CN109934211A - The calibration method and relevant apparatus of fingerprint - Google Patents
The calibration method and relevant apparatus of fingerprint Download PDFInfo
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- CN109934211A CN109934211A CN201910179027.4A CN201910179027A CN109934211A CN 109934211 A CN109934211 A CN 109934211A CN 201910179027 A CN201910179027 A CN 201910179027A CN 109934211 A CN109934211 A CN 109934211A
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Abstract
The embodiment of the present application discloses the calibration method and relevant apparatus of a kind of fingerprint, is applied to electronic equipment, which comprises when the electronic equipment is in first state, acquires the reference picture of the first quantity；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；The gain of calibration factor figure is generated according to the reference picture of first quantity and the reference picture of second quantity.It can be seen that, implement the embodiment of the present application by setting calibration box to acquire reference picture, avoid the interference of environment light, improve the precision of the calibration factor figure gain of generation, and then improve the accuracy calibrated according to the calibration factor figure gain to fingerprint image, achieve the purpose that the ambient noise for eliminating fingerprint image, improves the accuracy of fingerprint identification of fingerprint mould group.
Description
Technical field
This application involves technical field of electronic equipment, and in particular to a kind of method and relevant apparatus of the calibration of fingerprint.
Background technique
With the development of science and technology electronic equipment has become essential tool in people's life.The solution of electronic equipment
Lock mode develops unlocked by fingerprint efficient and convenient and safe by now by initial simple password and gesture unlock.With fingerprint solution
Lock technology is constantly progressive, and optical finger print nowadays may be implemented and be unlocked.Optical finger print needs to carry out school before factory
Standard, the mode of calibration are the setting silica gel heads in fingerprint mould group, and then fingerprint mould group acquires the image of silica gel head reflection to judge
Whether fingerprint image signal quality is qualified to complete entire detection calibration.
Summary of the invention
The embodiment of the present application provides the calibration method and relevant apparatus of a kind of fingerprint, to be promoted for carrying out fingerprint school
The quality of quasi- calibration factor figure gain promotes the calibration accuracy to fingerprint mould group.
In a first aspect, the embodiment of the present application provides a kind of calibration method of fingerprint, it is applied to electronic equipment, the electronics is set
The fingerprint mould group of the standby predeterminable area setting including display screen and the relatively described display screen, which comprises
When the electronic equipment is in first state, the reference picture of the first quantity is acquired, the first state refers to
It is first that the predeterminable area of the display screen, which is provided with the first calibration box and the color of the inner surface of the first calibration box,
Color, the inner surface include medial surface of the first calibration box relative to the predeterminable area；
When the electronic equipment is in the second state, the reference picture of the second quantity is acquired, second state refers to
It is second that the predeterminable area of the display screen, which is provided with the second calibration box and the color of the inner surface of the second calibration box,
Color, first color are different with second color；
The gain of calibration factor figure is generated according to the reference picture of first quantity and the reference picture of second quantity.
Second aspect, the embodiment of the present application provide a kind of calibrating installation of fingerprint, are applied to electronic equipment, and the electronic equipment includes aobvious
The fingerprint mould group of the predeterminable area of display screen and relatively described display screen setting, the calibrating installation of institute's fingerprint include processing unit and lead to
Believe unit, wherein
The processing unit, for receiving the letter that the electronic equipment is in first state by the communication unit
When breath, the reference picture of the first quantity is acquired, the first state refers to that the predeterminable area of the display screen is provided with the
The color of the inner surface of one calibration box and the first calibration box is the first color, and the inner surface includes first calibration
Medial surface of the box relative to the predeterminable area；And for being in receiving the electronic equipment by the communication unit
When the information of the second state, the reference picture of the second quantity is acquired, second state refers to the described default of the display screen
Region be provided with the second calibration box and it is described second calibration box inner surface color be the second color, first color and
Second color is different；And for raw according to the reference picture of first quantity and the reference picture of second quantity
At calibration factor figure gain.
The third aspect, the embodiment of the present application provide a kind of electronic equipment, including processor, memory, communication interface and
One or more programs, wherein said one or multiple programs are stored in above-mentioned memory, and are configured by above-mentioned
It manages device to execute, above procedure is included the steps that for executing the instruction in the embodiment of the present application first aspect either method.
Fourth aspect, the embodiment of the present application provide a kind of computer readable storage medium, wherein above-mentioned computer-readable
Storage medium storage is used for the computer program of electronic data interchange, wherein above-mentioned computer program executes computer such as
Step some or all of described in the embodiment of the present application first aspect either method.
5th aspect, the embodiment of the present application provide a kind of computer program product, wherein above-mentioned computer program product
Non-transient computer readable storage medium including storing computer program, above-mentioned computer program are operable to make to calculate
Machine executes the step some or all of as described in the embodiment of the present application first aspect either method.The computer program product
It can be a software installation packet.
