CN107644220B - Fingerprint identification method and system of mobile terminal - Google Patents
Fingerprint identification method and system of mobile terminal Download PDFInfo
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- CN107644220B CN107644220B CN201710937899.3A CN201710937899A CN107644220B CN 107644220 B CN107644220 B CN 107644220B CN 201710937899 A CN201710937899 A CN 201710937899A CN 107644220 B CN107644220 B CN 107644220B
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Abstract
The invention discloses a fingerprint identification method and a system of a mobile terminal, wherein the mobile terminal comprises a fingerprint identification module, and the fingerprint identification method comprises the following steps: acquiring a wear area of the fingerprint identification module; and controlling fingerprint identification of the mobile terminal according to the wear area. The invention further controls the fingerprint identification of the mobile terminal according to the abrasion condition of the fingerprint identification module by detecting the abrasion area of the fingerprint identification module of the mobile terminal.
Description
Technical Field
The invention belongs to the field of fingerprint identification, and particularly relates to a fingerprint identification method and a fingerprint identification system of a mobile terminal.
Background
Present mobile terminal that has fingerprint identification function is more and more, follows the signal acquisition of fingerprint in principle, mainly is capacitanc, through pressing of finger to the fingerprint, acquires the characteristic point on the fingerprint, turns into data, records in the cell-phone. After the long-time use of fingerprint module, the signal acquisition part of fingerprint module appears damaging easily, influences the recognition speed to the fingerprint, has reduced user's physical examination, leads to even unable fingerprint identification carries out.
Disclosure of Invention
The invention provides a mobile terminal fingerprint identification method and system for overcoming the defect that a fingerprint cannot be effectively identified after a fingerprint module of a mobile terminal is damaged in the prior art.
The invention solves the problems through the following technical scheme:
a fingerprint identification method of a mobile terminal, the mobile terminal comprising a fingerprint identification module, the fingerprint identification method comprising:
acquiring a wear area of the fingerprint identification module;
and controlling fingerprint identification of the mobile terminal according to the wear area.
Optionally, the fingerprint identification module is provided with a plurality of capacitor modules arranged in a matrix, each capacitor module corresponds to one fingerprint identification unit area, and the step of acquiring the wear area of the fingerprint identification module specifically includes:
when a finger is detected to contact the fingerprint identification module, acquiring a capacitance change value of a first-class capacitance module, wherein the first-class capacitance module is each capacitance module in contact with the finger;
for each first-type capacitor module, judging whether the capacitance change value is within a preset range, and if not, determining that the first-type capacitor module is an abnormal capacitor module;
and determining the wear area according to all the abnormal capacitance modules, wherein the wear area comprises fingerprint identification unit areas corresponding to all the abnormal capacitance modules.
Optionally, the step of controlling fingerprint identification of the mobile terminal according to the wear area specifically includes:
calculating the wear rate of the fingerprint identification module according to the wear area, wherein the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
and controlling fingerprint identification of the mobile terminal according to the wear rate.
Optionally, the step of controlling fingerprint identification of the mobile terminal according to the wear rate specifically includes:
judging whether the wear rate is greater than a maximum wear value;
if so, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
if not, adjusting the minimum matching similarity required for successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
Optionally, after acquiring the worn area of the fingerprint identification module, the fingerprint identification method further includes:
and displaying a fingerprint identification area of the fingerprint identification module on a display screen of the mobile terminal, and marking the wear area.
Optionally, the fingerprint identification method further includes:
setting part of application scenes of the mobile terminal to be a high security level;
and judging whether the current application scene belongs to a high security level, and if so, executing the step of marking the wear area.
Optionally, the step of acquiring a worn area of the fingerprint identification module specifically includes:
and acquiring the wear area of the fingerprint identification module at preset intervals, or acquiring the wear area of the fingerprint identification module when the mobile terminal is started every time.
A fingerprint identification system of a mobile terminal comprises a fingerprint identification module, and the fingerprint identification system comprises a detection module and a control module;
the detection module is used for acquiring a wear area of the fingerprint identification module;
the control module is used for carrying out fingerprint identification on the mobile terminal according to the wear area.
