CN114138166A - Hand-written signature method and terminal - Google Patents
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- 238000007781 pre-processing Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 8
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- 238000012163 sequencing technique Methods 0.000 claims description 3
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- 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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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- G—PHYSICS
- 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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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- G06F3/04886—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
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Abstract
The invention discloses a hand-written signature method and a terminal, wherein the method comprises the following steps: s1: determining an available writing area of the first display screen according to a signature typeface input by a user; s2: judging whether the available writing area can meet the normal input of the next word to be signed; s3: if the signature type cannot be displayed on the second display screen of the signing terminal, the signature type of the first display screen is removed; s4: and writing a to-be-signed typeface on the first display screen by a user, wherein the first display screen is arranged above the second display screen. According to the technical scheme, the first display screen and the second display screen jointly guarantee that a user can have enough writing areas during writing, and writing deformation and deformation caused by insufficient space of writing of the user can be avoided.
Description
Technical Field
The invention relates to the technical field of handwritten signatures, in particular to a handwritten signature method and a terminal.
Background
Because the information signed on the paper is not beneficial to unified preservation and management, at present, the traditional paper signing mode is replaced by the electronic signing mode in office places such as government affairs service, finance, vehicle management and the like, for example, in the business handling of bank deposit, the electronic signature confirmation is often required to be carried out by individuals. However, at present, the signature information input by the user through the electronic signature device does not verify the authenticity of the signer, and the user in the signature easily takes too much space when the writing of the pre-sequence typeface is large, so that the writing deformation or the aliasing of the subsequent typeface is caused, the real signature track of the user cannot be accurately obtained, and the user experience is poor. And the signature matching is possibly inaccurate, so that the identity authentication is wrong.
Disclosure of Invention
The invention aims to provide a handwritten signature method and a terminal, and aims to solve the problems that a writing track is distorted and deformed due to insufficient writing area in a signature process, and handwriting information of a user cannot be truly reproduced.
In a first aspect, a method for handwritten signature is provided, which includes:
s1: determining an available writing area of the first display screen according to a signature typeface input by a user;
s2: judging whether the available writing area can meet the normal input of the next word to be signed;
s3: if not, displaying the input signature typeface on a second display screen of the signing terminal, and clearing the signature typeface input by the first display screen;
s4: and writing a to-be-signed typeface on the first display screen by a user, wherein the first display screen is arranged above the second display screen.
Further, the step S1 specifically includes:
acquiring a writing track of a signature typeface input by a user;
determining the writing direction of a user according to the input signature typeface and/or the character information in the signed document, drawing a longitudinal straight line passing through the extreme point coordinate at the rightmost side of the writing track of the signature typeface when the writing direction is from left to right, and taking a writing area on the right side of the longitudinal straight line as an available writing area;
and when the writing direction is from top to bottom, drawing a transverse straight line passing through the coordinate of the lowest endpoint of the writing track of the signature typeface, and taking a writing area below the transverse straight line as an available writing area.
Further, the step S2 specifically includes:
predicting the writing requirement of the next word to be signed according to the input signature word and the pre-stored signature;
judging whether the available writing area can meet the writing requirement or not according to the size of the available writing area;
and if so, determining that the available writing area can meet the normal input of the next character to be signed.
Further, the signature typeface that has been input in the step S3 is displayed in a blurred manner on the second display screen.
Further, still include: and after the signature typeface is input, sequencing, integrating and zooming all the signature typefaces to form a complete signature, and displaying the complete signature on the first display screen or the second display screen.
Further, still include: and after the signature typeface is input, verifying whether the signature input by the user is a legal signature, and if so, storing the signature and the signature document in a correlation manner.