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
Electronic equipment acquires reference picture by setting calibration box first in embodiment, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of application for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that the predeterminable area of a kind of fingerprint mould group provided by the embodiments of the present application and the corresponding display screen of fingerprint mould group is set
It is equipped with the structural schematic diagram of calibration box；
Fig. 2 is a kind of flow diagram of the calibration method of fingerprint provided by the embodiments of the present application；
Fig. 3 is the flow diagram of the calibration method of another fingerprint provided by the embodiments of the present application；
Fig. 4 is the flow diagram of the calibration method of another fingerprint provided by the embodiments of the present application；
Fig. 5 is the structural schematic diagram of a kind of electronic equipment provided by the embodiments of the present application；
Fig. 6 is a kind of functional unit composition block diagram of the calibrating installation of fingerprint provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall in the protection scope of this application.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
It describes in detail with reference to the accompanying drawing to the embodiment of the present application
As shown in Figure 1, Fig. 1 is a kind of fingerprint mould group provided by the embodiments of the present application and the corresponding display screen of fingerprint mould group
Predeterminable area is provided with the structural schematic diagram of calibration box；Including: calibration box 101, cover-plate glass 102, touch tablet and screen
103, Olens mould group 104, imaging sensor 105；Wherein the effect of Olens mould group 104 is to prevent the scattering of light source from leading to image
It is fuzzy.Calibration box 101 and cover-plate glass 102 constitute enclosure space to be used to block environment light.Carrying out the calibration of fingerprint mould group
In the process, touch tablet and screen 103 first issues light source, light source is reached after cover-plate glass 102 calibration box 101 and relative to
The inner reflection face of the predeterminable area of display screen, light by inner reflection face reflect after, by cover-plate glass 102, touch tablet and
Reach imaging sensor 105 after screen 103 and Olens mould group 104, imaging sensor 105 according to the light source that receives carry out at
Picture obtains reference picture.Wherein, the fingerprint mould group specifically can be optical finger print mould group.
The description and claims of this application and term " first " in above-mentioned attached drawing, " second " etc. are for distinguishing
Different objects, are not use to describe a particular order.In addition, term " includes " and " having " and their any deformations, it is intended that
It is to cover and non-exclusive includes.Such as the process, method, system, product or equipment for containing a series of steps or units do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include other step or units intrinsic for these process, methods, product or equipment.
Electronic equipment involved by the embodiment of the present application may include various handheld devices, mobile unit, wearable set
It is standby, calculate equipment or be connected to radio modem other processing equipments and various forms of user equipment (User
Equipment, UE), mobile station (Mobile Station, MS), electronic equipment (terminal Pevice) etc..
Referring to Fig. 2, Fig. 2 is a kind of flow diagram of the calibration method of fingerprint provided by the embodiments of the present application, application
In electronic equipment, the electronic equipment includes the fingerprint mould group of the predeterminable area setting of display screen and the relatively described display screen, such as
Shown in figure, the calibration method of this fingerprint includes:
Step 201, when the electronic equipment is in first state, the electronic equipment acquire the first quantity with reference to figure
Picture.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region.The medial surface can reflect the light source of display screen sending.
Step 202, when the electronic equipment is in the second state, the electronic equipment acquire the second quantity with reference to figure
Picture.
Wherein, second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color.
Step 203, the electronic equipment is according to the reference picture of first quantity and second quantity with reference to figure
As generating the gain of calibration factor figure.
Wherein, the gain of calibration factor figure includes the gain values in each presetted pixel point.
Wherein, the gain of calibration factor figure will store in the electronic device, so that Subsequent electronic equipment is executing fingerprint knowledge
Not Cao Zuo when according to calibration factor figure gain calibration obtain fingerprint image.
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
In embodiment, electronic equipment acquires reference picture by setting calibration box first, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
In a possible example, the electronic equipment is counted according to the reference picture of first quantity and described second
The reference picture of amount generates the gain of calibration factor figure, comprising: according to the picture of each image in the reference picture of first quantity
Element value generates the first reference calibrations image；Second is generated according to the pixel value of each image in the reference picture of second quantity
Reference calibrations image；Target alignment image is generated according to the first reference calibrations image and the second reference calibrations image；
Normalized, which is executed, for the target alignment image obtains the calibration factor figure gain.
Wherein, to be electronic equipment obtain the numerical value being calculated after data parameters by own hardware to pixel value.If one
Image is gray level image, then its pixel value is exactly gray value；If an image is color image, gray value need to be according to function
Mapping relations obtain, and then determine its pixel value.
Wherein, reference picture has a corresponding pixel value in each preset pixel, in the reference picture of the first quantity
The specification of each image is identical, therefore each image in presetted pixel point has corresponding pixel in the reference picture of the first quantity
Therefore value generates the first reference in the corresponding pixel value of presetted pixel point according to each image in the reference picture of the first quantity
Calibrate image；Similarly the can be generated in the corresponding pixel value of presetted pixel point according to each image in the reference picture of the second quantity
Two reference calibrations images.
