CN105975044B - Method and device for automatically controlling touch screen wet hand mode through fingerprint detection - Google Patents

Method and device for automatically controlling touch screen wet hand mode through fingerprint detection Download PDF

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Publication number
CN105975044B
CN105975044B CN201610260100.7A CN201610260100A CN105975044B CN 105975044 B CN105975044 B CN 105975044B CN 201610260100 A CN201610260100 A CN 201610260100A CN 105975044 B CN105975044 B CN 105975044B
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China
Prior art keywords
fingerprint
user
finger
image data
conductive liquid
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CN201610260100.7A
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Chinese (zh)
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CN105975044A (en
Inventor
丁泽楠
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Oppo广东移动通信有限公司
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Priority to CN201610260100.7A priority Critical patent/CN105975044B/en
Publication of CN105975044A publication Critical patent/CN105975044A/en
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/26Power supply means, e.g. regulation thereof
    • G06F1/32Means for saving power
    • G06F1/3203Power management, i.e. event-based initiation of power-saving mode
    • G06F1/3206Monitoring of events, devices or parameters that trigger a change in power modality
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K9/00Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
    • G06K9/00006Acquiring or recognising fingerprints or palmprints
    • G06K9/00013Image acquisition

Abstract

The invention discloses a method and a device for automatically controlling a touch screen hand wetting mode through fingerprint detection, wherein the method comprises the following steps: when the mobile terminal starts the fingerprint sensor, acquiring fingerprint image data when a finger of a user touches the fingerprint sensor; identifying whether a finger of a user is stained with conductive liquid or not according to the acquired fingerprint image data so as to operate the mobile terminal by wetting the hand; and if the fact that the fingers of the user are stained with the conductive liquid is recognized, automatically opening a wet hand operation mode of the touch screen of the mobile terminal. According to the invention, the dry-wet hand detection of the fingerprint can be realized when the fingerprint unlocking is carried out or the fingerprint function is used by the user, and the wet-hand operation mode of the touch screen of the mobile terminal can be automatically opened only when the finger of the user is identified to be stained with the conductive liquid, so that the operation of the user is convenient, the automatic opening/closing of the wet-hand mode of the touch screen of the terminal is facilitated, the power consumption of the terminal is reduced, and the cruising ability of the terminal is improved.

Description

Method and device for automatically controlling touch screen wet hand mode through fingerprint detection

Technical Field

The invention relates to the technical field of mobile terminals, in particular to a method and a device for automatically controlling a touch screen wet hand mode through fingerprint detection.

Background

With the advent of the mobile era, mobile terminals such as mobile phones have become tools that people carry with them, and users can watch television, play games, etc. using mobile phones. At present, a plurality of users can operate the mobile phone under the condition of wet hands, and the touch screens of the mobile phones also have the function of wet hand operation, so that the touch screen has the benefit of a novel touch sensor, namely high sensitivity and high noise ratio. However, the power consumption of the mobile phone is increased in the wet-hand mode of the mobile phone, and if the mobile phone is always turned on, the user feels that the cruising ability of the mobile phone is sharply reduced. In view of the above, it is necessary to design a method capable of automatically turning on/off a wet-hand mode of a touch screen of a mobile phone.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a method and a device for automatically controlling the touch screen wet hand mode through fingerprint detection, which can realize the dry hand and wet hand detection of fingerprints when a user unlocks the fingerprints or uses the fingerprint function, are convenient for the user to operate, are beneficial to automatically opening/closing the touch screen wet hand mode by a terminal, reduce the power consumption of the terminal and improve the cruising ability of the terminal.

In order to achieve the above object, a first aspect of the present invention provides a method for automatically controlling a wet-hand mode of a touch screen through fingerprint detection, comprising the steps of:

when the mobile terminal starts the fingerprint sensor, acquiring fingerprint image data when a finger of a user touches the fingerprint sensor;

identifying whether a finger of a user is stained with conductive liquid or not according to the acquired fingerprint image data so as to operate the mobile terminal by wetting the hand;

and if the fact that the fingers of the user are stained with the conductive liquid is recognized, automatically opening a wet hand operation mode of the touch screen of the mobile terminal.

Preferably, in the above method, when the mobile terminal starts the fingerprint sensor, the step of acquiring the fingerprint image data when the user's finger touches the fingerprint sensor specifically includes:

the method comprises the steps of charging semiconductor capacitance sensing particles on each pixel point of a fingerprint sensor to a preset reference voltage in advance;

measuring the discharge speed of the semiconductor capacitance sensing particles when a user touches the fingerprint sensor;

according to the relationship between the depth of ridges and valleys of the fingerprint and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, the positions of the ridges and valleys of the fingerprint are detected, and fingerprint image data are formed.

