CN108399025B - Method and device for correcting identification deviation and terminal equipment - Google Patents
Method and device for correcting identification deviation and terminal equipment Download PDFInfo
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- CN108399025B CN108399025B CN201810194862.0A CN201810194862A CN108399025B CN 108399025 B CN108399025 B CN 108399025B CN 201810194862 A CN201810194862 A CN 201810194862A CN 108399025 B CN108399025 B CN 108399025B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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Abstract
The invention is suitable for the technical field of information processing, and provides a method, a device and a terminal device for correcting identification deviation, wherein the method comprises the following steps: receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track; acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track; and correcting the coordinate vector of the writing track according to the deviation value. The method for correcting the recognition deviation can improve the accuracy of recognizing the writing track, and has higher practicability and usability.
Description
Technical Field
The invention belongs to the technical field of information processing, and particularly relates to a method and a device for correcting identification deviation and terminal equipment.
Background
With the continuous development of various touch screens, various intelligent devices realize the function of identifying various operation tracks such as touch, writing and the like on the devices; for example, a book can be placed on a "writing board" of a smart device such as a tablet, a specific pen is used for writing on the book, and then the smart device recognizes a writing track to help a user compare with preset content on the smart device, so that interaction is achieved. In practical use, however, the position of the article used for writing, such as a book, is often deviated, so that the recognition accuracy is low, and the practicability is poor.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, an apparatus, and a terminal device for correcting an identification deviation, so as to improve accuracy of identifying a writing track, and have high practicability and usability.
A first aspect of an embodiment of the present invention provides a method for correcting an identification deviation, including:
receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track;
acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track;
and correcting the coordinate vector of the writing track according to the deviation value.
A second aspect of an embodiment of the present invention provides an apparatus for correcting an identification deviation, including:
the receiving module is used for receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track;
the comparison module is used for acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track;
and the correction module is used for correcting the coordinate vector of the writing track according to the deviation value.
A third aspect of the embodiments of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method as described above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: in the embodiment of the invention, a coordinate vector of a writing track is received, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track; acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track; and correcting the coordinate vector of the writing track according to the deviation value. According to the embodiment of the invention, the deviation value of the writing track is obtained, and the coordinate vector of the writing track is corrected according to the deviation value, so that even if the writing articles such as books of a user are deviated, the writing articles can be correctly identified, the accuracy rate of identifying the writing track is improved, and the writing track recognition method has higher practicability and usability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating an implementation of a method for correcting an identification deviation according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating an implementation of a method for correcting an identification deviation according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a method for correcting recognition bias according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal device according to a fourth embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a method for correcting an identification deviation according to an embodiment of the present invention, and as shown in fig. 1, the method may include the following steps:
step S101, receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track.
In the embodiment of the present invention, the writing track may be a track detected through a touch screen, and may be, for example, a writing track of a user detected through a touch screen below a book after the user fixes the book at a specific position and then writes on the book. The writing trajectory includes at least one writing point. The writing track can be the detected track of the content such as letters, numbers, pinyin, Chinese characters, strokes, patterns and the like written by the user. Alternatively, the coordinate vector of the writing track may be obtained by combining coordinate vectors of a plurality of writing points.
Step S102, obtaining a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track.
In an embodiment of the present invention, the predetermined writing point may be at least one writing point in the writing track according to a writing sequence, such as a first writing point or a last writing point, and a deviation value of the writing track is determined by calculating a difference value between a coordinate vector of the writing point and a coordinate vector of a standard point corresponding to the writing point; or obtaining a plurality of writing points, and calculating a mean value of difference values between the coordinate vectors of the plurality of writing points and the coordinate vector of the corresponding standard point as a deviation value of the writing track.
Optionally, in the embodiment of the present invention, the obtaining the coordinate vector of the predetermined writing point, and comparing the coordinate vector of the predetermined writing point with the coordinate vector of the standard point corresponding to the writing point according to a preset manner, and determining the deviation value of the writing track may include:
and acquiring a coordinate vector of a first writing point in the writing track according to a writing sequence, comparing the coordinate vector of the first writing point with the coordinate vector of a corresponding standard point, and taking the difference value between the coordinate vector of the first writing point and the coordinate vector of the corresponding standard point as the deviation value of the writing track.
