CN103324917A - Handwriting chirography inputting device including finger information - Google Patents
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Abstract
The invention provides a handwriting chirography inputting device including finger information, and belongs to the field of computer information and the electronic field. The handwriting inputting device collects handwriting chirography information and fingerprint information of a finger, wherein the handwriting chirography information and the fingerprint information of the finger are generated during the writing process by taking the finger as a writing tool. An information capturing device of the handwriting chirography inputting device including the finger information comprises a fingerprint sensor, a displayer and a multi-dimensional force sensor, wherein the multi-dimensional force sensor is arranged below the displayer, the displayer is arranged above the multi-dimensional force sensor, and the fingerprint sensor is arranged above the displayer. The fingerprint sensor is used for achieving the capturing of the fingerprint image information, the multi-dimensional force sensor is used for achieving the capturing of pressure information applied on a writing plane of the finger, and the displayer is used for achieving the displaying of handwriting track information and displaying the information to a user. Compared with the device collecting the handwriting chirography and other physiological features, the handwriting chirography inputting device including the finger information collects the handwriting chirography information and the fingerprint information of the finger during the writing process by taking the finger as the writing tool, difficulty of attacking can be effectively increased, and therefore the safety of an authentication system is improved.
Description
Technical field
The present invention relates to computerized information field and electronic applications, particularly comprise the handwriting input equipment of finger information.
Background technology
Along with the develop rapidly of ecommerce, the authenticating user identification problem of net environment becomes and becomes increasingly conspicuous.Handwriting is suitable for the application of net environment natively because of it kind specific character that possesses.But, because the threat that intrinsic difference and potential high similarity are imitated person's handwriting between the true person's handwriting so that at present the online handwriting authentication mode can't satisfy the demand for security of application system fully.Therefore, people expect handwriting and other physiological characteristic are merged, and improve the overall security of Verification System.Be CN1794266A in China Patent Publication No., name is called in " identification and authentication method that biological characteristic merges " patent, discloses the method that handwriting and the physiological characteristics such as people's face, iris are merged mutually.
Yet, in security breaches of the above-mentioned fusion method existence of net environment use, i.e. separate collection apparatus process.The assailant presents to Verification System successively with it after the feature of collecting respectively the user, in this case, the Verification System overall security is the maximum of subsystems.So-called independently collection apparatus process refers to because physiological characteristic belongs to different piece or the behavioural characteristic aquatic weeds of health to be contained in different processes, and a kind of collection of feature is not take the collection of further feature as prerequisite.Obviously, the separate many Fusion Features of gatherer process can't really solve the safety problem of on-line authentication.
A kind of common activity of writing is to write the people to finish at writing plane as writing implement with its finger.In this activity, the handwriting information that stays except comprising finger motion comprises also that finger contacts with writing plane and the dynamic and static information that produces.Multidate information comprises that finger is applied to the pressure on the supporting surface; Static information comprises the finger print image that contacts with writing plane.For the assailant, when imitating person's handwriting, it but is very difficult also will presenting the finger print image information to system.
Summary of the invention
Technical matters to be solved by this invention is: avoid above-mentioned the deficiencies in the prior art part, develop a kind of handwriting input equipment that comprises finger information.Particularly, the present invention can realize obtaining in the time of to hand-written handwriting information and finger print image information in the hand-written process of finger as writing implement, authenticates the safety problem of bringing because of separate collection apparatus thereby solve prior art.Wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane.Wherein, finger refers to the some and finger that contacts the activity of writing with the finger face with writing plane only of user, right hand forefinger for example.
The technical solution used in the present invention is: a kind of handwriting input device, comprise: fingerprint sensor, display screen and multi-dimension force sensor, wherein, multi-dimension force sensor is positioned at the bottom of display screen, display location is in the top of multi-dimension force sensor, fingerprint sensor places the top of display screen, described fingerprint sensor is used for realizing the fingerprint two-dimensional image information is obtained, multi-dimension force sensor is used for realizing finger is applied to obtaining of writing plane upward pressure information, display screen then is used for realization to the demonstration of hand-written trace information, and presents to the user.
