CN110674707A - Biological feature detection method, biological feature detection device and electronic equipment - Google Patents
Biological feature detection method, biological feature detection device and electronic equipment Download PDFInfo
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- CN110674707A CN110674707A CN201910842004.7A CN201910842004A CN110674707A CN 110674707 A CN110674707 A CN 110674707A CN 201910842004 A CN201910842004 A CN 201910842004A CN 110674707 A CN110674707 A CN 110674707A
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- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
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Abstract
A biometric detection method, a biometric detection apparatus, and an electronic device are disclosed. The biological characteristic detection method comprises the following steps: in a first detection stage, providing a display light spot in a first display area and obtaining first image data of a detection object; in a second detection stage after the first detection stage, providing a display light spot in a second display area and obtaining second image data of the detection object; and obtaining biometric information from the first image data and the second image data, wherein the biometric detection method further comprises: and obtaining the position information of the detection object in the second detection stage, and determining the position of the second display area according to the position information. The biological characteristic detection method can adjust the position of the second display area when the position information of the detection object changes through multiple detections, thereby accurately acquiring the image information of the detection object and improving the accuracy and the success rate of biological characteristic detection.
Description
Technical Field
The present invention relates to the field of biometric detection technologies, and in particular, to a biometric detection method, a biometric detection apparatus, and an electronic device.
Background
Biometric detection technology relates to many technical research fields and is widely applied to work and life. At present, the biometric detection technology mainly comprises a capacitive biometric detection technology, an ultrasonic biometric detection technology and an optical biometric detection technology, and most of the biometric detection technologies adopt the optical biometric detection technology in various terminal devices including smart phones and tablet computers.
In the optical biometric detection technology, a Photo Detector (PD) or the like is integrated in a terminal biometric detection device and is placed inside a display screen or below the display screen to collect biometric information. The display light spot of the biological characteristic detection device irradiates a detection object, the image acquisition device receives an optical signal reflected by the surface of the detection object, converts the optical signal into an electric signal, and further processes the electric signal to obtain biological characteristic information. However, in the process of biometric detection, the detected object inevitably changes or moves according to the degree of pressure, and the position irradiated by the display light spot does not change, thereby affecting the accuracy and success rate of biometric detection.
Further improvements in biometric detection methods and biometric detection apparatuses are desired to improve the accuracy and success rate of biometric detection.
Disclosure of Invention
In view of the foregoing, an object of the present invention is to provide a biometric detection method, a biometric detection apparatus, and an electronic device, in which display light spots are provided in a second display area according to position information of a detection object, so that image information of the detection object can be accurately acquired, and accuracy and success rate of biometric detection can be improved.
According to an aspect of the present invention, there is provided a biometric detection method including: in a first detection stage, providing a display light spot in a first display area and obtaining first image data of a detection object; in a second detection stage after the first detection stage, providing the display light spot in a second display area, and obtaining second image data of the detection object; and obtaining biometric information from the first image data and the second image data, wherein the biometric detection method further comprises: and obtaining the position information of the detection object in the second detection stage, and determining the position of the second display area according to the position information.
Preferably, the method of obtaining the first image data comprises: obtaining the position information of the detection object after obtaining the first detection signal; providing the display light spot in the first display area, wherein the first display area corresponds to the position information of the detection object in the first detection stage; and acquiring first image data of the detection object, wherein the display light spot corresponds to the position of a first characteristic region of the detection object, and the first image data corresponds to the first characteristic region.
Preferably, the method of obtaining the second image data includes: obtaining the position information of the detection object after obtaining a second detection signal; determining the position of the second display area according to the position information; providing the display light spot in the second display area; and acquiring second image data of the detection object, wherein the display light spot corresponds to the position of a second characteristic region of the detection object, and the second image data corresponds to the second characteristic region.
Preferably, when the position information of the detection object is the same in the first detection stage and the second detection stage, the second display region is moved by a predetermined displacement with respect to the first display region.
Preferably, the first display area and the second display area are partially overlapped and located on the same plane.
Preferably, when the position information of the detection object is different in the first detection stage and the second detection stage, the second display area corresponds to the position information of the detection object in the second detection stage.
