with the identification information of the plurality of source devices stored in advance, the method further includes: receiving identification information of all video acquisition terminals of a video system, wherein the identification information comprises at least one of the following: the name of the video acquisition terminal, the IP address of the video acquisition terminal and the actual address distributed by the video acquisition terminal; and storing the identification information of all the video acquisition terminals in a database.
It should be noted that this embodiment also provides an alternative implementation, which is described in detail below.
The embodiment provides a method and a system for checking character superposition accuracy of a video image.
The rail transit video character superposition accuracy detection method and system provided by the embodiment effectively avoid the influence of subjective factors such as work experience and attention of verification personnel on the verification result, reduce the labor cost and provide objective and effective character accuracy detection results.
The video image character superposition correctness detection system provided by the embodiment effectively avoids the influence of inconsistent parameter standards caused by different manufacturers and different construction periods of the field cameras by adopting a standardized structured data format.
The detection flow is modularly designed, the detection terminal is used for inputting the information of the camera and displaying the detection result, and the detection service modules are used for detecting the accuracy of the characters.
The embodiment records the camera information, the detection task process data and the detection result in batch by establishing the database so as to meet the requirement of checking the task of the image character superposition accuracy of the rail transit surveillance cameras with increasing quantity.
Fig. 2 is a schematic diagram of a detection system for a video image character superimposition according to an embodiment of the present invention, and as shown in fig. 2, the constituent structure of the video image character superimposition accuracy check system of the present embodiment is as follows:
the video image character superposition accuracy checking system comprises a detection terminal and a detection service.
Detecting a terminal: the method is used for importing the point table containing information such as camera names, camera IP addresses and stream fetching addresses. For controlling the switching on or off of the detection tasks. And the method is used for displaying a detection result report and detailed detection contents.
And (3) detection service: the functions of detection task flow management, streaming media communication, database updating, clock timing and the like are realized through a modular design.
Fig. 3 is a flowchart of a method for detecting a video image overlay character according to an embodiment of the present invention, and as shown in fig. 3, the workflow of the video image character overlay accuracy check system of the present embodiment is as follows:
step 1: and importing a point table containing information such as camera names, camera IP addresses, streaming addresses and the like through the system detection terminal, and storing a database.
Step 2: and starting the detection task, and starting the detection task by the center and the detection management module.
And step 3: the streaming media module reads camera information in the database, pulls a first frequency stream, intercepts a video picture and records intercepting time.
And 4, step 4: the character recognition module recognizes the characters of the designated area in the picture according to the video picture intercepted by the media service and outputs the structured information (the superposed equipment name and position information, the superposed clock information and the superposed user information on the video picture).
And 5: the detection task management server compares the structural information output by the character recognition module with the camera information in the database, and the database module stores the comparison result.
Step 6: and continuing to execute the steps 3, 4 and 5 until the task is finished.
And 7: and the detection terminal synchronously acquires the detection progress and displays the real-time detection result in a report form or a detailed information mode.
This embodiment has the following advantages:
1. the automatic detection method and the system for the character superposition accuracy of the video image effectively avoid the influence of subjective factors such as the working experience and the attention of the verification personnel on the verification result, reduce the labor cost and provide objective and effective character accuracy detection results.
2. The video image character superposition correctness detection system provided by the embodiment records the camera information, the detection task process data and the detection result in batches by building the database, and adopts a standardized structured data format, thereby effectively avoiding the influence of inconsistent parameter standards caused by different manufacturers and different construction periods of the field cameras, and greatly improving the universality and the working efficiency of the system.
3. The detection flow is modularly designed, the detection terminal is used for inputting the information of the camera and displaying the detection result, and the detection service modules are used for detecting the accuracy of the characters, so that the flexibility of the system is improved.
The video image character superposition accuracy checking system comprises a detection terminal and a detection service.
Detecting a terminal: the method is used for importing the point table containing information such as camera names, camera IP addresses and stream fetching addresses. For turning on or off the detection task. And the method is used for displaying a detection result report and detailed detection contents.
And (3) detection service: the system comprises a detection and center management module, a streaming media module, a character recognition module, a database module and a clock module.
A detection task management module: comparing the structured information identified by the characters with the camera information in the database, and outputting a comparison result; executing a command issued by the terminal to manage the task; and managing the database.
The streaming media module: and pulling the video stream of the camera through information such as the stream address and the like of the camera, and capturing the video picture.
A character recognition module: according to the video picture intercepted by the media service, the characters in the appointed area in the picture are identified, and the structured information is output
A database module: recording camera information including, but not limited to, camera name, camera IP address, streaming address, etc.; recording the task state; recording detection process data including but not limited to structural information after video picture interception and character recognition; and recording the detection result.
A clock module: the method is used for timing with a system mother clock and ensuring the accuracy of the system clock.
Fig. 4 is a schematic diagram of a detection apparatus for an image of superimposed characters according to an embodiment of the present invention, and as shown in fig. 4, according to another aspect of the embodiment of the present invention, there is also provided a detection apparatus for an image of superimposed characters, including: an acquisition module 42, an identification module 44, and a detection module 46, which are described in detail below.