Optionally, the fingerprint identification module is provided with a plurality of capacitor modules arranged in a matrix, each capacitor module corresponds to one fingerprint identification unit area, and the detection module comprises a data acquisition unit and a data processing unit;
the data acquisition unit is used for acquiring a capacitance change value of a first-class capacitance module when a finger is detected to contact the fingerprint identification module, wherein the first-class capacitance module is each capacitance module in contact with the finger;
the data processing unit is used for judging whether the capacitance change value is within a preset range, if not, determining that the first-class capacitance module is an abnormal capacitance module, and determining the wear area according to all the abnormal capacitance modules, wherein the wear area comprises fingerprint identification unit areas corresponding to all the abnormal capacitance modules.
Optionally, the detection module further comprises a calculation unit;
the computing unitThe method is used for calculating the wear rate of the fingerprint identification module according to the wear area, and the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
the control module is used for carrying out fingerprint identification on the mobile terminal according to the wear rate.
Optionally, the control module is further configured to determine whether the wear rate is greater than a maximum wear value;
if so, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
if not, adjusting the minimum matching similarity required for successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
Optionally, the fingerprint identification system further comprises a display module;
the display module is used for displaying the fingerprint identification area of the fingerprint identification module on a display screen of the mobile terminal and marking the wear area.
Optionally, the fingerprint identification system further comprises a level setting module and a level detection module;
the level setting module is used for setting part of application scenes of the mobile terminal to be a high security level;
the level detection module is used for detecting whether the current application scene belongs to a high security level, and if so, the display module is called.
Optionally, the detection module is further configured to acquire a wear area of the fingerprint identification module at preset intervals, or acquire the wear area of the fingerprint identification module when the mobile terminal is powered on each time.
The positive progress effects of the invention are as follows: the fingerprint identification of the mobile terminal is further controlled according to the abrasion condition of the fingerprint identification module by detecting the abrasion area of the fingerprint identification module of the mobile terminal.
Drawings
Fig. 1 is a flowchart of a fingerprint identification method of a mobile terminal according to embodiment 1 of the present invention.
Fig. 2 is a flowchart illustrating a mobile terminal acquiring a wear area of a fingerprint identification module in a fingerprint identification method of the mobile terminal according to embodiment 2 of the present invention.
Fig. 3 is a flowchart of a mobile terminal controlling fingerprint identification of the mobile terminal according to a worn area in a fingerprint identification method of the mobile terminal according to embodiment 3 of the present invention.
Fig. 4 is a flowchart of a mobile terminal controlling fingerprint identification of the mobile terminal according to a worn area in a fingerprint identification method of the mobile terminal according to embodiment 4 of the present invention.
Fig. 5 is a flowchart of a fingerprint identification method of a mobile terminal according to embodiment 5 of the present invention.
Fig. 6 is a schematic diagram illustrating a marked wear area in a fingerprint identification method of a mobile terminal according to embodiment 5 of the present invention.
Fig. 7 is a schematic diagram illustrating another method for identifying a worn area in a fingerprint identification method of a mobile terminal according to embodiment 5 of the present invention.
Fig. 8 is a flowchart of a fingerprint identification method of a mobile terminal according to embodiment 6 of the present invention.
Fig. 9 is a flowchart illustrating a method for acquiring a wear area of a fingerprint identification module by a mobile terminal in a fingerprint identification method of the mobile terminal according to embodiment 7 of the present invention.
Fig. 10 is a flowchart illustrating another method for acquiring a worn area of a fingerprint identification module by a mobile terminal according to an embodiment 7 of the present invention.
Fig. 11 is a block diagram of a fingerprint identification system of a mobile terminal according to embodiment 8 of the present invention.
Fig. 12 is a block diagram of a fingerprint identification system of a mobile terminal according to embodiment 9 of the present invention.
Fig. 13 is a block diagram of a fingerprint identification system of a mobile terminal according to embodiment 10 of the present invention.
Fig. 14 is a block diagram of a fingerprint identification system of a mobile terminal according to embodiment 12 of the present invention.
Fig. 15 is a block diagram of a fingerprint identification system of a mobile terminal according to embodiment 13 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
A fingerprint identification method of a mobile terminal, the mobile terminal includes a fingerprint identification module;
as shown in fig. 1, the fingerprint identification method includes:
and 102, the mobile terminal controls the fingerprint identification of the mobile terminal according to the wear area.
