CN114035706A - Touch screen finger characteristic analysis method, device, equipment and storage medium - Google Patents
Touch screen finger characteristic analysis method, device, equipment and storage medium Download PDFInfo
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Abstract
The application provides a method, a device, equipment and a storage medium for analyzing characteristics of a touch screen finger, wherein the method comprises the following steps: determining a finger touch area according to the touch induction quantity of each induction point; acquiring sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area; determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the sensing points and the constructed second-order Gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity. According to the technical scheme, the pressing direction and range of the touch screen finger can be calculated only by means of the touch screen data acquired by the screen without depending on other external hardware for auxiliary judgment.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a touch screen finger characteristic analysis method and device, electronic equipment, a computer readable storage medium and a touch device.
Background
With the development of science and technology, touch screen recognition has become one of the commonly used interaction modes of various electronic devices, and a user can operate on the touch screen of the electronic device by using a finger to control the electronic device, so that the electronic device is very convenient and fast. In the prior art, it is usually necessary to locate the touch direction of a finger by means of external hardware, for example, a fingerprint acquisition device is disposed under a screen, or a handheld manner of a user is determined by light sensing modules disposed at two sides of a terminal, or the touch direction of the finger is determined by a position relationship and a difference between the uppermost point and the lowermost point of touch screen data.
In the prior art, the method for judging and analyzing the direction and the range of the finger needs to set external hardware or collect effective data of a touch area, so that the method has certain limitation and needs to pay extra cost.
Disclosure of Invention
The embodiment of the application provides a method and a device for analyzing characteristics of a touch screen finger, an electronic device and a storage medium, and provides a method for calculating the pressing direction and range of the touch screen finger only by means of touch screen data acquired by a screen without relying on other external hardware for auxiliary judgment.
In a first aspect, an embodiment of the present application provides a method for analyzing characteristics of a finger on a touch screen, including: determining a finger touch area according to the touch induction quantity of each induction point; acquiring sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area; determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the sensing points and the constructed second-order Gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity.
In an embodiment, the determining the finger touch area according to the touch sensing amount of each sensing point includes: and if the touch induction quantity of the induction points in a certain area is greater than that of the peripheral induction points, determining that the area is a finger touch area.
In an embodiment, the obtaining the sensing point positions and the touch sensing quantities of the plurality of sensing points in the finger touch area includes: and acquiring the sensing point positions and touch sensing quantities of at least six sensing points in the finger touch area.
In an embodiment, the obtaining the sensing point positions and the touch sensing quantities of at least six sensing points in the finger touch area includes: acquiring the position of the sensing point with the maximum touch sensing quantity in the finger touch area and the corresponding touch sensing quantity; searching at least five adjacent induction points in a preset range of the induction point position with the maximum touch induction quantity; and acquiring the sensing point position and the corresponding touch sensing quantity of each adjacent sensing point.
In one embodiment, the second order gaussian function is:
wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
In an embodiment, the determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantities of the sensing points and the constructed second-order gaussian function includes: and substituting the induction point positions and the touch induction quantity of at least six induction points into the second-order Gaussian function, and calculating the center point coordinate, the direction included angle and the axial length of the finger touch area.
In an embodiment, after the calculating the coordinates of the center point, the direction angle and the axial length of the finger touch area, the method further includes: and constructing an elliptical finger pressing range according to the center point coordinate, the direction included angle and the axial length.
A second aspect of the present application provides an apparatus for analyzing characteristics of a finger on a touch screen, where the apparatus includes: the area determining module is used for determining a finger touch area according to the touch induction quantity of each induction point; the data acquisition module is used for acquiring the sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area; the characteristic analysis module is used for determining the touch orientation characteristic of the finger touch area according to the induction point positions and the touch induction quantity of the multiple induction points and the constructed second-order Gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity.
In one embodiment, the second order gaussian function is:
wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
In an embodiment, the data obtaining module is configured to obtain sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area.
A third aspect of embodiments of the present application provides an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to perform the method of the first aspect of the embodiments of the present application and any of the embodiments thereof.
A fourth aspect of embodiments of the present application provides a computer-readable storage medium, which stores a computer program, the computer program being executable by a processor to perform the method of the first aspect of embodiments of the present application and any embodiment thereof.