Preferably, when the position information of the detection object is different between the first detection stage and the second detection stage, the position information of the detection object at the time of acquiring the second image data is estimated based on the position information of the detection object at the time of acquiring the first detection signal and the second detection signal, a time difference between the acquisition of the first detection signal and the acquisition of the second detection signal, and a time difference between the acquisition of the second detection signal and the acquisition of the second image data, and the position of the second display area is obtained based on the position information of the detection object at the time of acquiring the second image data.
Preferably, the method further comprises the following steps: after the first detection phase, determining whether the second detection signal is present, and stopping biometric detection when the second detection signal is not detected.
Preferably, the method further comprises the following steps: and after the second image data is acquired, judging whether the third detection signal exists or not, and stopping the biological feature detection when the third detection signal is not detected.
Preferably, the display spot includes at least one point light source, and a position of the at least one point light source changes as the position information of the detection object changes.
Preferably, the detection object is a finger or a palm, the biometric information of the finger is fingerprint information, and the biometric information of the palm is palm print information.
According to a second aspect of the present invention, there is provided a biometric detection apparatus comprising: the touch device provides a first detection signal and a second detection signal and obtains position information of a detection object; the processor is connected to the touch device and provides a control signal according to the first detection signal and the second detection signal; the display screen is connected to the processor, provides a display light spot in a first display area after the processor receives the first detection signal, and provides a display light spot in a second display area after the processor receives the second detection signal; the image acquisition device is connected to the display screen, and acquires first image data of the detection object in the first display area and second image data of the detection object in the second display area; after the touch device detects a second detection signal, the processor determines the position of the second display area according to the position information of the detection object, and after the image acquisition device obtains the first image data and the second image data, the processor obtains the biological feature information of the detection object according to the first image data and the second image data.
According to a third aspect of the present invention, there is provided an electronic apparatus comprising: the biometric detection device as described above; and a display device connected to the biometric detection device, wherein the biometric detection device is integrated within or below the display device.
According to the biological characteristic detection method, the biological characteristic detection device and the electronic equipment, the detection signal is obtained for multiple times, and when the position information of the detection object changes, the position of the second display area can be adjusted, so that the relative positions of the first display area and the second display area and the detection object are the same or the change amount enables the second display area to be still in the pressing point of the detection object, the image information of the detection object can be accurately acquired, and the accuracy and the success rate of biological characteristic detection are improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1a to 1c show display spots of a conventional biometric sensing device;
FIG. 2 illustrates different states of a test object;
fig. 3 shows the pressing surface of the detection object and the biometric detection apparatus according to fig. 2;
FIG. 4 shows a flow diagram of a biometric detection method according to an embodiment of the invention;
FIG. 5 shows a schematic diagram of a method of acquiring image data according to an embodiment of the invention;
FIG. 6 shows a schematic diagram of a method of synthesizing a biometric image according to an embodiment of the invention;
fig. 7a shows a schematic diagram of a method of obtaining second image data according to a first embodiment of the invention;
fig. 7b shows a schematic diagram of a method of obtaining second image data according to a first embodiment of the invention;
fig. 7c shows a schematic diagram of a method of obtaining second image data according to the first embodiment of the invention;
fig. 8 shows a display spot of the biometric detection apparatus according to the first embodiment of the present invention;
fig. 9a to 9c show display spots of a biometric detection apparatus according to an embodiment of the present invention;
FIG. 10 shows a schematic view of a biometric detection device according to an embodiment of the present invention;
FIG. 11 shows a schematic view of an electronic device according to an embodiment of the invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
Fig. 1a to 1c show display spots of a conventional biometric sensing device; FIG. 2 illustrates different states of a test object; fig. 3 shows the pressing surface of the detection object and the biometric detection apparatus according to fig. 2.