In this embodiment, the fingerprint identification of the mobile terminal is further controlled according to the wear area of the fingerprint identification module by detecting the wear area of the fingerprint identification module of the mobile terminal.
Example 2
On the basis of the embodiment 1, the fingerprint identification module is provided with a plurality of capacitor modules which are arranged in a matrix manner, and each capacitor module corresponds to one fingerprint identification unit area;
as shown in fig. 2, one possible implementation of step 101 is provided:
101-11, when detecting that a finger touches the fingerprint identification module, acquiring a capacitance change value of a first-type capacitance module; the first type of capacitance module is each capacitance module in contact with the finger;
101-12, judging whether the capacitance change value is within a preset range; if not, executing the step 101-3; if so, determining that the capacitor module is a normal capacitor module;
101-13, determining the first-type capacitor module as an abnormal capacitor module;
101-14, determining a wear area according to all the abnormal capacitance modules; the wear area comprises fingerprint identification unit areas corresponding to all the abnormal capacitance modules.
In this embodiment, the fingerprint identification module is composed of a plurality of capacitor modules arranged in a matrix, when part of the capacitor modules of the fingerprint identification module are damaged, and a finger contacts the damaged capacitor modules, the basic capacitance of the capacitor module will have a large difference from the basic capacitance of the capacitor module under a normal condition, and when the capacitance change value is detected to exceed a preset range, the capacitor module is further determined to be an abnormal capacitor module. With the area of the individual capacitive modules known, the worn area of the fingerprint recognition module in contact with the finger can be further known.
Example 3
On the basis of embodiment 1, as shown in fig. 3 in particular, a possible implementation manner of step 102 is provided:
102-11, calculating the wear rate of the fingerprint identification module according to the wear area; the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
and step 102-12, controlling fingerprint identification of the mobile terminal according to the wear rate.
In this embodiment, after the wear area of the fingerprint identification module is obtained, fingerprint identification of the mobile terminal is further controlled by the wear rate.
Example 4
On the basis of embodiment 1, as shown in fig. 4 in particular, another possible implementation manner of step 102 is provided:
102-11, calculating the wear rate of the fingerprint identification module according to the wear area; the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
102-21, judging whether the wear rate is greater than the maximum wear value; if yes, go to step 102-22; if not, executing the step 102-23;
102-22, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
step 102-23, adjusting the minimum matching similarity required by successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
In this embodiment, after the wear rate of the fingerprint identification module is calculated, the actual wear rate is compared with the set maximum wear value, for example, the maximum wear value of the fingerprint identification module is set to 30%, that is, 30% of fingerprint identification modules that can be received by the mobile terminal cannot effectively acquire the finger information, if the actual wear rate is greater than 30%, it is determined that the fingerprint identification module is damaged, and at this time, the fingerprint identification of the mobile terminal is stopped; if the actual wear value is less than 30%, the fingerprint identification module is considered to be capable of continuously identifying the fingerprint information, at this time, the fingerprint identification of the mobile terminal is controlled by setting the minimum matching similarity, because the fingerprint identification module is partially worn at this time, the fingerprint information acquired by the mobile terminal in the fingerprint identification process is not 100% consistent with the pre-stored fingerprint, at this time, the degree of fingerprint identification can be properly reduced, namely, the minimum matching required for successful fingerprint identification is adjusted, for example, the actual wear rate is 20% and is less than the set maximum wear rate of 30%, the fingerprint identification module is considered to be capable of continuously identifying the fingerprint, at this time, the minimum matching is adjusted to be 80%, namely, 80% of the fingerprint information identified by the fingerprint identification module is consistent with the fingerprint information pre-stored by the mobile terminal, namely, the fingerprint identification is considered to be successful.
Example 5
As shown in fig. 5-7, on the basis of embodiment 1, after step 101, the fingerprint identification method further includes:
and 103, displaying a fingerprint identification area of the fingerprint identification module on a display screen of the mobile terminal, and marking a wear area.
In this embodiment, after the worn area of the fingerprint identification module is obtained, the worn area may be displayed on a display screen of the mobile terminal, so as to further guide a user to touch the unworn area of the fingerprint identification module, and improve the efficiency of fingerprint identification.
Wherein, fig. 6 shows a way of marking the worn area, if the fingerprint identification module is arranged on the home key/back, and the position contacted by the finger is the position a1 in the figure, the display screen only gives a graphic prompt message, the display area a2 has a corresponding relation with the whole area of the fingerprint identification module, and the display area A3 has a corresponding relation with the worn area of the fingerprint identification module.