Further, the verifying whether the signature input by the user is a legal signature specifically includes:
acquiring attribute information of each signature character and a pre-stored sample character, wherein the attribute information comprises signature coordinates, time and pressure information corresponding to each sampling point;
b, preprocessing, namely placing the signature typeface and the corresponding sample typeface under the same coordinate system according to the signature coordinates of the signature typeface, and respectively setting a first preprocessing datum point of each signature typeface and a second preprocessing datum point of the sample typeface; subtracting the coordinate of the first preprocessing reference point from the signature coordinate of the signature typeface to obtain a first signature coordinate, and subtracting the corresponding coordinate of the second preprocessing reference point from the signature coordinate of the sample typeface to obtain a first sample coordinate;
wherein the coordinates (x) of the first preprocessing reference point0,y0) Satisfy x0≤xmin,y0≤ymin,xmin,yminRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinates of the signature typeface;
coordinates of a second pre-processing reference point(x′0,y′0) X'0≤x′min,y′0≤y′min,x′min,y′minRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinate of the sample typeface;
normalizing the first signature coordinate and the first sample coordinate according to the following formula to obtain a second signature coordinate and a second sample coordinate, namely:
wherein, x (t) ', y (t)' are x-axis coordinate, y-axis coordinate, x-axis coordinate of the normalized second signature coordinatet、ytAn x-axis coordinate and a y-axis coordinate of the first signature coordinate, respectively;
x (t ') and y (t') are respectively the x-axis coordinate, y-axis coordinate and x 'of the normalized second sample coordinate't、y'tThe x-axis coordinate and the y-axis coordinate of the first sample coordinate, respectively.
Generating reconstruction attribute information of each sampling point of the signature typeface and the sample typeface, and comparing the signature typeface with the sample typeface by adopting a DTW (dynamic time warping) algorithm according to the reconstruction attribute information to obtain a similarity value between the signature typeface and the sample typeface; the reconstruction attribute information of the signature typeface comprises second signature coordinates, time and pressure information; the reconstruction attribute information of the sample typeface comprises second sample coordinate, time and pressure information;
e, judging whether the similarity value is larger than a preset threshold value or not, and if so, judging that the similarity value is false; if not, it is true.
In a second aspect, a handwritten signature terminal is provided, which includes a first display screen, a second display screen, a determining module, a judging module and a processing module;
the first display screen comprises a writing area for writing a signature typeface;
the determining module is used for determining an available writing area of the first display screen according to the inputted writing track of the signature typeface;
the judging module is used for judging whether the available writing area can meet the normal input of the next word to be signed;
the second display screen is used for displaying the signature typeface input in the first display screen when the available writing area cannot meet the normal input of the next to-be-signed typeface;
the processing module is used for clearing the signature typeface input in the first display screen;
wherein the first display screen is above the second display screen.
Compared with the prior art, the invention has the following technical effects: in the signing process of a user, an available writing area of a first display screen is determined according to an input signature typeface; when the available writing area can not meet the normal input of the next word to be signed, displaying the input signature word on a second display screen of the signing terminal, and clearing the signature word input by a first display screen; the user can write a to-be-signed typeface on the first display screen, normal input of the user cannot be influenced due to insufficient available writing areas, the signature typeface is displayed on the second display screen, writing reference can be provided for the user to input the next to-be-signed typeface on the first display screen again, and the fact that various typefaces input by the user can be matched in a coordinated mode is guaranteed.
Drawings
FIG. 1 is a flow chart diagram of a method of handwritten signatures;
fig. 2 is a schematic structural diagram of a handwritten signature terminal.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the present embodiment discloses a method for handwritten signature, which includes:
s1: determining an available writing area of the first display screen according to a signature typeface input by a user; in the embodiment of the invention, a user inputs a signature character through a handwriting signature terminal, and the handwriting signature terminal is provided with a first display screen supporting handwriting input and a second display screen with a display function.
In the embodiment of the present invention, a method for determining an available writing area of a first display screen specifically includes:
a: acquiring a writing track of a signature typeface input by a user; and the first display screen can record and display a writing track.