As shown in fig. 1a to 1c, the biometric detection device 100 may include one or more point light sources. When the biometric detection apparatus 100 detects the detection signal, the pressing points of the detection object and the biometric detection apparatus 100 are located, and the display light spots corresponding to the pressing points include, for example, the point light sources L1 to L9, then the point light sources L1 to L9 emit light at different times and in predetermined paths and time sequences to illuminate different areas of the detection object, and the images acquired by the point light sources L1 to L9 in different areas are spliced to obtain biometric information. However, as shown in fig. 2a, 2b and 3, taking the detection object 200 as a finger as an example, in the process of collecting the biometric information and in the process of continuously pressing, along with the difference of the pressing pressure of the detection object 200, the pressing area and the pressing center point of the detection object 200 and the biometric detection device 100 change, the pressing area of the detection object 200 and the biometric detection device 100 is displaced from the pressing point 101 to the pressing point 102, and the center point is displaced from P1 to P2, and the position of the display light spot on the biometric monitoring device does not change, so the change may cause the accuracy of the biometric detection to decrease, so that the spliced biometric information is deviated, and the accuracy and the success rate of the biometric detection are affected. For example, in a full-screen mobile phone, the above problem may be more serious because it involves acquiring the biometric features of the detected object at any position of the screen, and the accuracy and success rate of biometric feature detection may be seriously affected by the movement of the detected object.
The present inventors have paid attention to the above-described problem affecting biometric detection, and therefore propose a biometric detection method and a biometric detection apparatus to solve the above-described problem.
The biological characteristic detection method, the biological characteristic detection device and the electronic equipment provided by the application can provide detection signals for multiple times, and can adjust the position of the second display area when the position information of the detection object changes, so that the relative positions of the first display area and the second display area and the detection object are the same or the change amount enables the second display area to be still in the pressing point of the detection object, the image information of the detection object can be accurately acquired, and the accuracy and the success rate of biological characteristic detection are improved.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 4 shows a flow chart of a biometric detection method according to an embodiment of the invention.
The biometric detection method comprises a first detection phase and a second detection phase, wherein the first detection phase comprises steps S101 to S104, and the second detection phase comprises steps S106 to S109.
In step S101, a first detection signal is obtained. Wherein, after detecting the first detection signal, position information of the detection object, i.e., a first pressed point between the detection object and the biometric detection device, is obtained. The detection object includes, but is not limited to, a finger or a palm, and the corresponding feature is, for example, a fingerprint or a palm print.
In step S102, display spots are provided in the first display area. In the step, the position of a first display area is determined according to the first pressing point, the first display area corresponds to the position of the first pressing point, and the display light spot is located in the first display area and illuminates a first characteristic area of the detection object.
In step S103, first image data of the detection object is obtained. In the step, an image acquisition device located in the first display area is started, and first image data corresponding to the first display area acquired by the image acquisition device is obtained, wherein the first image data corresponds to a first characteristic area of the detection object.
In step S104, it is determined whether the detection object is effectively touched. In this embodiment, whether the second detection signal is present is detected to determine whether the detection object effectively touches the biometric detection device. If the second detection signal is not detected, that is, the detection object does not effectively touch the biometric detection device, step S105 is executed, the biometric detection is finished, and the biometric information collection is cancelled; if the second detection signal is detected, i.e. the detection object continues to effectively touch the biometric detection device, steps S106 to S109 are performed to acquire the second image data.
In step S106, position information of the detection object is obtained. Wherein the position information of the detection object includes a position of a second pressed point between the detection object and the biometric detection device.
In one or more alternative embodiments, after the second detection signal is detected, if the amount of shift of the position information of the detection object from the position information of the detection object in step S101 is detected to exceed a predetermined threshold, the biometric detection is ended, and the biometric information acquisition is cancelled.
In step S107, the position of the second display region is determined based on the position information. In this step, the position of the second display area is calculated from the position information of the second pressed point, and the calculation method includes, but is not limited to, the following methods: if the position information of the detection object in step S101 and step S106 is the same, the second display area is moved by a predetermined displacement with respect to the first display area, wherein the predetermined displacement is such that the second display area remains within the pressing point of the detection object; if the position information of the detection object in step S101 and step S106 is different, the coordinate position of the second display area is obtained from the position information of the detection object obtained in step S106.
However, embodiments of the present invention are not limited thereto, and in other embodiments, if the position information of the detection object is different in step S101 and step S106, the position information of the detection object in the second detection stage is estimated to predict the position of the second display region at the time when the second image data is actually acquired, based on the position information of the detection object in the first detection stage, the direction information and the speed information of the movement of the detection object before the second detection stage starts, and the time difference between the acquisition of the second image data and the acquisition of the first image data.