An acquisition module 42, configured to acquire an image to be detected with superimposed characters, where the superimposed characters include identification information of a source device that generates the image; a recognition module 44, connected to the obtaining module 42, for recognizing the designated area with the superimposed characters in the image and determining the superimposed characters in the image; a detection module 46, connected to the identification module 44, for searching and comparing the identification information of the superimposed characters with the identification information of the source devices stored in advance; and confirming that the superposed character is correct under the condition that the identification information of the source equipment same as the identification information of the superposed character is found, and confirming that the superposed character is wrong under the condition that the identification information of the source equipment same as the identification information of the superposed character is not found.
By the device, the acquisition module 42 is adopted to acquire the image to be detected with the superposed characters, wherein the superposed characters comprise identification information of the source equipment generating the image; the identification module 44 identifies the designated area with the superimposed characters in the image and determines the superimposed characters in the image; the detection module 46 searches and compares the identification information of the superimposed characters with the identification information of a plurality of pre-stored source devices; the method comprises the steps of confirming that the superposed characters are correct under the condition that identification information of source equipment identical to identification information of the superposed characters is found, confirming that the superposed characters are incorrect under the condition that the identification information of the source equipment identical to the identification information of the superposed characters is not found, and confirming that the superposed data are correct by comparing the superposed characters identified by the picture with identification information of prestored source equipment of the image under the condition that the identification information of the source equipment in the superposed characters is identical to prestored new identification information of the source equipment, so that the aim of effectively detecting the superposed data on the image is fulfilled, the technical effects of improving the detection efficiency and the detection accuracy of the superposed data of the image are achieved, and further the technical problems of poor detection accuracy and low efficiency caused by the mode of manually identifying the superposed characters of the image in the related technology are solved.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium including a stored program, wherein when the program runs, an apparatus where the storage medium is located is controlled to execute the method for detecting the image of the superimposed character according to any one of the above.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, wherein the program executes a method for detecting an image of an overlaid character according to any one of the above.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for detecting an image of superimposed characters, comprising:
acquiring an image to be detected with superposed characters, wherein the superposed characters comprise identification information of source equipment generating the image;
identifying a designated area with the superposed characters in the image, and determining the superposed characters in the image;
searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices;
and confirming that the superimposed character is correct when the identification information of the source device identical to the identification information of the superimposed character is found, and confirming that the superimposed character is wrong when the identification information of the source device identical to the identification information of the superimposed character is not found.
2. The method of claim 1, wherein acquiring the image with the superimposed characters to be detected comprises:
acquiring a video stream to be detected, wherein the video stream has superposed characters;
and intercepting a picture from the video stream to obtain the image.
3. The method according to claim 2, wherein before the searching and comparing the identification information of the superimposed character with the identification information of the plurality of pre-stored source devices, the method further comprises:
receiving a detection task for detecting a plurality of video streams;
and under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is found, the superposed character is confirmed to be correct, under the condition that the identification information of the source equipment which is the same as the identification information of the superposed character is not found, after the superposed character is confirmed to be wrong, another video stream of the detection task is selected for detection until all the video streams of the detection task are detected, and the detection task is completed.
4. The method of claim 3, wherein after completing the detection task, further comprising:
and generating a monitoring report including the detected video stream information and the detection result of the video stream.
5. The method of any of claims 2 to 4, wherein the video stream is a video stream of a traffic video surveillance system.
6. The method of claim 1, wherein identifying the designated area in the image having the overlay character comprises:
identifying structured information of the designated area of the image, wherein the overlay character is overlaid on the image in the form of structured information;
and determining the superposition character through the structural information.
7. The method according to claim 1, wherein before searching and comparing the identification information of the superimposed character with the identification information of the plurality of pre-stored source devices, the method further comprises:
receiving identification information of all video acquisition terminals of a video system, wherein the identification information comprises at least one of the following: the name of the video acquisition terminal, the IP address of the video acquisition terminal and the actual address distributed by the video acquisition terminal;
and storing the identification information of all the video acquisition terminals in a database.
8. An apparatus for detecting an image of superimposed characters, comprising:
the device comprises an acquisition module, a display module and a display module, wherein the acquisition module acquires an image to be detected with superposed characters, and the superposed characters comprise identification information of source equipment generating the image;
the identification module is used for identifying the designated area with the superposed characters in the image and determining the superposed characters in the image;
the detection module is used for searching and comparing the identification information of the superposed characters with the identification information of a plurality of pre-stored source devices;
and confirming that the superimposed character is correct when the identification information of the source device identical to the identification information of the superimposed character is found, and confirming that the superimposed character is wrong when the identification information of the source device identical to the identification information of the superimposed character is not found.
9. A storage medium characterized by comprising a stored program, wherein a device on which the storage medium is located is controlled to execute the method for detecting an image of an overlaid character according to any one of claims 1 to 7 when the program is executed.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method of detecting an image of an overlaid character according to any one of claims 1 to 7 when running.
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