FIG. 7 shows another way of indicating the worn area, if the fingerprint module is embedded in the screen and a finger is used for fingerprint identification by touching the screen, display area B1 is the fingerprint identification area of the fingerprint identification module, and display area B2 is the worn area of the fingerprint identification area.
Example 6
On the basis of embodiment 5, specifically as shown in fig. 8, the fingerprint identification method further includes:
In this embodiment, the application scene of the mobile terminal may be divided into an application scene with a high security level and a general application scene, for example, the application scenes such as account login and fingerprint payment belong to the high security level, and in the application scene with the high security level, if the acquired fingerprint information is inconsistent with the fingerprint information pre-stored in the mobile terminal due to the damage of the fingerprint identification module, the worn area may be displayed on the display screen in the manner of embodiment 5, so as to guide the user to touch the unworn area of the fingerprint identification module, thereby further improving the efficiency of fingerprint identification. If the mobile terminal is in a common application scene such as bright screen unlocking, the screen of the mobile terminal is further controlled to be unlocked according to the abrasion condition, and the unlocking can be carried out by reducing the matching degree of fingerprint identification.
Example 7
As shown in fig. 9, on the basis of embodiment 1, a possible implementation manner of step 101 is provided:
and 101-21, acquiring the wear area of the fingerprint identification module at preset time intervals.
Alternatively, as shown in fig. 10, another possible implementation of step 101 is provided:
and 101-22, acquiring a wear area of the fingerprint identification module when the mobile terminal is started each time.
In this embodiment, the time for detecting the fingerprint identification module is provided, and it may be defined that the detection of the fingerprint identification module is performed each time the boot is started or the time (for example, a week time) since the last detection exceeds a set time.
Example 8
A fingerprint identification system of a mobile terminal, as shown in fig. 11 specifically, the mobile terminal includes a fingerprint identification module 1, and the fingerprint identification system includes a detection module 2 and a control module 3;
the detection module 2 is used for acquiring a wear area of the fingerprint identification module 1;
the control module 3 is configured to perform fingerprint identification of the mobile terminal according to the worn area.
In this embodiment, the detection module detects the wear area of the fingerprint identification module of the mobile terminal, and the control module further controls the fingerprint identification of the mobile terminal according to the wear area of the fingerprint identification module.
Example 9
On the basis of embodiment 8, as shown in fig. 12 in particular, the fingerprint identification module is provided with a plurality of capacitor modules arranged in a matrix, each capacitor module corresponds to one fingerprint identification unit area, and the detection module 2 includes a data acquisition unit 21 and a data processing unit 22;
the data obtaining unit 21 is configured to obtain a capacitance change value of a first type of capacitance module when a finger is detected to touch the fingerprint identification module 1, where the first type of capacitance module is each capacitance module that touches the finger;
the data processing unit 22 is configured to determine whether the capacitance variation value is within a preset range, determine that the first-type capacitance module is an abnormal capacitance module if the capacitance variation value is not within the preset range, and determine the wear area according to all the abnormal capacitance modules, where the wear area includes all fingerprint identification unit areas corresponding to the abnormal capacitance modules.
In this embodiment, the fingerprint identification module is composed of a plurality of capacitor modules arranged in a matrix, when part of the capacitor modules of the fingerprint identification module are damaged, and a finger contacts the damaged capacitor modules, the basic capacitance of the capacitor modules is greatly different from that of the capacitor modules under normal conditions, and when the data processing unit judges that the capacitance variation value exceeds a preset range, the capacitor modules are further judged to be abnormal capacitor modules. With the area of the individual capacitive modules known, the worn area of the fingerprint recognition module in contact with the finger can be further known.
Example 10
On the basis of embodiment 8, as shown in fig. 13 in particular, the detection module 2 further includes a calculation unit 23;
the calculating unit 23 is configured to calculate a wear rate of the fingerprint identification module 1 according to the wear area, and the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the area of the wear area, and the S is the coverage area of the fingerprint identification module 1;
the control module 3 is configured to perform fingerprint identification of the mobile terminal according to the wear rate.