In step S108, display spots are provided in the second display area. The display light spot is located in the second display area and illuminates a second characteristic area of the detection object.
In step S109, second image data of the detection object is obtained. In the step, the image acquisition device positioned in the second display area is started, and second image data corresponding to the second display area acquired by the image acquisition device is obtained, wherein the second image data corresponds to a second characteristic area of the detection object.
In step S110, it is determined whether the detection object is effectively touched. In this embodiment, whether the third detection signal is present is detected to determine whether the detection object is effectively touched. If the third detection signal is not detected, that is, the detection object does not continue to effectively touch the biometric feature detection device, step S105 is executed, the biometric feature detection is finished, and the biometric feature information acquisition is cancelled; if the third detection signal is detected, i.e. the detection object continues to effectively touch the biometric detection device, step S111 is performed. Executing step S110 may ensure that the detection object is still in contact with the touch display device when the second image data is acquired, so as to ensure validity of the acquired second image data. In an alternative embodiment, step S110 may be omitted.
In step S111, biometric information is obtained. In this step, the first image data is the biometric information of the first feature region obtained by the detection object in the first display region, and the second image data is the biometric information of the second feature region obtained by the detection object in the second display region, for example, the first image data and the second image data are data-spliced to obtain the complete biometric information.
The steps complete one-time biological characteristic information acquisition. In this embodiment, the positions of the first display area and the second display area for detecting the biological features are related to the motion track of the detection object, that is, when image data are acquired twice, the relative positions of the first display area and the second display area and the detection object are the same or change, so that the second display area is still in the pressing point of the detection object, and thus, when the detection object changes or displaces according to the pressure degree, accurate biological feature information can be obtained, and the accuracy and success rate of biological feature detection are improved.
It should be understood that this embodiment shows only the biometric detection method when the first detection signal and/or the second detection signal is detected, and the biometric detection method of the present application may also obtain the detection signals a plurality of times as necessary to obtain image data of a plurality of feature areas of the detection object.
FIG. 5 shows a schematic diagram of a method of acquiring image data according to an embodiment of the invention.
As shown in fig. 5, in the method for acquiring image data, the detection object 200 is in contact with the biometric monitoring device 300, the biometric detection device 300 at least comprises a display screen 350 and an image acquisition device 360, the display screen 340 comprises a glass substrate 351 and a point light source 352 positioned below the glass substrate 351, and light emitted by the point light source 352 illuminates different areas of the detection object 200 along different paths (as shown by paths a and b). The biometric features of the test object 200 include ridges and valleys, and the ridges and valleys of the test object 200 are different in light reflectance from the glass substrate 351. In the path a, the light irradiates the ridge position of the detection object, and the reflection at the ridge position is weak; in the path b, the light beam is irradiated to the valley position of the detection target, and total reflection occurs at the valley position, so that the valley position is strongly reflected. The image capture device 360 receives the light at different intensities to obtain image data representing the biometric image.
It should be understood that the internal structure of the display screen 340 of the biometric sensing device 300 is only schematically illustrated in fig. 5, and the structure of the display screen 340 is not limited.
Fig. 6 shows a schematic diagram of a method of synthesizing a biometric image according to an embodiment of the present invention. As shown in fig. 6, in this embodiment, the detection object is, for example, a finger, first image data of a first feature region 211 of the detection object is obtained in a first detection stage, second image data of a second feature region 212 of the detection object is obtained in a second detection stage, a superposition region 213 is provided between the first feature region 211 and the second feature region 212, and a larger biometric image 210 of the detection object can be obtained by performing data stitching on the first image data and the second image data according to the superposition region 213.
Fig. 7a to 7c show schematic diagrams of methods of obtaining second image data according to the first to third embodiments of the present invention, respectively.
As shown in fig. 7a, in the first detection stage, after the first detection signal is obtained, the first pressing point P11 of the detection object and the biometric detection apparatus 300 is obtained, and the first pressing point P21 is taken as a first display area (not shown); in the second detection stage, after the second detection signal is obtained, the detection object and the second pressed point P12 of the biometric detection apparatus 300 are obtained, and it is detected that the position information of the first pressed point P11 is the same as the position information of the second pressed point P12, then the position of the second display region a1 is moved by a predetermined displacement with respect to the position of the first pressed point P11 to acquire the image information of the first and second feature regions of the detection object.