B: determining the writing direction of a user according to the input signature typeface and/or the character information in the signed document, drawing a longitudinal straight line passing through the extreme point coordinate at the rightmost side of the writing track of the signature typeface when the writing direction is from left to right, and taking a writing area on the right side of the longitudinal straight line as an available writing area; assuming that the input signature typeface comprises two typefaces, the writing direction of the user can be determined according to the writing sequence and the positions of the two typefaces; when the input signature typeface only comprises one typeface, and the signature of the user is an approval signature carried out on a certain approved document, the writing direction of the user can be determined according to the character information in the approved document, for example, the character information in the approved document comprises two characters of 'name', and the writing direction of the two characters of 'name' is determined as the writing direction of the user. In the embodiment of the invention, because the habit of writing a signature is generally from left to right, the left to right is taken as the default writing direction, and when one signature typeface is input and no character information exists in a signed document, the default writing direction is taken as the writing direction of a user.
C: and when the writing direction is from top to bottom, drawing a transverse straight line passing through the coordinate of the lowest endpoint of the writing track of the signature typeface, and taking a writing area below the transverse straight line as an available writing area.
S2: judging whether the available writing area can meet the normal input of the next word to be signed; the method specifically comprises the following steps:
predicting the writing requirement of the next word to be signed according to the input signature word and the pre-stored signature; in the embodiment of the invention, the pre-stored signature of the user is stored in the signature terminal, comparison operation is carried out according to the occupation width of the writing direction of each signature character in the pre-stored signature and the occupation width of the writing direction of each character in the inputted signature character, the writing requirement width of the next character to be signed in the writing direction is determined, and the writing requirement width in the writing direction is recorded as the writing requirement.
Judging whether the available writing area can meet the writing requirement or not according to the size of the available writing area; the width of writing the region according to available is compared with writing demand width, when the width in available writing region is greater than when writing the demand width, judge as can satisfy and write the demand.
And if so, determining that the available writing area can meet the normal input of the next character to be signed.
S3: if not, displaying the input signature typeface on a second display screen of the signing terminal, and clearing the signature typeface input by the first display screen;
in the embodiment of the invention, the first display screen is transparent, and a user can see the input signature typeface displayed by the second display screen through the first display screen. Preferably, the input signature typeface of the invention is displayed in the second display screen in a fuzzy way, so that the user can not be greatly disturbed by the input typeface in the second display screen in the visual angle when writing on the first display screen, for example, the input signature typeface in the second display screen can be displayed in a fuzzy way by changing the displayed color shade.
S4: and writing a to-be-signed typeface on the first display screen by a user, wherein the first display screen is arranged above the second display screen. In the embodiment of the invention, the handwritten signature terminal is of a double-layer display structure comprising a first display screen and a second display screen, the first display screen has writing input and display functions, a user can directly contact the first display screen and complete writing operation, and the second display screen is arranged below the first display screen and has a display function.
In the embodiment of the invention, the method further comprises the following steps: after the signature typefaces are input, all the signature typefaces are subjected to sequencing integration and zooming processing to form a complete signature, the complete signature is displayed on a first display screen or a second display screen, the multiple signed typefaces are integrated to form the complete signature for a user to check, and the user experience is good.
In the actual use process of the hand-written signature terminal, signatures are mostly used when a user needs to confirm or approve certain document information, the user identity is often required to be verified, and after the verification is successful, the document information is confirmed or approved. At this time, the user signature needs to be verified, that is: and after the signature typeface is input, verifying whether the signature input by the user is a legal signature, and if so, storing the signature and the signature document in a correlation manner. The verifying whether the signature input by the user is a legal signature specifically includes:
the verifying whether the signature input by the user is a legal signature specifically includes:
acquiring attribute information of each signature character and a pre-stored sample character, wherein the attribute information comprises signature coordinates, time and pressure information corresponding to each sampling point;
b, preprocessing, namely placing the signature typeface and the corresponding sample typeface under the same coordinate system according to the signature coordinates of the signature typeface, and respectively setting a first preprocessing datum point of each signature typeface and a second preprocessing datum point of the sample typeface; subtracting the coordinate of the first preprocessing reference point from the signature coordinate of the signature typeface to obtain a first signature coordinate, and subtracting the corresponding coordinate of the second preprocessing reference point from the signature coordinate of the sample typeface to obtain a first sample coordinate;
wherein the coordinates (x) of the first preprocessing reference point0,y0) Satisfy x0≤xmin,y0≤ymin,xmin,yminRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinates of the signature typeface;
coordinates (x ') of a second preprocessing reference point'0,y′0) X'0≤x′min,y′0≤y′min,x′min,y′minRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinate of the sample typeface;
normalizing the first signature coordinate and the first sample coordinate according to the following formula to obtain a second signature coordinate and a second sample coordinate, namely:
wherein, x (t) ', y (t)' are x-axis coordinate, y-axis coordinate, x-axis coordinate of the normalized second signature coordinatet、ytAn x-axis coordinate and a y-axis coordinate of the first signature coordinate, respectively;
x (t ') and y (t') are respectively the x-axis coordinate, y-axis coordinate and x 'of the normalized second sample coordinate't、y'tThe x-axis coordinate and the y-axis coordinate of the first sample coordinate, respectively.