Preferably, in the method, the step of identifying whether a finger of the user is stained with the conductive liquid according to the acquired fingerprint image data so as to wet the hand to operate the mobile terminal specifically includes:

analyzing the depth of the color of the fingerprint of the acquired fingerprint image data and/or the size of gaps among fingerprint grains;

and when the depth of the color of the fingerprint reaches a preset threshold value and/or the size of the gap between the fingerprint lines reaches a preset threshold value, determining that the finger of the user is stained with the conductive liquid.

Preferably, in the method, the step of identifying whether a finger of the user is stained with the conductive liquid according to the acquired fingerprint image data so as to wet the hand to operate the mobile terminal specifically includes:

comparing the acquired fingerprint image data with fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid;

and when the acquired fingerprint image data is matched with the fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid, determining that the finger of the user is stained with the conductive liquid.

Preferably, in the above method, after the step of identifying whether a finger of the user is stained with the conductive liquid so as to wet the hand to operate the mobile terminal according to the acquired fingerprint image data, the method further includes:

and if the finger of the user is identified to be free of the conductive liquid, closing the wet-hand operation mode of the touch screen of the mobile terminal.

The invention provides a device for automatically controlling a touch screen wet hand mode through fingerprint detection, which comprises:

the fingerprint acquisition module is used for acquiring fingerprint image data when a user finger touches the fingerprint sensor when the mobile terminal starts the fingerprint sensor;

the wet hand identification module is used for identifying whether a finger of a user is stained with conductive liquid or not according to the acquired fingerprint image data so as to operate the mobile terminal by a wet hand;

and the wet hand mode control module is used for automatically opening the wet hand operation mode of the touch screen of the mobile terminal if the conductive liquid is adhered to the fingers of the user.

Preferably, in the above method, the fingerprint obtaining module specifically includes:

the charging module is used for charging the semiconductor capacitance sensing particles on each pixel point of the fingerprint sensor to a preset reference voltage in advance;

the discharge speed measuring module is used for measuring the discharge speed of the semiconductor capacitance sensing particles when a user touches the fingerprint sensor;

and the fingerprint image acquisition module is used for detecting the positions of ridges and valleys of the fingerprint of the finger according to the relationship between the depth of the ridges and valleys of the fingerprint of the finger and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed so as to form fingerprint image data.

Preferably, in the above method, the wet hand identification module specifically includes:

the analysis module is used for analyzing the depth degree of the fingerprint color of the acquired fingerprint image data and/or the size of gaps among fingerprint lines;

the first judging module is used for determining that the fingers of the user are stained with the conductive liquid when the depth degree of the fingerprint color reaches a preset threshold value and/or the size of gaps among the fingerprint grains reaches a preset threshold value.

Preferably, in the above method, the wet hand identification module specifically includes:

the comparison module is used for comparing the acquired fingerprint image data with the fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid;

and the second determination module is used for determining that the finger of the user is stained with the conductive liquid when the acquired fingerprint image data is matched with the fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid.

Preferably, in the method, the wet-hand mode control module is further configured to turn off the wet-hand operation mode of the touch screen of the mobile terminal if it is recognized that the finger of the user does not have the conductive liquid.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the dry-wet hand detection of the fingerprint can be realized when the user performs fingerprint unlocking or uses the fingerprint function, whether the finger of the user is stained with the conductive liquid is identified according to the acquired fingerprint image data, so that whether the finger of the user is stained with the conductive liquid is judged, and the wet-hand operation mode of the touch screen of the mobile terminal can be automatically opened only when the finger of the user is stained with the conductive liquid is identified, so that the operation of the user is facilitated, the automatic opening/closing of the wet-hand mode of the touch screen of the terminal is facilitated, the power consumption of the terminal is reduced, and the cruising ability of the terminal is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a method for automatically controlling a touch screen wet-hand mode through fingerprint detection according to an embodiment of the present invention;