As shown in fig. 7b, in the first detection stage, after the first detection signal is obtained, the first pressing point P21 of the detection object and the biometric detection apparatus 300 is obtained, and the first pressing point P21 is taken as a first display area (not shown); in the second detection stage, after the second detection signal is obtained, the second pressing point P22 of the detection object and the biometric detection apparatus 300 is obtained, and when the position information of the first pressing point P21 is detected to be different from the position information of the second pressing point P22, the position information of the second pressing point P21 is used as the position of the second display area a2, and since the detection object is still moving, at the time of actually acquiring the second image data in the second detection stage, the position of the detection object and the pressing point of the biometric detection apparatus 300 is at a certain distance from the position of the second display area a2, so that the image information of the first feature area and the second feature area of the detection object can be acquired.
As shown in fig. 7c, in the first detection stage, after the first detection signal is obtained, the first pressing point P31 of the detection object and the biometric detection apparatus 300 is obtained, and the first pressing point P31 is taken as a first display area (not shown); in the second sensing stage, after the second sensing signal is obtained, the sensing object and the second pressing point P32 of the biometric sensing device 300 are obtained, and it is sensed that the position information of the first pressing point P31 is different from the position information of the second pressing point P32 according to the coordinate information of the sensing object at the first pressing point P31
And the coordinates of the second pressing point P32
Obtaining a time difference δ t1 between the first pressing point P31 and the second pressing point P32 and obtaining a time difference δ t2 between the second pressing point P32 and the acquisition of the second image data, estimating position information of the inspection object at the time of the acquisition of the second image data, and estimating the estimated position information of the inspection object at the time of the acquisition of the second image dataAs the position of the second display area a3, more specifically,
fig. 8 shows a display spot of the biometric detection apparatus according to the first embodiment of the present invention.
As shown in fig. 8, in this embodiment, the display spot 304 is a point light source with a black circle on the periphery and a bright light spot on the inside. It should be understood that the present application is not limited thereto, and the display spot is an area having a specific color displayed on the screen. In other embodiments, the display spot 304 may be an array of point light sources, a solid circle that illuminates the entire pressing area of the test object, or other geometric shapes, and the number, distribution, and shape of the point light sources of the display spot are not limited.
Fig. 9a to 9c show display spots of a biometric detection apparatus according to a second embodiment of the present invention. In this embodiment, the detection signal is obtained at least three times during one acquisition of biometric information.
As shown in fig. 9a, after detecting the first detection signal, the image capturing apparatus detects the position information of the detection object in the biometric detection apparatus 300 and determines a first display area 301, the pressing center point of the detection object is L22, the first display area 301 includes point light sources L11, L12, L13, L21, L22, L23, L31, L32, and L33, provides a display spot, i.e., lights the point light source L22, the point light source L22 lights the first feature area of the detection object, and obtains first image data of the first feature area.
As shown in fig. 9b, after the second detection signal is detected, it is detected that the position information of the detection object in the biometric detection apparatus 300 is not changed, the pressing center point of the detection object is L22, the second display area 302 moves relative to the first display area 301 by a predetermined displacement, for example, by two pixel points, that is, the second display area 302 includes the point light sources L13, L14, L15, L23, L24, L25, L33, L34, and L35, a display spot is provided, that is, the point light sources L14, L23, L25, and L34 are lit, the point light sources L14, L23, L25, and L34 illuminate the second feature area of the detection object, and the image acquisition apparatus obtains second image data of the second feature area.
As shown in fig. 9c, after the third detection signal is detected, it is detected that the position information of the detection object in the biometric detection apparatus 300 changes, that is, the detection object moves, the pressing center point of the detection object is L84, the position of the third display area 302 is obtained according to the position information of the detection object in the biometric detection apparatus 300 when the third detection signal is detected, the third display area 302 includes point light sources L73, L74, L75, L83, L84, L85, L93, L94, and L95, display spots are provided, that is, the point light sources L74, L83, L85, and L94 are lit, the point light sources L74, L83, L85, and L94 illuminate the third feature area of the detection object, and the image acquisition apparatus obtains third image data of the third feature area.