An embodiment of the present application further provides a touch device, where the touch device includes:
a touch panel;
the touch control circuit is connected with the touch control panel and used for executing the touch screen finger characteristic analysis method.
According to the technical scheme provided by the embodiment of the application, the positions and the touch induction quantity of the induction points in the finger touch area can be obtained; and determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the sensing points and the constructed second-order Gaussian function, so that the touch direction of the finger can be quickly known.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a touch device according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a method for analyzing characteristics of a touch screen finger according to an embodiment of the present disclosure;
fig. 4 is a schematic flowchart of a method for analyzing characteristics of a touch screen finger according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an apparatus for analyzing characteristics of a touch-screen finger according to an embodiment of the present application.
Detailed Description
In the description of the present application, the terms "first," "second," and the like are used for distinguishing between descriptions and do not denote an order of magnitude, nor are they to be construed as indicating or implying relative importance.
In the description of the present application, the terms "comprises," "comprising," and/or the like, 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, steps, operations, elements, components, and/or groups thereof.
In the description of the present application, the terms "mounted," "disposed," "provided," "connected," and "configured" are to be construed broadly unless expressly stated or limited otherwise. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be internal to two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, a schematic structural diagram of an electronic device 100 according to an embodiment of the present application is shown, where the electronic device 100 may be used to execute a method for opening an in-application debugging tool according to the embodiment of the present application. The electronic apparatus 100 includes: at least one processor 103, at least one memory 102, and a bus 101, the bus 101 being used to enable connected communication of these components. The electronic device 100 may be a mobile terminal, such as a tablet computer, a smart phone, and the like.
In one embodiment, the Memory 102 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, including but not limited to, a Random Access Memory (RAM) 102, a Read Only Memory (ROM) 102, a Static Random Access Memory (SRAM) 102, a Programmable Read Only Memory (PROM) 102, an Erasable Read Only Memory (EPROM) 102, and an electrically Erasable Read Only Memory (EEPROM) 102.
In one embodiment, the Processor 103 may be a general-purpose Processor 103, including but not limited to a Central Processing Unit (CPU) 103, a Network Processor 103 (NP), etc., a Digital Signal Processor (DSP) 103, 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. The general purpose processor 103 may be a microprocessor 103 or the processor 103 may be any conventional processor 103 or the like, the processor 103 being the control center of the electronic device 100 and the various parts of the entire electronic device 100 being connected by various interfaces and lines. The processor 103 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application.
In an embodiment, fig. 1 illustrates a processor 103 and a memory 102, the processor 103 and the memory 102 are connected via a bus 101, and the memory 102 stores instructions executable by the processor 103, and the instructions are executed by the processor 103, so that the electronic device 100 can perform all or part of the processes of the methods in the following embodiments to implement analysis of characteristics of a touch-screen finger.
The electronic equipment can be equipment such as a smart television, a smart phone, a tablet computer, a notebook computer, an access control device, a card punching device and an intelligent bracelet.
An embodiment of the present application further provides a storage medium, including: the program, when executed by the electronic device 100, enables the electronic device 100 to perform all or part of the processes of the method in the above embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory 102(Flash Memory), a Hard Disk Drive (Hard Disk Drive, abbreviated as HDD), a Solid State Drive (SSD), or the like. The storage medium may also include a combination of memories 102 of the sort described above.
Fig. 2 is a schematic structural diagram of a touch device according to an embodiment of the present disclosure. As shown in fig. 2, the touch device 1 includes: a touch panel 11 and a touch circuit 12 connected to the touch panel 11. And the touch circuit 12 can execute the method for analyzing the touch screen finger characteristics provided by the embodiment of the present application to determine the direction characteristics of the finger touch under the condition that the finger touches the touch panel 11. Fig. 2 is not intended to show the structure of the touch panel 11, but is intended to exemplarily show that the touch panel 11 includes a plurality of sensors 111 (which may also be referred to as a plurality of sensing points). In other embodiments, the touch panel 11 can be a capacitive touch panel, a resistive touch panel, a pressure touch panel, an optical touch panel, or an acoustic touch panel.