FIG. 2 is a comparison chart of finger fingerprints in three different states of dryness and humidity;

fig. 3 is a block diagram of an apparatus for automatically controlling a touch screen wet-hand mode through fingerprint detection according to a second embodiment of the present invention;

fig. 4 is a block diagram of a fingerprint acquisition module according to a second embodiment of the present invention;

fig. 5 is a block diagram of a wet hand recognition module according to a second embodiment of the present invention;

fig. 6 is a block diagram of another wet hand identification module according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The embodiment of the invention provides a method for automatically controlling a touch screen wet hand mode through fingerprint detection, and the embodiment is described in detail below with reference to the accompanying drawings. Fig. 1 is a flowchart of a method according to a first embodiment of the present invention, and referring to fig. 1, the method according to the first embodiment of the present invention includes the following steps:

step S1, when the mobile terminal starts the fingerprint sensor, acquiring fingerprint image data when the user touches the fingerprint sensor;

in this embodiment, step S1 specifically includes the following steps:

step S11, charging the semiconductor capacitance sensing particles on each pixel point of the fingerprint sensor to a preset reference voltage in advance;

step S12, when the user touches the fingerprint sensor, the discharge speed of the semiconductor capacitance sensing particles is measured;

and step S13, detecting the positions of ridges and valleys of the fingerprint of the finger according to the relationship between the depth of the ridges and valleys of the fingerprint of the finger and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, and forming fingerprint image data.

Because the ridges of the fingerprint are convex and the valleys are concave, different capacitance values can be formed at the positions of the ridges and the valleys according to the relationship between the capacitance values and the distances, meanwhile, the discharge speeds of the ridges and the valleys are different, and the positions of the ridges and the valleys can be detected according to the relationship between the depth of the ridges and the valleys of the fingerprint and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, namely, the pixels under the ridges (with high capacitance) are discharged slowly, and the pixels under the valleys (with low capacitance) are discharged quickly, so that fingerprint image data can be formed.

In actual operation, when a finger of a user is placed on the fingerprint sensor to unlock the fingerprint or the fingerprint function is used, the fingerprint image data can be acquired.

Step S2, according to the acquired fingerprint image data, identifying whether the finger of the user is stained with the conductive liquid so as to operate the mobile terminal by wetting the hand;

wherein, the step S2 specifically includes the following steps:

step S211, analyzing the depth of the color of the fingerprint of the acquired fingerprint image data and/or the size of the gaps among the fingerprint lines;

step S212, when the depth of the color of the fingerprint reaches a preset threshold value and/or the size of the gap between the fingerprint lines reaches a preset threshold value, determining that the finger of the user is stained with the conductive liquid.

As shown in fig. 2, when the finger of the user is wet, the color of the fingerprint of the finger is darker, and the gaps between the fingerprint lines are narrowed.

Of course, in another embodiment, the step S2 also includes the following steps:

step S221, comparing the acquired fingerprint image data with fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid;

step S222, when the acquired fingerprint image data matches the fingerprint image data acquired in advance when the user 'S finger is stained with the conductive liquid, determining that the user' S finger is stained with the conductive liquid.

In particular, the conductive liquid may include water, oil, sweat, or other conductive liquid medium. If the finger of the user is recognized to be stained with the conductive liquid, executing step S3; if it is recognized that the user' S finger does not have the conductive liquid, step S4 is performed.

And step S3, automatically opening the wet-hand operation mode of the touch screen of the mobile terminal.

And step S4, closing the wet-hand operation mode of the touch screen of the mobile terminal.

When the touch screen of the mobile terminal is in a wet hand operation mode, the sensors are in a low array density mode, when the touch screen of the mobile terminal is in a wet hand operation mode, the array density of the sensors needs to be improved, the sensors are set to work in full array density, and if the touch screen is in the wet hand operation mode all the time, the power consumption of the terminal is greatly increased.

The method can realize the dry and wet hand detection of the fingerprint when the user unlocks the fingerprint or uses the fingerprint function, and identifies whether the finger of the user is stained with the conductive liquid according to the acquired fingerprint image data so as to judge whether the finger of the user is stained with the conductive liquid or not, so that the operation of the mobile terminal is judged, and the wet hand operation mode of the touch screen of the mobile terminal can be automatically opened only when the finger of the user is stained with the conductive liquid, thereby facilitating the operation of the user, being beneficial to the automatic opening/closing of the wet hand mode of the touch screen by the terminal, reducing the power consumption of the terminal and improving the cruising ability of the terminal.

Example two

Referring to fig. 3, the apparatus according to the second embodiment of the present invention includes a fingerprint obtaining module 1, a wet hand identifying module 2, and a wet hand mode control module 3, and the principle of the above modules will be described in detail below.