However, the embodiment of the present invention is not limited thereto, and in other embodiments, as shown in fig. 9c, after the third detection signal is detected, the position information of the detection object in the biometric detection apparatus 300 is detected to be changed, that is, the detection object moves, the pressing center point of the detection object may be any point between the point light sources L22 to L84, the position of the third display area 302 is estimated according to the position information and the time difference of the detection object in the biometric detection apparatus 300 when the second detection signal is detected and the time difference between the detection of the third detection signal and the acquisition of the third image data, the calculated center point to the third display area 302 is L84, and then the third display area 302 includes the point light sources L73, L74, L75, L83, L84, L85, L93, L94, and L95, and a display spot is provided, that the point light sources L74, L83, L85, L6332, L85, and L95 are illuminated, L94, the point light sources L74, L83, L85, L94 illuminate a third feature area of the inspection object, and the image pickup device obtains third image data of the third feature area.
The embodiment illustrates that the point light sources of the display light spot vary with the position information of the detection object by taking the display area including 9 point light sources as an example, and it should be understood that the number of the point light sources included in each stage of the display light spot may be different, and the number of the point light sources of the display light spot, the shape of the display light spot, and the pattern of the display light spot are not limited.
Fig. 10 and 11 show schematic views of a biometric detection apparatus and an electronic device, respectively, according to an embodiment of the present invention.
As shown in fig. 10, the biometric detection device 300 includes a touch device 310, a processor 320, a display 330, and an image capturing device 340.
The touch device 310 provides a first detection signal and a second detection signal, generates the first detection signal after detecting that the detection object is pressed on the display screen 310, and obtains position information of the detection object after detecting the first detection signal; after the image capturing device 360 finishes capturing an image, the touch device 310 continues to detect, and generates a second detection signal after detecting that the detection object is pressed onto the display screen 330, and obtains the position information of the detection object after detecting the second detection signal.
The processor 320 is connected to the touch device 310, and configured to provide a control signal to the display screen 330 according to the first detection signal and the second detection signal, and obtain a position of the second display area according to the position information of the detection object.
The display screen 330 is connected to the processor 320 for providing display spots according to the control signal. Wherein, after the processor 320 receives the first detection signal, the processor 320 provides the control signal to make the display screen 330 provide the display spot in the first display area, and the processor 320 provides the control signal to make the display screen 330 provide the display spot in the second display area after the processor 320 receives the second detection signal.
The image capturing device 340 is connected to the display 330, and is configured to obtain first image data in the first display area, obtain second image data in the second display area, and transmit the first image data and the second image data to the processor 320, and the processor 320 processes the first image data and the second image data to obtain biometric information of the detected object after receiving the first image data and the second image data.
In some embodiments, the biometric detection device 300 may be packaged to form an electronic device for biometric information collection or biometric detection. In other embodiments, the biometric detection device 300 is integrated within or below a display screen to form an electronic device. The electronic device is, for example, a mobile phone, a notebook computer, a tablet computer, a television, a digital camera, an entrance guard device, a card punch, a biometric input device, and the like.
It should be understood that each functional unit in this embodiment may be integrated into one processing unit, each unit may exist separately, or two or more units may be integrated into one unit. The integrated unit may be implemented in the form of hardware or software.
As shown in fig. 11, for example, the biometric device 300 is located inside the display device 410 of the electronic apparatus 400, the display screen of the biometric device 300 may be integrated into the display device 410 of the electronic apparatus 400, and the display screen may be the entire display device 410 or a part of the display device 410. Taking the electronic device 400 as a full-screen optical biometric unlocking terminal as an example, the functional units of the biometric detection device 300 may be integrated inside a mobile phone, for example, the touch device and the processor of the biometric detection device 300 may be combined with other hardware or software of the mobile phone, and the biometric detection device 300 is combined with a biometric comparison system to complete biometric identification and unlocking.