Referring to fig. 3, which is a flowchart illustrating a method for analyzing characteristics of a touch-screen finger according to an embodiment of the present application, where the method is executed by the electronic device 100 shown in fig. 1, and the method includes S210-S230.
S210: and determining a finger touch area according to the touch induction quantity of each induction point.
In an embodiment, if the touch sensing amount of the sensing point in a certain area is greater than the touch sensing amount of the sensing points around the certain area, the area is determined to be the finger touch area.
Specifically, a sensor is arranged below a touch screen of the electronic device, when a user performs a touch operation on the touch screen of the electronic device, a touch area is generated, the sensor under the touch screen of the touch area generates a touch sensing amount larger than a non-touch area, a difference value is obtained by subtracting the sensing amount before touch from the sensing amount after touch, and the difference value is called a sensing variation. Generally, the closer to the center of the touch area, the larger the sensing variation, and the closer to the edge of the touch area, the smaller the sensing variation. Here, the region where the sensing variation exists is determined as a finger touch region.
S220: and acquiring the sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area.
In one embodiment, the position of the sensing point and the touch sensing amount of at least 6 sensing points can be obtained.
Specifically, in step S210, the finger touch area is determined, each point in the finger touch area has an induction variation, and a point with the maximum induction variation, that is, a point with the maximum touch induction amount is selected to obtain the position coordinate of the point. And at least five induction points are selected at the upper, lower, left and right sides of the point, and the coordinates of the induction points and the generated touch induction quantity are obtained. Thereby determining the sensing point position and the touch sensing quantity of at least six sensing points.
In another embodiment, the sensing point position and the touch sensing amount of at least six points with the largest touch sensing amount may also be obtained.
As shown in table 1 below, the positions of the sensing points and the touch sensing amounts of the sensing points are shown. The sensing point position is the position with the maximum touch sensing amount of coordinates (18, 9), and the touch sensing amount reaches 901.
TABLE 1
| x | y | Induction quantity Ixy |
| 16 | 9 | 678 |
| 16 | 10 | 778 |
| 16 | 11 | 506 |
| 17 | 8 | 606 |
| 17 | 9 | 884 |
| 17 | 10 | 807 |
| 17 | 11 | 453 |
| 18 | 8 | 678 |
| 18 | 9 | 901 |
| 18 | 10 | 677 |
S230: and determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the plurality of sensing points and the constructed second-order Gaussian function.
Specifically, the second order gaussian function is used to represent a relationship between the sensing point position and the touch sensing amount, and an equation of the second order gaussian function is as follows:
wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
In S220, the position information and the touch sensing amount of at least six sensing points have been acquired, i.e. the I of at least six sensing points is knownxyAnd point coordinates (x, y), so that the second-order Gaussian equation can be solved, and the center point coordinate (x) of the finger touch area is obtained0，y0) Axial length w of the oval finger touch areaxAnd wyAnd 6 data such as a direction included angle theta between the long axis of the oval finger touch area and the horizontal direction and an amplitude A.
After the at least 6 effective data are obtained, the finger touch area and the touch orientation characteristic of the area can be fitted.
The method does not need to rely on external hardware and acquire information of all touch points in the touch area, is more convenient compared with the prior art, and can be widely applied to various electronic devices.
Referring to fig. 4, which is a flowchart illustrating a method for analyzing characteristics of a touch-screen finger according to an embodiment of the present application, where the method is executed by the electronic device 100 shown in fig. 1, and the method includes S310-S370.
S310: and determining a finger touch area according to the touch induction quantity of each induction point.
S310 is similar to S210 in the above embodiment, and refer to the description in the above embodiment in detail, which is not repeated herein.
S320: and acquiring the position of the sensing point with the maximum touch sensing quantity in the finger touch area and the corresponding touch sensing quantity.
Since the finger touch area is determined, sensing variation exists at each point of the finger touch area, a point with the largest sensing variation in the finger touch area, namely the point with the largest touch sensing amount, is selected, and the position information of the point is obtained, wherein the position information comprises the coordinates (x, y) of the point.
S330: and searching at least five adjacent induction points in a preset range of the induction point position with the maximum touch induction quantity.
