CN108537167A - A kind of channel scanning method for fingerprint recognition - Google Patents
A kind of channel scanning method for fingerprint recognition Download PDFInfo
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- CN108537167A CN108537167A CN201810309062.9A CN201810309062A CN108537167A CN 108537167 A CN108537167 A CN 108537167A CN 201810309062 A CN201810309062 A CN 201810309062A CN 108537167 A CN108537167 A CN 108537167A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/1365—Matching; Classification
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
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- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
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- Collating Specific Patterns (AREA)
Abstract
The present invention discloses a kind of channel scanning method for fingerprint recognition, including step：Pass through image scanning sensor scan fingerprint image；Each pixel scanned is connected into multiple channels；Each pixel passes sequentially through the recognition result that each channel passes through amplification and is converted to each channel, and the recognition result in each channel has a difference value；Total variances value of each pixel under multiple channels is the sum of each channel difference value；To each continuous pixels multi collect, according to the product of times of collection and total variances value as pixel difference value；Conversion fingerprint image is carried out by pixel difference value, obtains identification image.The present invention can completely eliminate the difference between each scan channel, improve the accuracy and speed of fingerprint recognition.
Description
Technical field
The invention belongs to fingerprint identification technology fields, more particularly to a kind of channel scanning method for fingerprint recognition.
Background technology
Now, more next as a variety of biological identification technologies of representative using fingerprint recognition with internet, the development of mobile payment
More as the important means that cybertimes discriminate one's identification.
The fingerprint recognition product or scheme of complete set include three essential elements：Fingerprint sensor, fingerprint algorithm processing
Chip and fingerprint algorithm software.Fingerprint Identification Unit reads fingerprint, and there are many different modes, but particular technique mainly also relates to four
A function：It reads fingerprint image, extraction feature, preserve data and comparison.Somatic fingerprint is read by fingerprint reading systems
Then image will carry out original image preliminary processing, be allowed to apparent, then establish the spy of fingerprint by identification of fingerprint software
Levy data.Fingerprint Identification Unit spectroscopy, semiconductor transducer and capacitance sensor etc. on the market.Wherein capacitive sensing technology
Basic principle is its aberrant conduction fingerprint image according to the capacitance of live finger surface layer microgroove valley and a ridge.
Existing technology is using the data of one frame of access, then in the data for each pixel for checking each frame, profit
It is adjusted with algorithm, this method needs chip occupying area, because to use flash or OTP to carry out data storage, substantially
Degree increases the cost of chip.
Existing imaging sensor be by condenser type detect in the way of, including capacitor array, analog channel, digital processing
Unit, power supply unit and interface.Wherein capacitor array, such as 112*96, expression capacitor array has and laterally has 112 pixels, longitudinal
There are 96 pixels.Analog channel, that is, AFE+ADC arrays include what amplifier and ADC converters of front end.The main work(of the module
It can be the charge variation for detecting front capacitor array, amplify by amplifier, digital signal is converted to by ADC, so as to
Digital circuit later handles these signals.Digital signal that treated.It is transferred to master by SPI interface or other interfaces
Machine host.
But due in image sensor chip manufacturing process, although the same when being designed between multiple analog channels,
Due to the Gradient Effect caused by dopant concentration in manufacturing process, it is difficult to accomplish that each channel is just the same.Therefore, each
A channel is all and design value is all there are one deviation, leverages the precision of fingerprint recognition.
Invention content
To solve the above-mentioned problems, the present invention proposes a kind of channel scanning method for fingerprint recognition, can be complete
The difference between each scan channel is eliminated, the accuracy and speed of fingerprint recognition is improved.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of channel scanning method for fingerprint recognition,
Including step：
Pass through image scanning sensor scan fingerprint image；
Each pixel scanned is connected into multiple channels；
Each pixel passes sequentially through the recognition result that each channel passes through amplification and is converted to each channel, often
There is a difference value in the recognition result in a channel；
Total variances value of each pixel under multiple channels is the sum of each channel difference value；
To each continuous pixels multi collect, according to the product of times of collection and total variances value as pixel difference value；
Conversion fingerprint image is carried out by pixel difference value, obtains identification image.
Further, the times of collection is the integral multiple of channel number.
Further, the fingerprint image each pixel connect 8 channels include channel 1, channel 2, channel 3,
Channel 4, channel 5, channel 6, channel 7 and channel 8；Difference value for 8 channels be respectively Δ a, Δ b, Δ c, Δ d,
Δ e, Δ f, Δ g and Δ h；Times of collection is the integral multiple N in 8 channels, therefore pixel difference value is N* (Δ a+ Δ b+ Δ c+ Δs
d+Δe+Δf+Δg+Δh)。
Further, the channel includes amplifier and analog-digital converter, the pixel of the scanning passes sequentially through amplification
Device and analog-digital converter are amplified and are converted to recognition result.
Using the advantageous effect of the technical program：
Using scan mode of the present invention, to each pixel, the difference that channel is brought is all just the same, is all channel differences
It is different cumulative and, therefore the difference between each channel can be completely eliminated, improve the accuracy and speed of fingerprint recognition；
Using scan method of the present invention, system cost will not be increased, and the problem of eliminating channel difference can be reached.