In addition, the present invention also provides a kind of handwritten input information that is applied to described handwriting input device to obtain flow process, and step comprises:
Steps A, under synchronization module control, read simultaneously multi-dimension force sensor and fingerprint sensor data;
Step B, data de-noising;
If step C fingerprint image area then enters next step greater than threshold value, otherwise, jump to steps A, again read multi-dimension force sensor and fingerprint sensor data;
Step D, the fingerprint image data of preserving this sampling instant and multi-dimensional force data;
The data such as step e, the fingerprint image with this sampling instant, multi-dimensional force and timestamp are sent to interface module, jump to A, read next sampling instant data.
A kind of handwriting input equipment that comprises finger information is provided in addition, comprises acquisition of information module, processing module, synchronization module, memory module and display module, wherein:
Acquisition of information module: be used for to realize with the hand-written process of finger as writing implement, obtain in the time of to hand-written handwriting information and finger print image information, wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane;
Processing module: be used for realization the handwritten input information that the acquisition of information module gathers is simultaneously analyzed and processed, specifically comprise digital filtering processing, signal condition analysis, threshold decision and hand-written feature extraction functions;
Synchronization module: be used for providing the work clock function of described handwriting device, provide the synchronizing function that hand-written information is obtained for the acquisition of information module, so that processing module can be judged according to synchronous clock the time series synchronism of handwritten input information;
Memory module: be used for configuration parameter is stored, and need in the processing module that data are carried out dynamical save storage space is provided;
Display module: be used for providing the human-computer interaction interface function, so that the user can in the handwriting input process, watch the information of inputting in real time.
A kind of handwriting input method that comprises finger information is provided in addition, comprises acquisition of information step, treatment step, synchronizing step, storing step and step display, wherein:
Acquisition of information step: be used for to realize with the hand-written process of finger as writing implement, obtain in the time of to hand-written handwriting information and finger print image information, wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane;
Treatment step: be used for realization the handwritten input information that the acquisition of information step gathers is simultaneously analyzed and processed, specifically comprise digital filtering processing, signal condition analysis, threshold decision and hand-written feature extraction functions;
Synchronizing step: be used for providing the work clock function of described handwriting device, provide the synchronizing function that hand-written information is obtained for the acquisition of information step, so that treatment step can be judged according to synchronous clock the time series synchronism of handwritten input information;
Storing step: be used for configuration parameter is stored, and need in the treatment step that data are carried out dynamical save storage space is provided;
Step display: be used for providing the human-computer interaction interface function, so that the user can in the handwriting input process, watch the information of inputting in real time.
As a further improvement of existing technologies, handwriting input device provided by the present invention can realize obtaining in the handwriting information that produces in the writing process of finger as writing implement and the finger print image information, so that the present invention provides useful solution and thinking for existing adversary writes the problem that the independence extraction of biological feature brings.
With respect to prior art, the invention has the beneficial effects as follows: in the writing process of finger as writing implement, the finger print image sequence that handwriting equipment collection finger contacts with writing plane, obtain aquatic weeds handwriting information with which by the center of gravity of calculating every frame fingerprint image, thereby obtain when realizing handwriting and finger print image information.Separate and see, all there are advantages and disadvantages separately in person's handwriting and fingerprint, and the deficiency of certain biological characteristic just in time is another advantage, and for example, there is inter-object distance in person's handwriting and is easily imitated, and there is the live body test problems in fingerprint.In the present invention, two kinds of features are when advantage obtains keeping separately, and deficiency is but overcome each other; The more important thing is, they are gathered simultaneously, and the assailant can't present finger print information when imitating person's handwriting, therefore, use the general safety that multi-biological characteristic that the present invention obtains simultaneously can the Effective Raise Verification System.