The fingerprint acquisition module 1 is used for acquiring fingerprint image data when a user finger touches the fingerprint sensor when the mobile terminal starts the fingerprint sensor.

Further, as shown in fig. 4, the fingerprint obtaining module 1 specifically includes:

the charging module 11 is used for charging the semiconductor capacitance sensing particles on each pixel point of the fingerprint sensor to a preset reference voltage in advance;

a discharge speed measuring module 12, configured to measure a discharge speed of the semiconductor capacitance sensing particles when a user touches the fingerprint sensor;

the fingerprint image acquisition module 13 is configured to detect the positions of the ridges and valleys of the fingerprint of the finger according to the relationship between the depth of the ridges and valleys of the fingerprint of the finger and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, so as to form fingerprint image data.

Because the ridges of the fingerprint are convex and the valleys are concave, different capacitance values can be formed at the positions of the ridges and the valleys according to the relationship between the capacitance values and the distances, meanwhile, the discharge speeds of the ridges and the valleys are different, and the positions of the ridges and the valleys can be detected according to the relationship between the depth of the ridges and the valleys of the fingerprint and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, namely, the pixels under the ridges (with high capacitance) are discharged slowly, and the pixels under the valleys (with low capacitance) are discharged quickly, so that fingerprint image data can be formed.

In actual operation, when a finger of a user is placed on the fingerprint sensor to unlock the fingerprint or the fingerprint function is used, the fingerprint image data can be acquired through the fingerprint acquisition module 1.

And the wet hand identification module 2 is used for identifying whether the finger of the user is stained with the conductive liquid or not according to the acquired fingerprint image data, so that the wet hand operates the mobile terminal.

In particular, the conductive liquid may include water, oil, sweat, or other conductive liquid medium.

Further, as shown in fig. 5, the wet hand recognition module 2 specifically includes:

the analysis module 21 is configured to analyze a depth of a fingerprint color of the acquired fingerprint image data and/or a size of a gap between fingerprint lines;

the first determination module 22 is configured to determine that the finger of the user is stained with the conductive liquid when the depth of the color of the fingerprint reaches a preset threshold or the size of the gap between the fingerprint lines reaches a preset threshold.

As shown in fig. 2, when the finger of the user is wet, the color of the fingerprint of the finger is darker, and the gaps between the fingerprint lines are narrowed.

As another preferred embodiment, as shown in fig. 6, the wet hand identification module 2 may also specifically include:

the comparison module 23 is configured to compare the acquired fingerprint image data with fingerprint image data acquired in advance when a finger of a user is stained with a conductive liquid;

and the second determination module 24 is configured to determine that the finger of the user is stained with the conductive liquid when the acquired fingerprint image data matches the pre-acquired fingerprint image data acquired when the finger of the user is stained with the conductive liquid.

And the wet hand mode control module 3 is used for automatically opening the wet hand operation mode of the touch screen of the mobile terminal if the conductive liquid is adhered to the fingers of the user.

In addition, the wet-hand mode control module 3 may be further configured to turn off the wet-hand operation mode of the touch screen of the mobile terminal if it is recognized that the finger of the user does not have the conductive liquid.

The device can realize the dry and wet hand detection of the fingerprint when a user unlocks the fingerprint or uses the fingerprint function, and identifies whether the finger of the user is stained with the conductive liquid according to the acquired fingerprint image data, so as to judge whether the finger of the user is stained with the conductive liquid to operate the mobile terminal.

It should be noted that, the device for automatically controlling the touch screen wet hand mode through fingerprint detection provided in the above embodiment is only exemplified by the division of the above functional modules, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the system may be divided into different functional modules to complete all or part of the above described functions. In addition, the mobile terminal can be a mobile phone, a tablet computer, a human-computer interaction terminal or other mobile terminal equipment with a touch screen wet-hand mode.

It will be understood by those skilled in the art that all or part of the steps in the method for implementing the above embodiments may be implemented by relevant hardware instructed by a program, and the program may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims (6)