S340: and acquiring the sensing point position and the corresponding touch sensing quantity of each adjacent sensing point.
In S320, the coordinates of the point in the finger touch area where the touch sensitivity is the largest are determined, at least five points with larger touch sensitivity are selected from the top, bottom, left and right of the point, and the touch sensitivity and the position coordinate information of the sensing points are recorded.
S350: and substituting the induction point positions and the touch induction quantity of at least six induction points into the constructed second-order Gaussian function.
S360: and calculating the coordinates of the central point, the direction included angle and the axial length of the finger touch area.
Specifically, the second order gaussian function is used to represent a relationship between the sensing point position and the touch sensing amount, and an equation of the second order gaussian function is as follows:
wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
Separating the variables from the above equation to obtain:
namely, it is
The above can be further converted into a matrix equation (or vector equation) according to the principle of linear algebra: a. theN×1＝BN×6C6×1. Wherein A isN×1An Nx 1 matrix composed of touch sensing quantities using N sensing points (i.e., N of the ln Ixy) And C is6×1A 6 x 1 matrix of 6 parameters (i.e., C)1、C2、C3、C4、C5And C6). And corresponds to C1、C2、C3、C4、C5And C6) It is understood that BN×6To utilize
xN、
yN、xNyNAnd an N x 6 matrix of 1. In more detail, 6 of the parameters are respectively C1、C2、C3、C4、C5And C6And are respectively represented by 6 mathematical expressions as follows:
and solving 6 parameters by using an inverse matrix algorithm and N touch induction quantities, and calculating a centrifugal angle, a long axis and a short axis of the finger touch screen area by using the 6 parameters, so as to determine the pointing direction of the finger touch screen. In more detail, the operation process of the inverse matrix algorithm is as follows:
it is worth noting that common inverse matrix algorithms (i.e., matrix inversion) require that the matrix itself be invertible (i.e., the matrix must be a non-singular matrix). However, in practical applications, when matrix inversion is required, there often exists an irreversible non-square matrix (i.e., singular matrix) in the matrix equation. However, matrix inversion of singular/nonsingular matrices can be achieved using the algorithmic process of the inverse matrix algorithm as shown above.
Since N of the ln IxyAnd
xN、
yN、xNyNall are from N touch-sensitive quantities (refer to Table (1) above), so that the inverse matrix algorithm and N touch-sensitive quantities can be usedTo solve 6 of said parameters C1、C2、C3、C4、C5And C6. Further, the eccentricity angle, major axis, and minor axis of the finger touch screen area (i.e., elliptical area) may be calculated using several equations as follows:
for example, using the data in Table (1), a calculation can be made that includes 6 parameters (i.e., C) as shown in Table (2) below1、C2、C3、C4、C5And C6) The matrix C6×1。
Watch (2)
Subsequently, using the data of table (2) and equation (1) above, the centrifugal angle θ can be calculated as 28.1395. The minor axis Wx can be calculated as 2.4348 using the data in table (2) and equation (2). Further, the major axis Wy can be calculated as 1.2961 using the data in table (2) and equation (3) above. Finally, after all the basic parameters of the finger touch screen area (i.e., the elliptical area) are obtained, a finger touch direction can be determined.
S370: and constructing an elliptical finger pressing range according to the center point coordinate, the direction included angle and the axial length.
By the center point coordinate (x) solved in S3600，y0) Axial length w of the oval finger touch areaxAnd wyAnd fitting an elliptical touch screen finger shape according to a direction included angle theta between the long axis of the elliptical finger touch area and the horizontal direction, and determining the orientation of the touch screen finger according to the recurrent pattern.
In this embodiment, the finger-pressing shape is assumed to be an oval shape, and there are other specific methods corresponding to finger-pressing shapes of other shapes.
Referring to fig. 5, which is a schematic structural diagram of an apparatus 400 for analyzing characteristics of a touch screen finger according to an embodiment of the present application, the apparatus 400 includes: the area determining module 410 is configured to determine a finger touch area according to the touch sensing amount of each sensing point; the data acquisition module 420 is configured to acquire sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area; the characteristic analysis module 430 is configured to determine a touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantities of the multiple sensing points and the constructed second-order gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity.