As it can be seen that electronic equipment can be according to the reference picture of the first quantity of acquisition and the reference of the second quantity in this example
Image, which calculates, generates the first reference calibrations image and the second reference calibrations image, eliminates accidental sexual factor, improves the first ginseng
The applicability of calibration image and the second reference calibrations image is examined, and then improves the quality of the target alignment image of generation, so that
In the elimination fingerprint image that the calibration factor figure gain being normalized for target alignment image can be more accurate
Due to electronic equipment internal structure reasons for its use noise.
In a possible example, the electronic equipment is according to each image in the reference picture of first quantity
Pixel value generates the first reference calibrations image；The is generated according to the pixel value of each image in the reference picture of second quantity
Two reference calibrations images, comprising: it is corresponding in each presetted pixel point to obtain each image in the reference picture of first quantity
Pixel value, obtain the first quantity pixel value for each presetted pixel point；Calculate the first quantity pixel
The average value of value obtains the first of each presetted pixel point with reference to average value；According to each presetted pixel point
First generates the first reference calibrations image with reference to average value；Each image in the reference picture of second quantity is obtained to exist
The corresponding pixel value of each presetted pixel point, obtains the second quantity pixel value for each presetted pixel point；
The average value for calculating the second quantity pixel value obtains the second of each presetted pixel point and refers to average value；According to institute
State each presetted pixel point described second generates the second reference calibrations image with reference to average value.
For example, each image includes 100 presetted pixel points in the reference picture of the first quantity, then presets for 100
The each presetted pixel point of pixel has the first quantity value, seeks the flat of the first quantity value for being directed to the first presetted pixel point
Mean value obtains the first of the first presetted pixel point with reference to average value, can similarly calculate the second presetted pixel o'clock to the 100th default
The first of pixel refers to average value, raw with reference to average value according to the first of the first presetted pixel o'clock to the 100th presetted pixel point
At the first reference calibrations image.Similarly, the second reference calibrations image is produced.
As it can be seen that in this example, by seek each image in reference picture presetted pixel point pixel average value come
Reference calibrations image is generated, the contingency of data is avoided, the reference calibrations image made has applicability.
In a possible example, the electronic equipment is according to the first reference calibrations image and second reference
It calibrates image and generates target alignment image, comprising: subtract institute with reference to average value for described the first of each presetted pixel point
It states second and obtains the calibration difference of each presetted pixel point with reference to average value；According to each presetted pixel point
It calibrates difference and generates the target alignment image.
As it can be seen that electronic equipment determines that target alignment image is referred in the pixel value of presetted pixel point for first in this example
Image and the second reference calibrations image are calibrated in the difference of presetted pixel point, so that electronic equipment can generate target school according to difference
Quasi- image, and then the calibration factor figure gain needed.
In a possible example, the electronic equipment executes normalized for the target alignment image and obtains
The calibration factor figure gain, comprising: calculate the average value of the calibration difference of each presetted pixel point；It will be described every
The calibration difference of a presetted pixel point obtains the mark of each presetted pixel point divided by the average value of the calibration difference
Quasi- value；The calibration factor figure gain is generated according to the standard value of each presetted pixel point.
Optionally, the target alignment image is directed to according to formula " norm=(Xi-min (x))/max (x)-min (x)) "
Execute normalized, wherein the Xi indicates the pixel value of the first pixel in target alignment image, max (x) and min (x)
The max pixel value and minimum pixel value of target alignment image are respectively indicated, norm indicates that the first pixel has executed the normalizing
Change treated scalar value.First pixel can indicate any one presetted pixel point in target alignment image.
In a possible example, the electronic equipment is counted according to the reference picture of first quantity and described second
The reference picture of amount generates after the gain of calibration factor figure, which comprises obtains the first fingerprint image of test finger；Root
The calibration pixel value of each pixel in the first fingerprint image is calculated according to preset formula, the preset formula includes: calibration
Pixel value=pixel difference * calibration factor figure gain, the pixel difference are equal to the pixel value of first fingerprint image
Subtract the pixel value of the second reference calibrations image；According to the calibration picture of each pixel in first fingerprint image
Element value generates the second fingerprint image, and second fingerprint image is that first fingerprint image removes the image after ambient noise.
Wherein, the pixel value that the pixel value of the first fingerprint image subtracts the second reference calibrations image refers specifically to:
The pixel value of the first presetted pixel point subtracts corresponding first presetted pixel in the second reference calibrations image in first fingerprint image
The pixel value of point；First presetted pixel point can represent any one pixel in the first fingerprint image and the second reference calibrations image
Point.
Wherein, the calibration when calculating the calibration pixel value of each pixel, in pixel difference * calibration factor figure gain
Coefficient figure gain refers specifically to the standard value of the pixel currently calculated, such as calculates the calibration pixel value of the first presetted pixel point
When, the mark of calibration pixel value=first presetted pixel point pixel difference * the first presetted pixel point of the first presetted pixel point
Quasi- value.