When the detection object 200 touches the area of the display device 410 corresponding to the biometric detection device 300, the display device 410 provides the display light spot 411 and illuminates at least a part of the detection object 200, and when the position information of the detection object 200 changes, the biometric detection device 300 controls the position of the display light spot 411 to change along with the position of the detection object 200, so that the biometric information of the detection object 200 can be accurately detected when the pressing force of the detection object 200 is different or the detection object 200 moves, and the biometric detection device 300 cannot influence the accuracy and success rate of biometric detection due to the problem of movement of the detection object.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (13)
1. A biometric detection method, comprising:
in a first detection stage, providing a display light spot in a first display area and obtaining first image data of a detection object;
in a second detection stage after the first detection stage, providing the display light spot in a second display area, and obtaining second image data of the detection object; and
obtaining biometric information from the first image data and the second image data,
wherein the biometric detection method further comprises: and obtaining the position information of the detection object in the second detection stage, and determining the position of the second display area according to the position information.
2. The biometric detection method according to claim 1, wherein the method of obtaining the first image data includes:
obtaining the position information of the detection object after obtaining the first detection signal;
providing the display light spot in the first display area, wherein the first display area corresponds to the position information of the detection object in the first detection stage; and
acquiring the first image data of the inspection object,
wherein the display spot corresponds to a position of a first feature region of the detection object, and the first image data corresponds to the first feature region.
3. The biometric detection method according to claim 2, wherein the method of obtaining the second image data includes:
obtaining the position information of the detection object after obtaining a second detection signal;
determining the position of the second display area according to the position information;
providing the display light spot in the second display area; and
acquiring the second image data of the inspection object,
wherein the display spot corresponds to a position of a second feature region of the detection object, and the second image data corresponds to the second feature region.
4. The biometric detection method according to claim 3,
when the position information of the detection object is the same in the first detection stage and the second detection stage, the center of the second display region is moved by a predetermined displacement with respect to the center of the first display region.
5. The method according to claim 4, wherein the first display area and the second display area partially overlap and are located on the same plane.
6. The biometric feature detection method according to claim 3, wherein when the position information of the detection object is different in the first detection stage and the second detection stage, the second display area corresponds to the position information of the detection object in the second detection stage.
7. The biometric feature detection method according to claim 3, characterized in that when the position information of the detection object is different in the first detection phase and the second detection phase, the position information of the detection object at the time of acquiring the second image data is estimated from the position information of the detection object at the time of acquiring the first detection signal and the second detection signal, a time difference between acquiring the first detection signal and the second detection signal, and a time difference between acquiring the second detection signal and acquiring the second image data, and the position of the second display area is obtained from the position information of the detection object at the time of acquiring the second image data.
8. The biometric detection method according to claim 3, further comprising: after the first detection phase, determining whether the second detection signal is present, and stopping biometric detection when the second detection signal is not detected.
9. The biometric detection method according to claim 3, further comprising: and after the second image data is acquired, judging whether the third detection signal exists or not, and stopping the biological feature detection when the third detection signal is not detected.
10. The biometric detection method according to claim 1, wherein the display spot includes at least one point light source, and a position of the at least one point light source changes as the positional information of the detection object changes.
11. The biometric detection method according to claim 1, wherein the detection object is a finger or a palm, the biometric information of the finger is fingerprint information, and the biometric information of the palm is palm print information.
12. A biometric detection device, comprising:
the touch device provides a first detection signal and a second detection signal and obtains position information of a detection object;
the processor is connected to the touch device and provides a control signal according to the first detection signal and the second detection signal;
the display screen is connected to the processor, provides a display light spot in a first display area after the processor receives the first detection signal, and provides a display light spot in a second display area after the processor receives the second detection signal; and
the image acquisition device is connected to the display screen, and acquires first image data of the detection object in the first display area and acquires second image data of the detection object in the second display area;
wherein, after the touch device detects a second detection signal, the processor determines the position of the second display area according to the position information of the detection object,
after the image acquisition device obtains the first image data and the second image data, the processor obtains the biological feature information of the detection object according to the first image data and the second image data.
13. An electronic device, comprising:
the biometric detection device as recited in claim 12; and
a display device connected to the biometric detection device,
wherein the biometric detection device is integrated within or below the display device.
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