And S103, correcting the coordinate vector of the writing track according to the deviation value.
Optionally, in the embodiment of the present invention, the correcting the coordinate vector of the writing track according to the offset value may be obtained by adding the offset value to the coordinate vector of each writing point on the writing track.
In the embodiment of the invention, a coordinate vector of a writing track is received, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track; acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track; and correcting the coordinate vector of the writing track according to the deviation value. According to the embodiment of the invention, the deviation value of the writing track is obtained, and the coordinate vector of the writing track is corrected according to the deviation value, so that even if the writing articles such as books of a user are deviated, the writing articles can be correctly identified, the accuracy rate of identifying the writing track is improved, and the writing track recognition method has higher practicability and usability.
Fig. 2 is a schematic flow chart of an implementation of a method for correcting an identification deviation according to a second embodiment of the present invention, and as shown in fig. 2, the method may include the following steps:
in step S201, a coordinate vector of a writing trajectory including a coordinate vector of at least one writing point on the writing trajectory is received.
In step S202, a coordinate vector of a predetermined writing point is obtained, and the coordinate vector of the predetermined writing point is compared with a coordinate vector of a standard point corresponding to the writing point in a preset manner, so as to determine a deviation value of the writing trajectory.
In step S203, the coordinate vector of the writing track is corrected according to the deviation value.
Steps S201, S202, and S203 in this embodiment are the same as steps S101, S102, and S103, and specific reference may be made to the description of steps S101, S102, and S103, which is not repeated herein.
In step S204, the coordinate vector of the corrected writing track is compared with the coordinate vector of the corresponding preset standard point according to a preset sequence to determine whether the writing track is correct.
Optionally, in this embodiment of the present invention, the preset sequence may be a sequential sequence formed according to an order of writing strokes. Optionally, the standard points and the writing points may be sequentially ordered according to the order of writing strokes, and then the coordinate vector of the corrected writing track is compared with the coordinate vector of the corresponding preset standard point, so that the adverse effect of the recognition deviation caused by the position deviation of the article during writing on the judgment of the subsequent writing track is reduced.
In the embodiment of the invention, a coordinate vector of a writing track is received, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track; acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track; correcting the coordinate vector of the writing track according to the deviation value; and comparing the coordinate vector of the corrected writing track with the corresponding coordinate vector of the preset standard point according to a preset sequence to determine whether the writing track is correct. According to the embodiment of the invention, the deviation value of the writing track is obtained, the coordinate vector of the writing track is corrected according to the deviation value, and then the corrected coordinate vector of the writing track is compared with the corresponding coordinate vector of the preset standard point, so that the adverse effect of the recognition deviation caused by the position deviation of the writing articles such as books of a user on the judgment of the subsequent writing track is reduced, the accuracy rate of recognizing the writing track is improved, and the writing track recognition method and device have higher practicability and usability.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 3 is a schematic diagram of an apparatus for correcting recognition errors according to a third embodiment of the present invention. For convenience of explanation, only portions related to the embodiments of the present invention are shown.
The apparatus for correcting the recognition error includes:
a receiving module 31, configured to receive a coordinate vector of a writing track, where the coordinate vector of the writing track includes a coordinate vector of at least one writing point on the writing track;
the comparison module 32 is configured to obtain a coordinate vector of a predetermined writing point, compare the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point in a preset manner, and determine a deviation value of the writing track;
and a correcting module 33, configured to correct the coordinate vector of the writing track according to the deviation value.
Fig. 4 is a schematic diagram of a terminal device according to a fourth embodiment of the present invention. As shown in fig. 4, the terminal device 4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40 executes the computer program 42 to implement the steps in the above-described embodiments of the method of correcting identification deviation, such as the steps 101 to 103 shown in fig. 1. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 31 to 33 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program 42 in the terminal device 4. For example, the computer program 42 may be divided into a receiving module, a comparing module, and a modifying module, and each module has the following specific functions:
the receiving module is used for receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track;
the comparison module is used for acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track;
and the correction module is used for correcting the coordinate vector of the writing track according to the deviation value.