Generating reconstruction attribute information of each sampling point of the signature typeface and the sample typeface, and comparing the signature typeface with the sample typeface by adopting a DTW (dynamic time warping) algorithm according to the reconstruction attribute information to obtain a similarity value between the signature typeface and the sample typeface; the reconstruction attribute information of the signature typeface comprises second signature coordinates, time and pressure information; the reconstructed attribute information of the sample typeface includes second sample coordinates, time, and pressure information.
In the embodiment of the invention, a signature typeface S and a sample typeface T are set, the sampling frequency of the signature typeface S and the sample typeface T is the same, wherein S ═ S (S)1,s2,…,sn),T＝(t1,t2,…tm),s1,s2,…,snThe nth points of the 1 st, 2 nd and … th point sequences corresponding to the signature typeface are referred; t is t1,t2,…tmThe m points of the point sequence corresponding to the sample typeface are 1 st, 2 nd and … th points; the goal of signature sequence data matching is to find an optimal point-to-point correspondence that minimizes the cumulative difference between two samples. To find such point-to-point alignment, an n × m matrix is defined, and the element (i, j) of the matrix records the sampling point s of the signature patterniAnd sample typefaceSampling point tjThe Euclidean distance between the two groups is calculated according to the reconstruction attribute information. Find a path W from (1,2) to (n, m) ═ W1,w2,…,wk) Where max (n, m)<k<n + m, so that the sum of the elements on the path is minimized, and the minimum is recorded as the similarity value between the signature typeface and the sample typeface.
E, judging whether the similarity value is larger than a preset threshold value or not, and if so, judging that the similarity value is false; if not, it is true.
Example 2
The embodiment of the invention provides a handwritten signature terminal, which comprises a first display screen 1, a second display screen 2, a determining module 3, a judging module 4 and a processing module 5, as shown in fig. 2;
the first display screen 1 comprises a writing area for writing a signature typeface;
the determining module 3 is configured to determine an available writing area of the first display screen 1 according to the writing track of the signature typeface;
the judging module 4 is used for judging whether the available writing area can meet the normal input of the next word to be signed;
the second display screen 2 is used for replacing the first display screen 1 to display the signature typeface when the available writing area cannot meet the normal input of the next to-be-signed typeface;
the processing module 5 is configured to clear the signature typeface input in the first display screen;
wherein the first display screen 1 is above the second display screen 2.
The handwriting signature terminal of the technical scheme of the invention is internally provided with a software program used for realizing the functions of the determining module 3, the judging module 4 and the processing module 5.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for handwritten signatures, comprising:
s1: determining an available writing area of the first display screen according to a signature typeface input by a user;
s2: judging whether the available writing area can meet the normal input of the next word to be signed;
s3: if not, displaying the input signature typeface on a second display screen of the signing terminal, and clearing the signature typeface input by the first display screen;
s4: and writing a to-be-signed typeface on the first display screen by a user, wherein the first display screen is arranged above the second display screen.
2. The method for handwritten signature as claimed in claim 1, wherein said step S1 specifically includes:
acquiring a writing track of a signature typeface input by a user;
determining the writing direction of a user according to the input signature typeface and/or the character information in the signed document, drawing a longitudinal straight line passing through the extreme point coordinate at the rightmost side of the writing track of the signature typeface when the writing direction is from left to right, and taking a writing area on the right side of the longitudinal straight line as an available writing area;
and when the writing direction is from top to bottom, drawing a transverse straight line passing through the coordinate of the lowest endpoint of the writing track of the signature typeface, and taking a writing area below the transverse straight line as an available writing area.