As it can be seen that electronic equipment can be according to the gain of calibration factor figure and the second reference picture of generation to first in this example
Fingerprint image is handled, to eliminate in the first fingerprint image because the factors such as structure, touch panel cabling inside display screen produce
Raw ambient noise obtains no ambient noise or ambient noise second fingerprint image less compared to the first fingerprint image, makes
When obtaining electronic equipment according to the execution fingerprint recognition verifying of the second fingerprint image, fingerprint recognition is had higher success rate.
In a possible example, the calibration box and the predeterminable area constitute enclosure space, the enclosure space
For blocking environment light.
As it can be seen that calibration box and predeterminable area may make up enclosure space to block environment light, so that fingerprint mould group in this example
From the influence of environment light when the reflected light of reception calibration box, and then accurately determine the back that electronic equipment self structure generates
Scape noise.
It is consistent with above-mentioned embodiment shown in Fig. 2, referring to Fig. 3, Fig. 3 is that another kind provided by the embodiments of the present application refers to
The flow diagram of the calibration method of line is applied to electronic equipment, and the electronic equipment includes display screen and the relatively described display
The fingerprint mould group of the predeterminable area setting of screen, as shown, the calibration method of this fingerprint includes:
Step 301, when the electronic equipment is in first state, acquire the first quantity reference picture.
Step 302, when the electronic equipment is in the second state, acquire the second quantity reference picture.
Step 303, the electronic equipment are generated according to the pixel value of each image in the reference picture of first quantity
First reference calibrations image.
Step 304, the electronic equipment are generated according to the pixel value of each image in the reference picture of second quantity
Second reference calibrations image.
Step 305, the electronic equipment are raw according to the first reference calibrations image and the second reference calibrations image
At target alignment image.
Step 306, the electronic equipment execute normalized for the target alignment image and obtain the calibration system
Number figure gain.
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
Electronic equipment acquires reference picture by setting calibration box first in embodiment, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
In addition, electronic equipment can calculate life according to the reference picture of the first quantity of acquisition and the reference picture of the second quantity
At the first reference calibrations image and the second reference calibrations image, accidental sexual factor is eliminated, improves the first reference calibrations image
With the applicability of the second reference calibrations image, and then the quality of the target alignment image of generation is improved, so that being directed to target school
The calibration factor figure gain that quasi- image is normalized can be more accurate elimination fingerprint image in since electronics is set
Standby internal structure reasons for its use noise.
Consistent with above-mentioned embodiment shown in Fig. 2, please referring to 4, Fig. 4 is a kind of fingerprint provided by the embodiments of the present application
The flow diagram of calibration method is applied to electronic equipment, and the electronic equipment includes display screen and the relatively described display screen
The fingerprint mould group of predeterminable area setting, as shown, the calibration method of this fingerprint includes:
Step 401, when the electronic equipment is in first state, acquire the first quantity reference picture.
Step 402, when the electronic equipment is in the second state, acquire the second quantity reference picture.
Step 403, the electronic equipment obtain in the reference picture of first quantity each image in each default picture
The corresponding pixel value of vegetarian refreshments obtains the first quantity pixel value for each presetted pixel point；Calculate first number
The average value for measuring a pixel value obtains the first of each presetted pixel point and refers to average value；According to each presetted pixel
Described the first of point generates the first reference calibrations image with reference to average value.
Step 404, the electronic equipment obtain in the reference picture of second quantity each image described each pre-
If the corresponding pixel value of pixel, the second quantity pixel value for each presetted pixel point is obtained；Calculate described
The average value of two quantity pixel values obtains the second of each presetted pixel point with reference to average value；According to described each default
Described the second of pixel generates the second reference calibrations image with reference to average value.
Step 405, the electronic equipment subtract described the first of each presetted pixel point with reference to average value described
Second obtains the calibration difference of each presetted pixel point with reference to average value.
Step 406, the electronic equipment generate the target according to the calibration difference of each presetted pixel point
Calibrate image.
Step 407, the electronic equipment calculate the average value of the calibration difference of each presetted pixel point.
Step 408, the electronic equipment are by the calibration difference of each presetted pixel point divided by the calibration difference
The average value of value obtains the standard value of each presetted pixel point.
Step 409, the electronic equipment generate the calibration according to the standard value of each presetted pixel point and are
Number figure gain.
Step 410, the electronic equipment obtain the first fingerprint image of test finger.
The school of each pixel in the first fingerprint image is calculated according to preset formula for step 411, the electronic equipment
Quasi- pixel value.
Wherein, the preset formula includes: calibration pixel value=pixel difference * calibration factor figure gain, the pixel
The pixel value that point difference is equal to first fingerprint image subtracts the pixel value of the second reference calibrations image.