1. A method for automatically controlling a touch screen wet hand mode through fingerprint detection is characterized by comprising the following steps:
when the mobile terminal starts the fingerprint sensor, acquiring fingerprint image data when a finger of a user touches the fingerprint sensor;
according to the acquired fingerprint image data, whether the finger of the user is stained with the conductive liquid or not is identified, so that the operation of the mobile terminal is carried out by wetting the hand, and the method comprises the following steps: comparing the acquired fingerprint image data with fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid; when the acquired fingerprint image data are matched with the fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid, determining that the finger of the user is stained with the conductive liquid;
if the fact that the fingers of the user are stained with the conductive liquid is recognized, automatically opening a wet hand operation mode of the touch screen of the mobile terminal, wherein the touch sensor is in a full array density mode under the condition that the wet hand operation mode is opened;
and if the fact that the fingers of the user do not contain the conductive liquid is recognized, automatically closing a wet-hand operation mode of the touch screen of the mobile terminal, wherein the touch sensor is in a low array density mode under the condition that the wet-hand operation mode is closed.
2. The method as claimed in claim 1, wherein the step of acquiring the fingerprint image data when the finger of the user touches the fingerprint sensor when the mobile terminal starts the fingerprint sensor specifically comprises:
the method comprises the steps of charging semiconductor capacitance sensing particles on each pixel point of a fingerprint sensor to a preset reference voltage in advance;
measuring the discharge speed of the semiconductor capacitance sensing particles when a user touches the fingerprint sensor;
according to the relationship between the depth of ridges and valleys of the fingerprint and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed, the positions of the ridges and valleys of the fingerprint are detected, and fingerprint image data are formed.
3. The method according to claim 1, wherein the step of identifying whether the finger of the user is stained with the conductive liquid according to the acquired fingerprint image data so that the wet hand can operate the mobile terminal further comprises:
analyzing the depth of the color of the fingerprint of the acquired fingerprint image data and/or the size of gaps among fingerprint grains;
and when the depth of the color of the fingerprint reaches a preset threshold value and/or the size of the gap between the fingerprint lines reaches a preset threshold value, determining that the finger of the user is stained with the conductive liquid.
4. An apparatus for automatically controlling a touch screen wet hand mode by fingerprint detection, the apparatus comprising:
the fingerprint acquisition module is used for acquiring fingerprint image data when a user finger touches the fingerprint sensor when the mobile terminal starts the fingerprint sensor;
wet hand identification module for according to the fingerprint image data who acquires, thereby discernment user's finger is stained with electrically conductive liquid and wet hand operates mobile terminal, wet hand identification module includes: the comparison module is used for comparing the acquired fingerprint image data with the fingerprint image data acquired in advance when the finger of the user is stained with the conductive liquid; the second determination module is used for determining that the finger of the user is stained with the conductive liquid when the acquired fingerprint image data is matched with the fingerprint image data which is acquired in advance when the finger of the user is stained with the conductive liquid;
the wet hand mode control module is used for automatically opening a wet hand operation mode of the touch screen of the mobile terminal if the fact that the fingers of the user are stained with the conductive liquid is recognized, and the touch sensor is in a full array density mode under the condition that the wet hand operation mode is opened; and the touch sensor is also used for automatically turning off a wet-hand operation mode of the touch screen of the mobile terminal if the finger of the user is identified to be free of the conductive liquid, wherein the touch sensor is in a low array density mode when the wet-hand operation mode is turned off.
5. The apparatus for automatically controlling a wet-hand mode of a touch screen according to claim 4, wherein the fingerprint acquisition module specifically comprises:
the charging module is used for charging the semiconductor capacitance sensing particles on each pixel point of the fingerprint sensor to a preset reference voltage in advance;
the discharge speed measuring module is used for measuring the discharge speed of the semiconductor capacitance sensing particles when a user touches the fingerprint sensor;
and the fingerprint image acquisition module is used for detecting the positions of ridges and valleys of the fingerprint of the finger according to the relationship between the depth of the ridges and valleys of the fingerprint of the finger and the capacitance value formed by the semiconductor capacitance sensing particles and the discharge speed so as to form fingerprint image data.
6. The apparatus for automatically controlling the wet hand mode of a touch screen through fingerprint detection according to claim 4, wherein the wet hand identification module further comprises:
the analysis module is used for analyzing the depth degree of the fingerprint color of the acquired fingerprint image data and/or the size of gaps among fingerprint lines;
the first judging module is used for determining that the fingers of the user are stained with the conductive liquid when the depth degree of the fingerprint color reaches a preset threshold value and/or the size of gaps among the fingerprint grains reaches a preset threshold value.
CN201610260100.7A 2016-04-25 2016-04-25 Method and device for automatically controlling touch screen wet hand mode through fingerprint detection CN105975044B (en)

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WO2018107401A1 (en) * 2016-12-14 2018-06-21 深圳市汇顶科技股份有限公司 Method and device for detecting wet hand area in fingerprint image

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