In one embodiment, the second order gaussian function is:
x′＝(x-x0)cosθ-(y-y0)sinθ
wherein y ═ x-x0)sinθ+(y-y0)cosθ
Wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
In an embodiment, the data obtaining module 420 is specifically configured to obtain sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area.
For a detailed description of the apparatus 400 for analyzing characteristics of a touch-screen finger, please refer to the description of the related method steps in the above embodiments, which is not repeated herein.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In the embodiments provided in the present application, the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (13)
1. A method for analyzing characteristics of a finger of a touch screen is characterized by comprising the following steps:
determining a finger touch area according to the touch induction quantity of each induction point;
acquiring sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area;
determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the sensing points and the constructed second-order Gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity.
2. The method according to claim 1, wherein the determining the finger touch area according to the touch sensing amount of each sensing point comprises:
and if the touch induction quantity of the induction points in a certain area is greater than that of the peripheral induction points, determining that the area is a finger touch area.
3. The method of claim 1, wherein the obtaining of the sensing point position and the touch sensing amount of the plurality of sensing points in the finger touch area comprises:
and acquiring the sensing point positions and touch sensing quantities of at least six sensing points in the finger touch area.
4. The method of claim 3, wherein the obtaining of the sensing point position and the touch sensing amount of at least six sensing points in the finger touch area comprises:
acquiring the position of the sensing point with the maximum touch sensing quantity in the finger touch area and the corresponding touch sensing quantity;
searching at least five adjacent induction points in a preset range of the induction point position with the maximum touch induction quantity;
and acquiring the sensing point position and the corresponding touch sensing quantity of each adjacent sensing point.
5. The method of claim 1, wherein the second order gaussian function is:
x′＝(x-x0)cosθ-(y-y0)sinθ
wherein y ═ x-x0)sinθ+(y-y0)cosθ
Wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
6. The method of claim 1, wherein determining the touch orientation characteristic of the finger touch area according to the sensing point positions and the touch sensing quantity of the plurality of sensing points and the constructed second-order Gaussian function comprises:
and substituting the induction point positions and the touch induction quantity of at least six induction points into the second-order Gaussian function, and calculating the center point coordinate, the direction included angle and the axial length of the finger touch area.
7. The method of claim 6, wherein after the calculating the center point coordinates, the included direction angle, and the axial length of the finger touch area, the method further comprises:
and constructing an elliptical finger pressing range according to the center point coordinate, the direction included angle and the axial length.
8. An apparatus for analyzing characteristics of a finger on a touch screen, comprising:
the area determining module is used for determining a finger touch area according to the touch induction quantity of each induction point;
the data acquisition module is used for acquiring the sensing point positions and touch sensing quantities of a plurality of sensing points in the finger touch area;
the characteristic analysis module is used for determining the touch orientation characteristic of the finger touch area according to the induction point positions and the touch induction quantity of the induction points and the constructed second-order Gaussian function; the second-order Gaussian function is used for representing the relation between the position of the induction point and the touch induction quantity.
9. The apparatus of claim 8, wherein the second order gaussian function is:
x′＝(x-x0)cosθ-(y-y0)sinθ
wherein y ═ x-x0)sinθ+(y-y0)cosθ
Wherein, IxyRepresenting the touch induction quantity corresponding to the induction point position (x, y), (x)0，y0) Coordinates of center point representing finger touch area, wxAnd wyAn axial length representing an elliptical finger touch area; theta represents the direction angle between the major axis of the oval finger touch area and the horizontal direction, and A represents the amplitude.
10. The apparatus of claim 8, wherein the data obtaining module is configured to obtain sensing point positions and touch sensing amounts of a plurality of sensing points in the finger touch area.
11. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the method of analyzing characteristics of a touch screen finger of any one of claims 1-7.
12. A computer-readable storage medium, characterized in that the storage medium stores a computer program executable by a processor to perform the method of analyzing characteristics of a touch screen finger according to any one of claims 1 to 7.
13. A touch device, comprising:
a touch panel;
the touch control circuit is connected with the touch control panel and is used for executing the method for analyzing the characteristics of the touch screen finger as claimed in any one of claims 1 to 7.
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