Step 412, the electronic equipment are according to the calibration pixel value of each pixel in first fingerprint image
Generate the second fingerprint image.
Wherein, second fingerprint image is that first fingerprint image removes the image after ambient noise
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
Electronic equipment acquires reference picture by setting calibration box first in embodiment, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
In addition, electronic equipment can according to the calibration factor figure gain of generation and the second reference picture to the first fingerprint image into
Row processing, to eliminate in the first fingerprint image because the factors reasons for its use such as structure, touch panel cabling inside display screen are made an uproar
Sound obtains no ambient noise or ambient noise second fingerprint image less compared to the first fingerprint image, so that electronic equipment
Fingerprint recognition verifying can be executed according to the second fingerprint image, improve the discrimination of fingerprint recognition.
It is consistent with above-mentioned Fig. 2, Fig. 3, embodiment shown in Fig. 4, referring to Fig. 5, Fig. 5 is provided by the embodiments of the present application
The structural schematic diagram of a kind of electronic equipment 500, as shown, the electronic equipment 500 includes application processor 510, memory
520, communication interface 530 and one or more programs 521, wherein one or more of programs 521 are stored in above-mentioned deposit
In reservoir 520, and it is configured to be executed by above-mentioned application processor 510, one or more of programs 521 include for executing
The instruction of following steps；
When the electronic equipment is in first state, the reference picture of the first quantity is acquired, the first state refers to
It is first that the predeterminable area of the display screen, which is provided with the first calibration box and the color of the inner surface of the first calibration box,
Color, the inner surface include medial surface of the first calibration box relative to the predeterminable area；
When the electronic equipment is in the second state, the reference picture of the second quantity is acquired, second state refers to
It is second that the predeterminable area of the display screen, which is provided with the second calibration box and the color of the inner surface of the second calibration box,
Color, first color are different with second color；
The gain of calibration factor figure is generated according to the reference picture of first quantity and the reference picture of second quantity.
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
Electronic equipment acquires reference picture by setting calibration box first in embodiment, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
In a possible example, in the ginseng of the reference picture according to first quantity and second quantity
It examines in terms of image generates the gain of calibration factor figure, the instruction in described program is specifically used for executing following operation: according to described the
The pixel value of each image generates the first reference calibrations image in the reference picture of one quantity；According to the reference of second quantity
The pixel value of each image generates the second reference calibrations image in image；According to the first reference calibrations image and described second
Reference calibrations image generates target alignment image；Normalized, which is executed, for the target alignment image obtains the calibration system
Number figure gain.
In a possible example, the pixel value of each image in the reference picture according to first quantity
Generate the first reference calibrations image；The second reference is generated according to the pixel value of each image in the reference picture of second quantity
In terms of calibrating image, the instruction in described program is specifically used for executing following operation: obtaining the reference picture of first quantity
Middle each image obtains the first quantity for each presetted pixel point in the corresponding pixel value of each presetted pixel point
Pixel value；The average value for calculating the first quantity pixel value obtains the first reference of each presetted pixel point averagely
Value；The first reference calibrations image is generated with reference to average value according to described the first of each presetted pixel point；Obtain institute
Each image is stated in the reference picture of the second quantity in the corresponding pixel value of each presetted pixel point, is obtained for described every
Second quantity pixel value of a presetted pixel point；Calculate the second quantity pixel value average value obtain it is described each pre-
If the second of pixel refers to average value；Described the is generated with reference to average value according to described the second of each presetted pixel point
Two reference calibrations images.
In a possible example, described according to the first reference calibrations image and the second reference calibrations figure
In terms of generating target alignment image, the instruction in described program is specifically used for executing following operation: by each default picture
Described the first of vegetarian refreshments subtracts described second with reference to average value and obtains the calibration difference of each presetted pixel point with reference to average value
Value；The target alignment image is generated according to the calibration difference of each presetted pixel point.
In a possible example, the school is obtained for target alignment image execution normalized described
In terms of quasi- coefficient figure gain, the instruction in described program is specifically used for executing following operation: calculating each presetted pixel point
The calibration difference average value；By the calibration difference of each presetted pixel point divided by the flat of the calibration difference
Mean value obtains the standard value of each presetted pixel point；Institute is generated according to the standard value of each presetted pixel point
State calibration factor figure gain.
In a possible example, in the ginseng of the reference picture according to first quantity and second quantity
After examining image generation calibration factor figure gain, the instruction in described program is also used to execute following operation: obtaining test finger
The first fingerprint image；The calibration pixel value of each pixel in the first fingerprint image is calculated according to preset formula, it is described
Preset formula includes: calibration pixel value=pixel difference * calibration factor figure gain, and the pixel difference is equal to described first
The pixel value of fingerprint image subtracts the pixel value of the second reference calibrations image；According to each picture in first fingerprint image
The calibration pixel value of vegetarian refreshments generates the second fingerprint image, and second fingerprint image is first fingerprint image removal back
Image after scape noise.