Description of drawings
Fig. 1 is the system chart of handwriting input device of the present invention;
Fig. 2 is the composition frame chart of processing module of the present invention;
Fig. 3 is that sensor construction of the present invention is arranged block diagram;
Fig. 4 is that handwritten input information obtains process flow diagram;
Fig. 5 is the ways of writing schematic diagram that comprises the finger print image information;
Fig. 6 is multi-dimension force sensor data acquisition theory diagram;
Fig. 7 is multi-dimension force sensor principles of signal processing block diagram;
Fig. 8 is semiconductor-type capacitive transducer fingerprint collecting theory diagram;
Fig. 9 is semiconductor-type capacitive transducer principles of signal processing block diagram;
Figure 10 is the fingerprint image sequence stack result that handwriting input device obtains;
The handwriting data of Figure 11 for calculating from the fingerprint image sequence;
The information of Figure 12 for obtaining at a certain sampling instant handwriting equipment;
Figure 13 is the directions X pressure information that multi-dimension force sensor obtains;
Figure 14 is the Y-direction pressure information that multi-dimension force sensor obtains;
Figure 15 is the Z directional pressure information that multi-dimension force sensor obtains.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing and specific embodiment.
Fig. 1 is the system chart of handwriting input device of the present invention: comprise synchronization module 1, acquisition of information module 2, processing module 3, memory module 4 and display module 5, wherein:
Acquisition of information module 1: be used for to realize with the writing process of finger as writing implement, obtain in the time of to hand-written handwriting information and finger print image information, wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane;
Processing module 2: be used for realization the handwritten input information that the acquisition of information module gathers is simultaneously analyzed and processed, specifically comprise digital filtering processing, signal condition analysis, threshold decision and hand-written feature extraction functions;
Synchronization module 3: the work clock function that is used for providing described handwriting device, processing module provides the synchronizing function that hand-written information is obtained in particular for the acquisition of information module, so that can be judged according to synchronous clock the time series synchronism of handwritten input information.
Memory module 4: be used for the configuration parameter of apparatus of the present invention is stored, and need in the processing module that data are carried out dynamical save storage space is provided;
Display module 5: be used for providing the human-computer interaction interface function of described contrive equipment, so that the user can in the handwriting input process, watch the handwriting information of inputting in real time.
Fig. 2 is the composition frame chart of processing module of the present invention: comprise three-dimensional pressure information acquisition 21, fingerprint image acquisition 22, analysis module 23 and bus interface module 24; Wherein, three-dimensional pressure information acquisition 21 is used for realizing to being applied to obtaining of three-dimensional pressure data on the writing plane with finger as the hand-written process finger of writing implement, fingerprint image acquisition 22 obtains for the finger print view data that realizes same writing process is contacted with writing plane, analysis module 23 is used for realization to analysis and the processing of above-mentioned hand-written data, specifically comprise the digital filtering processing, the calculating of signal condition analysis and hand-written characteristic, 24 of bus interface modules are exported data to analysis module 23 and are carried out bus driver and initiate the bus data transfer function, to set up the bus data communication link with processing module 3.
Fig. 3 is that sensor construction of the present invention is arranged block diagram: comprise fingerprint sensor S1, display screen S2 and multi-dimension force sensor S3, wherein multi-dimension force sensor S3 is positioned at the bottom of display screen, display screen S2 is positioned at the top of multi-dimension force sensor S3, fingerprint sensor S1 places the top of display screen S2, described fingerprint sensor S1 obtains for the finger print image information that realizes finger is contacted with writing plane, multi-dimension force sensor S3 is used for realizing finger is applied to obtaining of writing plane three-dimensional pressure, display screen S2 then is used for realization to the demonstration of hand-written trace information, and present to the user, especially, fingerprint sensor S1 can realize that maybe components and parts that information in fingerprint is obtained or module or equipment consist of by semiconductor fingerprint sensor or optical fingerprint sensor or ultrasound wave fingerprint sensor, further, the thickness of fingerprint sensor S1 and display screen S2 can design according to application demand, but should not affect multi-dimension force sensor S3 to reception and the calculating of hand-written input trajectory information.