In this embodiment, after the wear area of the fingerprint identification module is obtained, the calculation unit further calculates a wear rate, and the control unit controls fingerprint identification of the mobile terminal according to the wear rate.
Example 11
On the basis of embodiment 10, the control module is further configured to determine whether the wear rate is greater than a maximum wear value;
if so, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
if not, adjusting the minimum matching similarity required for successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
In this embodiment, after the wear rate of the fingerprint identification module is calculated, the actual wear rate is compared with the set maximum wear value, for example, the maximum wear value of the fingerprint identification module is set to 30%, that is, 30% of fingerprint identification modules that can be received by the mobile terminal cannot effectively acquire the finger information, if the actual wear rate is greater than 30%, it is determined that the fingerprint identification module is damaged, and at this time, the fingerprint identification of the mobile terminal is stopped; if the actual wear value is less than 30%, the fingerprint identification module is considered to be capable of continuously identifying the fingerprint information, at this time, the fingerprint identification of the mobile terminal is controlled by setting the minimum matching similarity, because the fingerprint identification module is partially worn at this time, the fingerprint information acquired by the mobile terminal in the fingerprint identification process is not 100% consistent with the pre-stored fingerprint, at this time, the degree of fingerprint identification can be properly reduced, namely, the minimum matching required for successful fingerprint identification is adjusted, for example, the actual wear rate is 20% and is less than the set maximum wear rate of 30%, the fingerprint identification module is considered to be capable of continuously identifying the fingerprint, at this time, the minimum matching is adjusted to be 80%, namely, 80% of the fingerprint information identified by the fingerprint identification module is consistent with the fingerprint information pre-stored by the mobile terminal, namely, the fingerprint identification is considered to be successful.
Example 12
On the basis of embodiment 8, as shown in fig. 14 in particular, the fingerprint identification system further includes a display module 4;
the display module 4 is used for displaying the fingerprint identification area of the fingerprint identification module 1 on a display screen of the mobile terminal and marking the wear area.
In this embodiment, after the worn area of the fingerprint identification module is obtained, the worn area may be further displayed on a display screen of the mobile terminal, so as to further guide a user to touch the unworn area of the fingerprint identification module, and improve the efficiency of fingerprint identification.
Example 13
On the basis of the embodiment 12, as shown in fig. 15 in particular, the fingerprint identification system further includes a level setting module 5 and a level detection module 6;
the level setting module 5 is used for setting part of application scenes of the mobile terminal to be a high security level;
the level detection module 6 is configured to detect whether the current application scene belongs to a high security level, and if so, invoke the display module 4.
In this embodiment, the application scene of the mobile terminal may be divided into an application scene with a high security level and a general application scene, for example, the application scenes such as account login and fingerprint payment belong to the high security level, and in the application scene with the high security level, if the acquired fingerprint information is inconsistent with the fingerprint information pre-stored in the mobile terminal due to the damage of the fingerprint identification module, the worn area may be displayed on the display screen in the manner in embodiment 12, so as to guide the user to touch the unworn area of the fingerprint identification module, thereby further improving the efficiency of fingerprint identification. If the mobile terminal is in a common application scene such as bright screen unlocking, the screen of the mobile terminal is further controlled to be unlocked according to the abrasion condition, and the unlocking can be carried out by reducing the matching degree of fingerprint identification.
Example 14
On the basis of embodiment 8, the detection module is further configured to acquire the wear area of the fingerprint identification module at preset intervals, or acquire the wear area of the fingerprint identification module when the mobile terminal is powered on each time.
In this embodiment, the time for detecting the fingerprint identification module is provided, and it may be defined that the detection of the fingerprint identification module is performed each time the boot is started or the time (for example, a week time) since the last detection exceeds a set time.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A fingerprint identification method of a mobile terminal, wherein the mobile terminal comprises a fingerprint identification module, the fingerprint identification method comprises the following steps:
acquiring a wear area of the fingerprint identification module;
controlling fingerprint identification of the mobile terminal according to the wear area;
the step of controlling the fingerprint identification of the mobile terminal according to the wear area specifically includes:
calculating the wear rate of the fingerprint identification module according to the wear area, wherein the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
controlling fingerprint identification of the mobile terminal according to the wear rate;
the step of controlling the fingerprint identification of the mobile terminal according to the wear rate specifically includes:
judging whether the wear rate is greater than a maximum wear value;
if so, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
if not, adjusting the minimum matching similarity required for successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
2. The fingerprint identification method according to claim 1, wherein the fingerprint identification module is provided with a plurality of capacitor modules arranged in a matrix, each capacitor module corresponds to a fingerprint identification unit area, and the step of acquiring the wear area of the fingerprint identification module specifically comprises:
when a finger is detected to contact the fingerprint identification module, acquiring a capacitance change value of a first-class capacitance module, wherein the first-class capacitance module is each capacitance module in contact with the finger;
for each first-type capacitor module, judging whether the capacitance change value is within a preset range, and if not, determining that the first-type capacitor module is an abnormal capacitor module;
and determining the wear area according to all the abnormal capacitance modules, wherein the wear area comprises fingerprint identification unit areas corresponding to all the abnormal capacitance modules.