3. The method for handwritten signature as claimed in claim 1, wherein said step S2 specifically includes:
predicting the writing requirement of the next word to be signed according to the input signature word and the pre-stored signature;
judging whether the available writing area can meet the writing requirement or not according to the size of the available writing area;
and if so, determining that the available writing area can meet the normal input of the next character to be signed.
4. The handwritten signature method as claimed in claim 1, wherein the signature typeface that has been input in step S3 is displayed in a blurred manner on the second display screen.
5. The method for handwritten signature according to claim 1, further comprising: and after the signature typeface is input, sequencing, integrating and zooming all the signature typefaces to form a complete signature, and displaying the complete signature on the first display screen or the second display screen.
6. The method for handwritten signature according to claim 1, further comprising: and after the signature typeface is input, verifying whether the signature input by the user is a legal signature, and if so, storing the signature and the signature document in a correlation manner.
7. The method for handwritten signature according to claim 6, wherein said verifying whether the signature inputted by the user is a legal signature includes:
acquiring attribute information of each signature character and a pre-stored sample character, wherein the attribute information comprises signature coordinates, time and pressure information corresponding to each sampling point;
b, preprocessing, namely placing the signature typeface and the corresponding sample typeface under the same coordinate system according to the signature coordinates of the signature typeface, and respectively setting a first preprocessing datum point of each signature typeface and a second preprocessing datum point of the sample typeface; subtracting the coordinate of the first preprocessing reference point from the signature coordinate of the signature typeface to obtain a first signature coordinate, and subtracting the corresponding coordinate of the second preprocessing reference point from the signature coordinate of the sample typeface to obtain a first sample coordinate;
wherein the coordinates (x) of the first preprocessing reference point0,y0) Satisfy x0≤xmin,y0≤ymin,xmin,yminRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinates of the signature typeface;
coordinates (x ') of a second preprocessing reference point'0,y′0) X'0≤x′min,y′0≤y′min,x′min,y′minRespectively is the minimum value of the x-axis coordinate and the y-axis coordinate in the signature coordinate of the sample typeface;
normalizing the first signature coordinate and the first sample coordinate according to the following formula to obtain a second signature coordinate and a second sample coordinate, namely:
wherein, x (t) ', y (t)' are x-axis coordinate, y-axis coordinate, x-axis coordinate of the normalized second signature coordinatet、ytAn x-axis coordinate and a y-axis coordinate of the first signature coordinate, respectively;
x (t ') and y (t') are respectively the x-axis coordinate, y-axis coordinate and x 'of the normalized second sample coordinate't、y'tThe x-axis coordinate and the y-axis coordinate of the first sample coordinate, respectively.
Generating reconstruction attribute information of each sampling point of the signature typeface and the sample typeface, and comparing the signature typeface with the sample typeface by adopting a DTW (dynamic time warping) algorithm according to the reconstruction attribute information to obtain a similarity value between the signature typeface and the sample typeface; the reconstruction attribute information of the signature typeface comprises second signature coordinates, time and pressure information; the reconstruction attribute information of the sample typeface comprises second sample coordinate, time and pressure information;
e, judging whether the similarity value is larger than a preset threshold value or not, and if so, judging that the similarity value is false; if not, it is true.
8. A hand-written signature terminal is characterized by comprising a first display screen, a second display screen, a determining module, a judging module and a processing module;
the first display screen comprises a writing area for writing a signature typeface;
the determining module is used for determining an available writing area of the first display screen according to the inputted writing track of the signature typeface;
the judging module is used for judging whether the available writing area can meet the normal input of the next word to be signed;
the second display screen is used for displaying the signature typeface input in the first display screen when the available writing area cannot meet the normal input of the next to-be-signed typeface;
the processing module is used for clearing the signature typeface input in the first display screen;
wherein the first display screen is above the second display screen.
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