It is understood that electronic equipment is in order to realize the above functions, it comprises execute each corresponding hardware of function
Structure and/or software module.Those skilled in the art should be readily appreciated that, describe in conjunction with embodiment presented herein
Each exemplary unit and algorithm steps, the application can realize with the combining form of hardware or hardware and computer software.
Some function is executed in a manner of hardware or computer software driving hardware actually, specific application depending on technical solution
And design constraint.Professional technician can specifically realize described function to each using distinct methods
Can, but this realization is it is not considered that exceed scope of the present application.
The embodiment of the present application can carry out the division of functional unit according to above method example to electronic equipment, for example, can
With each functional unit of each function division of correspondence, two or more functions can also be integrated in a processing unit
In.Above-mentioned integrated unit both can take the form of hardware realization, can also realize in the form of software functional units.It needs
It is noted that be schematical, only a kind of logical function partition to the division of unit in the embodiment of the present application, it is practical real
It is current that there may be another division manner.
Fig. 6 is the functional unit composition block diagram of the calibrating installation 600 of fingerprint involved in the embodiment of the present application.The fingerprint
Calibrating installation 600 be applied to electronic equipment, the electronic equipment includes the predeterminable area of display screen and the relatively described display screen
The fingerprint mould group of setting, the calibrating installation 600 of the fingerprint include processing unit 601 and communication unit 602, wherein
The processing unit 601, for receiving the electronic equipment by the communication unit 602 and being in the first shape
When the information of state, the reference picture of the first quantity is acquired, the first state refers to that the predeterminable area of the display screen is set
The color for being equipped with the first calibration box and the inner surface of the first calibration box is the first color, and the inner surface includes described the
Medial surface of the one calibration box relative to the predeterminable area；And for receiving the electricity by the communication unit 602
When sub- equipment is in the information of the second state, the reference picture of the second quantity is acquired, second state refers to the display screen
The predeterminable area be provided with the second calibration box and it is described second calibration box inner surface color be the second color, it is described
First color is different with second color；And for according to the reference picture of first quantity and second quantity
Reference picture generates the gain of calibration factor figure.
Wherein, the calibrating installation 600 of the fingerprint can also include storage unit 603, for storing the journey of electronic equipment
Sequence code and data.The processing unit 601 can be processor, the communication unit 602 can be touching display screen or
Transceiver, storage unit 603 can be memory.
As can be seen that, when the electronic equipment is in first state, acquiring the ginseng of the first quantity in the embodiment of the present application
Examine image；When the electronic equipment is in the second state, the reference picture of the second quantity is acquired；Finally, according to described first
The reference picture of quantity and the reference picture of second quantity generate the gain of calibration factor figure.
Wherein, the first state refers to that the predeterminable area of the display screen is provided with the first calibration box and described
The color of the inner surface of first calibration box is the first color, and the inner surface includes the first calibration box relative to described default
The medial surface in region；Second state refers to that the predeterminable area of the display screen is provided with the second calibration box and described
The color of the inner surface of second calibration box is the second color, and first color is different with second color；As it can be seen that the application
Electronic equipment acquires reference picture by setting calibration box first in embodiment, avoids the interference of environment light, improves life
At calibration factor figure gain precision, and then improve and according to the calibration factor figure gain fingerprint image calibrated
Accuracy has achieved the purpose that the ambient noise for eliminating fingerprint image, contracting when so that handling collected fingerprint image
Small fingerprint mould group is carrying out the calibration error in fingerprint calibration process, improves the accuracy of fingerprint identification of fingerprint mould group.
In a possible example, in the ginseng of the reference picture according to first quantity and second quantity
It examines image and generates calibration factor figure gain aspect, the processing unit 601 is specifically used for: according to first quantity with reference to figure
The pixel value of each image generates the first reference calibrations image as in；According to each image in the reference picture of second quantity
Pixel value generate the second reference calibrations image；It is raw according to the first reference calibrations image and the second reference calibrations image
At target alignment image；Normalized, which is executed, for the target alignment image obtains the calibration factor figure gain.
In a possible example, the pixel value of each image in the reference picture according to first quantity
Generate the first reference calibrations image；The second reference is generated according to the pixel value of each image in the reference picture of second quantity
In terms of calibrating image, the processing unit 601 is specifically used for: each image is every in the reference picture of acquisition first quantity
The corresponding pixel value of a presetted pixel point, obtains the first quantity pixel value for each presetted pixel point；Calculate institute
The average value for stating the first quantity pixel value obtains the first of each presetted pixel point and refers to average value；According to described each
Described the first of presetted pixel point generates the first reference calibrations image with reference to average value；Obtain the reference of second quantity
Each image is in the corresponding pixel value of each presetted pixel point in image, obtains for each presetted pixel point
Two quantity pixel values；The average value for calculating the second quantity pixel value obtains the second ginseng of each presetted pixel point
Examine average value；The second reference calibrations image is generated with reference to average value according to described the second of each presetted pixel point.