3. The fingerprint recognition method of claim 1, wherein after acquiring the worn region of the fingerprint recognition module, the fingerprint recognition method further comprises:
and displaying a fingerprint identification area of the fingerprint identification module on a display screen of the mobile terminal, and marking the wear area.
4. The fingerprint recognition method of claim 3, wherein the fingerprint recognition method further comprises:
setting part of application scenes of the mobile terminal to be a high security level;
and judging whether the current application scene belongs to a high security level, and if so, executing the step of marking the wear area.
5. Fingerprint recognition method according to claim 1, wherein said step of acquiring worn areas of said fingerprint recognition module comprises in particular:
and acquiring the wear area of the fingerprint identification module at preset intervals, or acquiring the wear area of the fingerprint identification module when the mobile terminal is started every time.
6. A fingerprint identification system of a mobile terminal comprises a fingerprint identification module, and is characterized in that the fingerprint identification system comprises a detection module and a control module;
the detection module is used for acquiring a wear area of the fingerprint identification module;
the control module is used for carrying out fingerprint identification on the mobile terminal according to the wear area;
the detection module further comprises a calculation unit;
the calculation unit is used for calculating the wear rate of the fingerprint identification module according to the wear area, and the calculation formula is as follows: e ═ SES, wherein E is the wear rate and SEThe area of the wear area is the S, and the S is the coverage area of the fingerprint identification module;
the control module is used for carrying out fingerprint identification on the mobile terminal according to the wear rate;
the control module is further configured to determine whether the wear rate is greater than a maximum wear value;
if so, stopping fingerprint identification of the mobile terminal and generating prompt information, wherein the prompt information represents that the fingerprint identification module is damaged;
if not, adjusting the minimum matching similarity required for successful fingerprint identification according to the wear rate, and controlling the fingerprint identification of the mobile terminal according to the minimum matching similarity;
wherein an adjustment formula for adjusting the minimum matching similarity is as follows: P-1-E, wherein P is the minimum matching similarity.
7. The fingerprint identification system according to claim 6, wherein said fingerprint identification module is provided with a plurality of capacitor modules arranged in a matrix, each capacitor module corresponding to a fingerprint identification unit area, wherein said detection module comprises a data acquisition unit and a data processing unit;
the data acquisition unit is used for acquiring a capacitance change value of a first-class capacitance module when a finger is detected to contact the fingerprint identification module, wherein the first-class capacitance module is each capacitance module in contact with the finger;
the data processing unit is used for judging whether the capacitance change value is within a preset range, if not, determining that the first-class capacitance module is an abnormal capacitance module, and determining the wear area according to all the abnormal capacitance modules, wherein the wear area comprises fingerprint identification unit areas corresponding to all the abnormal capacitance modules.
8. The fingerprint recognition system of claim 6, wherein the fingerprint recognition system further comprises a display module;
the display module is used for displaying the fingerprint identification area of the fingerprint identification module on a display screen of the mobile terminal and marking the wear area.
9. The fingerprint recognition system of claim 8, wherein the fingerprint recognition system further comprises a level setting module and a level detection module;
the level setting module is used for setting part of application scenes of the mobile terminal to be a high security level;
the level detection module is used for detecting whether the current application scene belongs to a high security level, and if so, the display module is called.
10. The fingerprint recognition system of claim 6, wherein the detection module is further configured to obtain the worn area of the fingerprint recognition module at preset time intervals, or obtain the worn area of the fingerprint recognition module each time the mobile terminal is powered on.
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