Description of the drawings
Fig. 1 is a kind of channel scanning method flow diagram for fingerprint recognition of the present invention；
Fig. 2 is the scanning process schematic diagram in channel 1 in the embodiment of the present invention；
Fig. 3 is the scanning process schematic diagram in channel 2 in the embodiment of the present invention；
Fig. 4 is the scanning process schematic diagram in channel 8 in the embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made into one below in conjunction with the accompanying drawings
Step illustrates.
In the present embodiment, shown in Figure 1, the present invention proposes a kind of channel scanning method for fingerprint recognition,
Including step：
Pass through image scanning sensor scan fingerprint image；
Each pixel scanned is connected into multiple channels；
Each pixel passes sequentially through the recognition result that each channel passes through amplification and is converted to each channel, often
There is a difference value in the recognition result in a channel；
Total variances value of each pixel under multiple channels is the sum of each channel difference value；
To each continuous pixels multi collect, according to the product of times of collection and total variances value as pixel difference value；
Conversion fingerprint image is carried out by pixel difference value, obtains identification image.
As the prioritization scheme of above-described embodiment, the times of collection is the integral multiple of channel number.
As the prioritization scheme of above-described embodiment, as shown in figs 2-4, each pixel connection 8 of the fingerprint image
A channel includes channel 1, channel 2, channel 3, channel 4, channel 5, channel 6, channel 7 and channel 8；For 8 channels
Difference value is respectively Δ a, Δ b, Δ c, Δ d, Δ e, Δ f, Δ g and Δ h；Times of collection is the integral multiple N in 8 channels, therefore
Pixel difference value is N* (Δ a+ Δ b+ Δ c+ Δ d+ Δ e+ Δ f+ Δ g+ Δs h).
As the prioritization scheme of above-described embodiment, the channel includes amplifier and analog-digital converter, the picture of the scanning
Element passes sequentially through amplifier and analog-digital converter is amplified and is converted to recognition result.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of channel scanning method for fingerprint recognition, which is characterized in that including step：
Pass through image scanning sensor scan fingerprint image；
Each pixel scanned is connected into multiple channels；
Each pixel passes sequentially through the recognition result that each channel passes through amplification and is converted to each channel, Mei Getong
There is a difference value in the recognition result in road；
Total variances value of each pixel under multiple channels is the sum of each channel difference value；
To each continuous pixels multi collect, according to the product of times of collection and total variances value as pixel difference value；
Conversion fingerprint image is carried out by pixel difference value, obtains identification image.
2. a kind of channel scanning method for fingerprint recognition according to claim 1, which is characterized in that the acquisition time
Number is the integral multiple of channel number.
3. a kind of channel scanning method for fingerprint recognition according to claim 2, which is characterized in that the fingerprint image
It includes channel 1, channel 2, channel 3, channel 4, channel 5, channel 6, channel 7 and channel that each pixel of picture, which connects 8 channels,
8；Difference value for 8 channels is respectively Δ a, Δ b, Δ c, Δ d, Δ e, Δ f, Δ g and Δ h；Times of collection is 8
The integral multiple N in channel, therefore pixel difference value is N* (Δ a+ Δ b+ Δ c+ Δ d+ Δ e+ Δ f+ Δ g+ Δs h).
4. a kind of channel scanning method for fingerprint recognition according to claim 3, which is characterized in that the channel packet
Amplifier and analog-digital converter are included, the pixel of the scanning passes sequentially through amplifier and analog-digital converter is amplified and converts
To recognition result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309062.9A CN108537167A (en) | 2018-04-09 | 2018-04-09 | A kind of channel scanning method for fingerprint recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810309062.9A CN108537167A (en) | 2018-04-09 | 2018-04-09 | A kind of channel scanning method for fingerprint recognition |
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| CN108537167A true CN108537167A (en) | 2018-09-14 |
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| CN201810309062.9A Pending CN108537167A (en) | 2018-04-09 | 2018-04-09 | A kind of channel scanning method for fingerprint recognition |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474590A (en) * | 2002-06-28 | 2004-02-11 | �ֵܹ�ҵ��ʽ���� | Image reading device |
| CN105718851A (en) * | 2015-10-30 | 2016-06-29 | 深圳芯启航科技有限公司 | Fingerprint image filtering method and apparatus applied to fingerprint sensor |
| CN105718850A (en) * | 2015-10-21 | 2016-06-29 | 深圳芯启航科技有限公司 | Pixel point sampling method and apparatus applied to fingerprint sensor |
-
2018
- 2018-04-09 CN CN201810309062.9A patent/CN108537167A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1474590A (en) * | 2002-06-28 | 2004-02-11 | �ֵܹ�ҵ��ʽ���� | Image reading device |
| CN105718850A (en) * | 2015-10-21 | 2016-06-29 | 深圳芯启航科技有限公司 | Pixel point sampling method and apparatus applied to fingerprint sensor |
| CN105718851A (en) * | 2015-10-30 | 2016-06-29 | 深圳芯启航科技有限公司 | Fingerprint image filtering method and apparatus applied to fingerprint sensor |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20200901 Address after: Building 12-463, No. 29, buyue Road, Qiaolin street, Pukou District, Nanjing City, Jiangsu Province Applicant after: Nanjing Xinsi Technology Co.,Ltd. Address before: 610000 1 1, Tian Shun Street, hi tech Zone, Chengdu, Sichuan. Applicant before: CHENGDU GAOKE CHUANGZHI TECHNOLOGY Co.,Ltd. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180914 |
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