The terminal device 4 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of a terminal device 4 and does not constitute a limitation of terminal device 4 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 40 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the terminal device 4, such as a hard disk or a memory of the terminal device 4. The memory 41 may also be an external storage device of the terminal device 4, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the terminal device 4. Further, the memory 41 may also include both an internal storage unit and an external storage device of the terminal device 4. The memory 41 is used for storing the computer program and other programs and data required by the terminal device. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of 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, devices or units, and may be in an electrical, mechanical 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 network 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 modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (6)
1. A method of correcting an identification bias, comprising:
receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track;
acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track, wherein the method comprises the following steps: acquiring a plurality of writing points, and calculating the mean value of the difference values of the coordinate vectors of the writing points and the coordinate vectors of the corresponding standard points as the deviation value of the writing track; the predetermined writing point is at least one writing point in the writing trajectory according to a writing order; the standard points and the writing points are sequentially ordered according to the sequence of writing strokes;
correcting the coordinate vector of the writing track according to the deviation value, comprising: adding the deviation value to the coordinate vector of each writing point on the writing track to obtain a corrected coordinate vector of the writing track;
comparing the corrected coordinate vector of the writing track with the corresponding coordinate vector of the preset standard point according to a preset sequence to determine whether the writing track is correct or not; the preset sequence is a sequential sequence formed according to the order of writing strokes.
2. The method of claim 1, wherein the obtaining the coordinate vector of the predetermined writing point, comparing the coordinate vector of the predetermined writing point with the coordinate vector of the standard point corresponding to the writing point in a preset manner, and determining the deviation value of the writing trajectory comprises:
and acquiring a coordinate vector of a first writing point in the writing track according to a writing sequence, comparing the coordinate vector of the first writing point with the coordinate vector of a corresponding standard point, and taking the difference value between the coordinate vector of the first writing point and the coordinate vector of the corresponding standard point as the deviation value of the writing track.
3. An apparatus for correcting recognition bias, comprising:
the receiving module is used for receiving a coordinate vector of a writing track, wherein the coordinate vector of the writing track comprises a coordinate vector of at least one writing point on the writing track;
the comparison module is used for acquiring a coordinate vector of a predetermined writing point, comparing the coordinate vector of the predetermined writing point with a coordinate vector of a standard point corresponding to the writing point according to a preset mode, and determining a deviation value of the writing track, and comprises: acquiring a plurality of writing points, and calculating the mean value of the difference values of the coordinate vectors of the writing points and the coordinate vectors of the corresponding standard points as the deviation value of the writing track; the predetermined writing point is at least one writing point in the writing trajectory according to a writing order; the standard points and the writing points are sequentially ordered according to the sequence of writing strokes;
the correction module is used for correcting the coordinate vector of the writing track according to the deviation value; the correction module is specifically configured to: adding the deviation value to the coordinate vector of each writing point on the writing track to obtain a corrected coordinate vector of the writing track;
the recognition module is used for comparing the coordinate vector of the corrected writing track with the coordinate vector of the corresponding preset standard point according to a preset sequence so as to determine whether the writing track is correct or not; the preset sequence is a sequential sequence formed according to the order of writing strokes.
4. The apparatus of claim 3, wherein the comparison module is specifically configured to:
and acquiring a coordinate vector of a first writing point in the writing track according to a writing sequence, comparing the coordinate vector of the first writing point with the coordinate vector of a corresponding standard point, and taking the difference value between the coordinate vector of the first writing point and the coordinate vector of the corresponding standard point as the deviation value of the writing track.
5. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to claim 1 or 2 are implemented when the processor executes the computer program.
6. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to claim 1 or 2.
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| CN110722903A (en) * | 2019-11-08 | 2020-01-24 | 青岛罗博智慧教育技术有限公司 | Track recording device and track recording method |
| CN111475035A (en) * | 2020-04-14 | 2020-07-31 | 青岛真水堂教育咨询有限公司 | Intelligent writing equipment based on calligraphy exercise |
| CN112667103B (en) * | 2020-12-28 | 2023-10-17 | 北京字节跳动网络技术有限公司 | Correction method and device for writing device, terminal and storage medium |
| CN113986032B (en) * | 2021-08-18 | 2024-05-10 | 陈颖 | Method and device for adjusting writing track deviation of intelligent handwriting pen |
| CN115328383A (en) * | 2022-08-22 | 2022-11-11 | 珠海凯芯微电子科技有限公司 | Identification method and system for display equipment |
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