If be subjected to the current techniques condition restriction, the thickness sum of fingerprint sensor S1 and display screen S2 has influence on multi-dimension force sensor S3 to reception and the calculating of hand-written input trajectory information, scheme as inferior choosing, the display screen S2 of the layer that mediates is moved on to other zone of handwriting equipment, fingerprint sensor S1 is directly placed above the aerial array S3.When selecting scheme not affect handwriting information and information in fingerprint, this time gather.
Fig. 4 is that handwritten input information obtains process flow diagram, and concrete steps are as follows:
Step S101: under synchronization module control, read simultaneously multi-dimension force sensor and fingerprint sensor data.
Step S102: data de-noising.
Step S103: if the fingerprint image area greater than threshold value, then enters step S104, otherwise, jump to step S101, again read multi-dimension force sensor and fingerprint sensing data.
Step S104: fingerprint image data and the multi-dimensional force data of preserving this sampling instant
Step S105: the data transfer interface modules such as fingerprint image, multi-dimensional force and timestamp with this sampling instant, jump to step S101, read next sampling instant data.
Described read multi-dimension force sensor and fingerprint sensor data refer to read by information process unit processed respectively by multi-dimensional force data and the finger print view data of multi-dimension force sensor and fingerprint sensor perception.
Fig. 5 is the ways of writing schematic diagram that comprises the finger print image information, and the writer writes at the stable writing plane that handwriting input device provides as writing implement with finger.In writing process, fingerprint sensor S1 obtains the information in fingerprint that finger contacts with writing plane, and simultaneously, multi-dimension force sensor S3 obtains and points the pressure information that is applied on the writing plane, and display screen S2 is used for showing in real time handwriting information.
In the inventive method, multi-dimension force sensor is prior art.The below carries out exemplary illustration to its data acquisition principle and signal processing, so that implement.As shown in Figure 6, when finger is being write arbitrarily a place when writing, finger will be write force information Fx in this point generation three-dimensional, Fy, and Fz, this three-dimensional force information can directly directly be recorded by multi-dimension force sensor.As shown in Figure 7, multi-dimensional force acquisition of information principle is: when pointing when writing plane is write, the power of writing acts on the flexible sheet of sensor by writing plane, so that flexible sheet generation deformation, cause the foil gauge on the diaphragm that same deformation also occurs, multi-dimension force sensor detects dependent variable by the Hui Sitong bridge circuit that foil gauge forms, and by operational amplifier it is amplified, thereafter adopt the filtering of RC filtering circuit, the stabilization signal that obtains is sampled digitizing at the A/D sampling element; Regularly sample the in turn multi-dimensional force information of a plurality of passages of A/D link is carried out solution coupling calculation to the dependent variable of a plurality of passages and is obtained corresponding multi-dimensional force.
In the inventive method, fingerprint sensor is prior art.Existing fingerprint sensor comprises semiconductor image sensor; Optical image sensor; The ultrasonography sensor.The below is take semicoductor capacitor formula fingerprint sensor as example, and offside fingerprint collecting process is carried out exemplary illustration, so that implement.The principle of work of semicoductor capacitor formula fingerprint sensor is as shown in Figure 8: the every bit of sensor array is a metal electrode, a utmost point that serves as capacitor, by the corresponding point of pointing at sensitive face another utmost point as electric capacity, the passivation layer on sensor array surface is as the medium between capacitor the two poles of the earth.Because finger surface ridge and paddy are different with respect to the distance between another utmost point, cause the difference of each capacitance on the capacitor array, measure and record the capacitance of each point, can obtain fingerprint image.Its signal processing module as shown in Figure 9, when finger contact arrives sensor array, because fingerprint texture height difference lists sensor array and obtains different electric capacitys, and then cause magnitudes of voltage different on the two-dimensional array, behind sampling hold circuit, data processor reads the fingerprint image data of the corresponding gray level that is converted to by the A/D change-over circuit.