In a possible example, described according to the first reference calibrations image and the second reference calibrations figure
In terms of generating target alignment image, the processing unit 601 is specifically used for: by described the first of each presetted pixel point
Described second, which is subtracted, with reference to average value obtains the calibration difference of each presetted pixel point with reference to average value；According to described each
The calibration difference of presetted pixel point generates the target alignment image.
In a possible example, the school is obtained for target alignment image execution normalized described
In terms of quasi- coefficient figure gain, the processing unit 601 is specifically used for: calculating the calibration difference of each presetted pixel point
Average value；By the calibration difference of each presetted pixel point divided by the average value of the calibration difference, obtain described
The standard value of each presetted pixel point；The calibration factor figure is generated according to the standard value of each presetted pixel point to increase
Benefit.
In a possible example, in the ginseng of the reference picture according to first quantity and second quantity
After examining image generation calibration factor figure gain, the processing unit 601 is also used to: obtaining the first fingerprint image of test finger
Picture；The calibration pixel value of each pixel in the first fingerprint image is calculated according to preset formula, the preset formula includes:
Calibration pixel value=pixel difference * calibration factor figure gain, the pixel difference are equal to the picture of first fingerprint image
Plain value subtracts the pixel value of the second reference calibrations image；According to the school of each pixel in first fingerprint image
Quasi- pixel value generates the second fingerprint image, and second fingerprint image is that first fingerprint image removes the figure after ambient noise
Picture.
The embodiment of the present application also provides a kind of computer storage medium, wherein computer storage medium storage is for electricity
The computer program of subdata exchange, the computer program make computer execute any as recorded in above method embodiment
Some or all of method step, above-mentioned computer include electronic equipment.
The embodiment of the present application also provides a kind of computer program product, and above-mentioned computer program product includes storing calculating
The non-transient computer readable storage medium of machine program, above-mentioned computer program are operable to that computer is made to execute such as above-mentioned side
Some or all of either record method step in method embodiment.The computer program product can be a software installation
Packet, above-mentioned computer includes electronic equipment.
It should be noted that for the various method embodiments described above, for simple description, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the application is not limited by the described action sequence because
According to the application, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art should also know
It knows, the embodiments described in the specification are all preferred embodiments, related actions and modules not necessarily the application
It is necessary.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed device, it can be by another way
It realizes.For example, the apparatus embodiments described above are merely exemplary, such as the division of said units, it is only a kind of
Logical function partition, there may be another division manner in actual implementation, such as multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit,
It can be electrical or other forms.
Above-mentioned unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If above-mentioned integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer-readable access to memory.Based on this understanding, the technical solution of the application substantially or
Person says that all or part of the part that contributes to existing technology or the technical solution can body in the form of software products
Reveal and, which is stored in a memory, including some instructions are used so that a computer equipment
(can be personal computer, server or network equipment etc.) executes all or part of each embodiment above method of the application
Step.And memory above-mentioned includes: USB flash disk, read-only memory (ROM, ReaP-Only Memory), random access memory
The various media that can store program code such as (RAM, RanPom Access Memory), mobile hard disk, magnetic or disk.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can store in computer-readable memory, and memory can
With include: flash disk, read-only memory (English: ReaP-Only Memory, referred to as: ROM), random access device (English:
RanPom Access Memory, referred to as: RAM), disk or CD etc..
The embodiment of the present application is described in detail above, specific case used herein to the principle of the application and
Embodiment is expounded, the description of the example is only used to help understand the method for the present application and its core ideas；
At the same time, for those skilled in the art can in specific embodiments and applications according to the thought of the application
There is change place, in conclusion the contents of this specification should not be construed as limiting the present application.
Claims (10)
1. a kind of calibration method of fingerprint, which is characterized in that be applied to electronic equipment, the electronic equipment includes display screen and phase
To the fingerprint mould group of the predeterminable area setting of the display screen, which comprises
When the electronic equipment is in first state, the reference picture of the first quantity is acquired, the first state refers to described
It is the first face that the predeterminable area of display screen, which is provided with the first calibration box and the color of the inner surface of the first calibration box,
Color, the inner surface include medial surface of the first calibration box relative to the predeterminable area；
When the electronic equipment is in the second state, the reference picture of the second quantity is acquired, second state refers to described
It is the second face that the predeterminable area of display screen, which is provided with the second calibration box and the color of the inner surface of the second calibration box,
Color, first color are different with second color；
The gain of calibration factor figure is generated according to the reference picture of first quantity and the reference picture of second quantity.