When Figure 10 has provided the user and has write " book " word with finger at writing plane, the result that the fingerprint image sequence that handwriting input device obtains is superimposed.As shown in figure 11, obtain handwriting sampled point sequence by the center of gravity of calculating every width of cloth fingerprint image.Figure 13,14,15 has provided respectively finger that multi-dimension force sensor obtains simultaneously and has been applied to multi-dimensional force information on the writing plane.The information of obtaining at each sampling instant handwriting equipment as shown in figure 12, comprise that finger that multi-dimension force sensor obtains is applied to three-dimensional pressure and the finger print image information S4 of writing plane, especially, fingerprint image is that a width of cloth is in the fingerprint image of writing in the zone, as shown in figure 12.
The not detailed disclosed part of the present invention belongs to the known technology of this area.
Although the above is described the illustrative embodiment of the present invention; so that the technician of present technique neck understands the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and the spirit and scope of the present invention determined in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (4)
1. handwriting input device, it is characterized in that, comprise: fingerprint sensor, display screen and multi-dimension force sensor, wherein, multi-dimension force sensor is positioned at the bottom of display screen, display location is in the top of multi-dimension force sensor, fingerprint sensor is positioned at the top of display screen, described fingerprint sensor is used for realizing the fingerprint two-dimensional image information is obtained, multi-dimension force sensor is used for realizing finger is applied to obtaining of writing plane upward pressure information, and display screen then is used for realization to the demonstration of hand-written trace information, and presents to the user.
2. the collecting method of a handwriting input device is characterized in that, comprises the steps:
Steps A, under synchronization module control, read simultaneously multi-dimension force sensor and fingerprint sensor data;
Step B, data de-noising;
If step C fingerprint image area then enters next step greater than threshold value, otherwise, jump to steps A, again read multi-dimension force sensor and fingerprint sensor data;
Step D, the fingerprint image data of preserving this sampling instant and multi-dimensional force data;
The data such as step e, the fingerprint image with this sampling instant, multi-dimensional force and timestamp are sent to interface module, jump to A, read next sampling instant data.
3. a handwriting input equipment that comprises finger information is characterized in that, comprises acquisition of information module, processing module, synchronization module, memory module and display module, wherein:
Acquisition of information module: be used for to realize with the hand-written process of finger as writing implement, obtain in the time of to hand-written handwriting information and finger print image information, wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane;
Processing module: be used for realization the handwritten input information that the acquisition of information module gathers is simultaneously analyzed and processed, specifically comprise digital filtering processing, signal condition analysis, threshold decision and hand-written feature extraction functions;
Synchronization module: be used for providing the work clock function of described handwriting device, provide the synchronizing function that hand-written information is obtained for the acquisition of information module, so that processing module can be judged according to synchronous clock the time series synchronism of handwritten input information;
Memory module: be used for configuration parameter is stored, and need in the processing module that data are carried out dynamical save storage space is provided;
Display module: be used for providing the human-computer interaction interface function, so that the user can in the handwriting input process, watch the information of inputting in real time.
4. a handwriting input method that comprises finger information is characterized in that, comprises acquisition of information step, treatment step, synchronizing step, storing step and step display, wherein:
Acquisition of information step: be used for to realize with the hand-written process of finger as writing implement, obtain in the time of to hand-written handwriting information and finger print image information, wherein, handwriting information comprises that the centre of gravity place that contacts with writing plane of finger and focus point place are applied to the pressure on the writing plane;
Treatment step: be used for realization the handwritten input information that the acquisition of information step gathers is simultaneously analyzed and processed, specifically comprise digital filtering processing, signal condition analysis, threshold decision and hand-written feature extraction functions;
Synchronizing step: be used for providing the work clock function of described handwriting device, provide the synchronizing function that hand-written information is obtained for the acquisition of information step, so that treatment step can be judged according to synchronous clock the time series synchronism of handwritten input information;
Storing step: be used for configuration parameter is stored, and need in the treatment step that data are carried out dynamical save storage space is provided;
Step display: be used for providing the human-computer interaction interface function, so that the user can in the handwriting input process, watch the information of inputting in real time.
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| CN112463012A (en) * | 2020-08-11 | 2021-03-09 | 湖北工业大学 | Method for displaying consistency of handwriting in synchronization of paper screen |
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