2. the method according to claim 1, wherein the reference picture according to first quantity and described
The reference picture of second quantity generates the gain of calibration factor figure, comprising:
The first reference calibrations image is generated according to the pixel value of each image in the reference picture of first quantity；
The second reference calibrations image is generated according to the pixel value of each image in the reference picture of second quantity；
Target alignment image is generated according to the first reference calibrations image and the second reference calibrations image；
Normalized, which is executed, for the target alignment image obtains the calibration factor figure gain.
3. according to the method described in claim 2, it is characterized in that, every width in the reference picture according to first quantity
The pixel value of image generates the first reference calibrations image；According to the pixel value of each image in the reference picture of second quantity
Generate the second reference calibrations image, comprising:
Each image in the reference picture of first quantity is obtained to be directed in the corresponding pixel value of each presetted pixel point
First quantity pixel value of each presetted pixel point；Calculate the first quantity pixel value average value obtain it is described
The first of each presetted pixel point refers to average value；It is generated according to described the first of each presetted pixel point with reference to average value
The first reference calibrations image；
Each image is obtained in the reference picture of second quantity in the corresponding pixel value of each presetted pixel point, is obtained
For the second quantity pixel value of each presetted pixel point；The average value for calculating the second quantity pixel value obtains
The second of each presetted pixel point refers to average value；Average value is referred to according to described the second of each presetted pixel point
Generate the second reference calibrations image.
4. according to the method described in claim 3, it is characterized in that, described according to the first reference calibrations image and described
Two reference calibrations images generate target alignment image, comprising:
By described the first of each presetted pixel point with reference to average value subtract described second obtain with reference to average value it is described every
The calibration difference of a presetted pixel point；
The target alignment image is generated according to the calibration difference of each presetted pixel point.
5. according to the method described in claim 4, it is characterized in that, described execute at normalization for the target alignment image
Reason obtains the calibration factor figure gain, comprising:
Calculate the average value of the calibration difference of each presetted pixel point；
By the calibration difference of each presetted pixel point divided by the average value of the calibration difference, obtain described each pre-
If the standard value of pixel；
The calibration factor figure gain is generated according to the standard value of each presetted pixel point.
6. method according to claim 1-5, which is characterized in that it is described according to first quantity with reference to figure
After picture and the reference picture of second quantity generate the gain of calibration factor figure, the method also includes:
Obtain the first fingerprint image of test finger；
The calibration pixel value of each pixel in the first fingerprint image, the preset formula packet are calculated according to preset formula
Include: calibration pixel value=pixel difference * calibration factor figure gain, the pixel difference are equal to first fingerprint image
Pixel value subtracts the pixel value of the second reference calibrations image；
According in first fingerprint image each pixel the calibration pixel value generate the second fingerprint image, described second
Fingerprint image is that first fingerprint image removes the image after ambient noise.
7. method according to claim 1-6, which is characterized in that the calibration box and the predeterminable area are constituted
Enclosure space, the enclosure space is for blocking environment light.
8. a kind of calibrating installation of fingerprint, which is characterized in that be applied to electronic equipment, the electronic equipment includes display screen and phase
To the fingerprint mould group of the predeterminable area setting of the display screen, the calibrating installation of the fingerprint includes processing unit and communication unit
Member, wherein
The processing unit, for receiving the information that the electronic equipment is in first state by the communication unit
When, the reference picture of the first quantity is acquired, the first state refers to that the predeterminable area of the display screen is provided with first
The color for calibrating box and the inner surface of the first calibration box is the first color, and the inner surface includes the first calibration box
Medial surface relative to the predeterminable area；And for being in the receiving the electronic equipment by the communication unit
When the information of two-state, the reference picture of the second quantity is acquired, second state refers to the preset areas of the display screen
It is the second color, first color and institute that domain, which is provided with the second calibration box and the color of the inner surface of the second calibration box,
State the second color difference；And for being generated according to the reference picture of first quantity and the reference picture of second quantity
Calibration factor figure gain.
9. a kind of electronic equipment, which is characterized in that including processor, memory, communication interface, and one or more programs,
One or more of programs are stored in the memory, and are configured to be executed by the processor, described program packet
Include the instruction for executing the step in the method according to claim 1 to 7.
10. a kind of computer readable storage medium, which is characterized in that storage is used for the computer program of electronic data interchange,
In, the computer program makes computer execute the method according to claim 1 to 7.
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| CN114359978A (en) * | 2021-03-03 | 2022-04-15 | 神盾股份有限公司 | Under-screen fingerprint sensing device and fingerprint sensing method |
| CN114077357A (en) * | 2021-07-02 | 2022-02-22 | 北京极豪科技有限公司 | Correction method, correction device, electronic device and readable storage medium |
| CN113343954A (en) * | 2021-08-05 | 2021-09-03 | 深圳阜时科技有限公司 | Offset calibration value detection method of curved surface fingerprint sensor and terminal equipment |
| CN113343954B (en) * | 2021-08-05 | 2021-12-28 | 深圳阜时科技有限公司 | Offset calibration value detection method of curved surface fingerprint sensor and terminal equipment |
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