CN112528796A - Fingerprint signature acquisition system based on intelligent mobile terminal - Google Patents
Fingerprint signature acquisition system based on intelligent mobile terminal Download PDFInfo
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- CN112528796A CN112528796A CN202011397984.3A CN202011397984A CN112528796A CN 112528796 A CN112528796 A CN 112528796A CN 202011397984 A CN202011397984 A CN 202011397984A CN 112528796 A CN112528796 A CN 112528796A
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- 230000009466 transformation Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 6
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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
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06T11/00—2D [Two Dimensional] image generation
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Abstract
The invention provides a fingerprint signature acquisition system based on an intelligent mobile terminal, which belongs to the field of administrative law enforcement equipment and comprises three main parts, namely fingerprint signature acquisition software, the intelligent mobile terminal and Bluetooth fingerprint acquisition equipment. The fingerprint acquisition instrument is connected with the intelligent mobile terminal through a Bluetooth technology, data exchange is carried out through fingerprint signature acquisition software, the mobile intelligent terminal runs the fingerprint signature acquisition software, and original fingerprint signature acquisition is realized through a touch screen technology. The system can be used for daily administrative law enforcement inspection work of administrative law enforcement officers, realizes the field acquisition of administrative relatives fingerprints in the administrative law enforcement inspection process, and automatically uploads signature fingerprint information through fingerprint acquisition software and generates field processing documents containing relatives signature fingerprints.
Description
Technical Field
The invention relates to administrative law enforcement equipment, in particular to a fingerprint signature acquisition system based on an intelligent mobile terminal.
Background
In the existing on-site administrative law enforcement and inspection business process, law enforcement and inspection personnel cannot get rid of the traditional papery office mode. That is, the law enforcement officer needs to manually fill out the law enforcement examination record or the local penalty record on site, and manually sign and print by the administrative relatives. This is contrary to the principle of electronic and paperless law enforcement data of most e-government systems.
In order to solve the pain point, a brand-new digital handwriting and fingerprint acquisition system is required. And considering the difference in economy, technology and existing e-government system level among various places, various departments, the system must have the characteristics of low cost, high versatility and simple operation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a fingerprint signature acquisition system based on an intelligent mobile terminal, which has the characteristics of low cost, high universality and simple operation.
The technical scheme of the invention is as follows:
a fingerprint signature acquisition system based on an intelligent mobile terminal comprises three main parts, namely fingerprint signature acquisition software, the intelligent mobile terminal and Bluetooth fingerprint acquisition equipment;
the fingerprint acquisition instrument is connected with the intelligent mobile terminal through a Bluetooth technology, data exchange is carried out through fingerprint signature acquisition software, the mobile intelligent terminal runs the fingerprint signature acquisition software, and original fingerprint signature acquisition is realized through a touch screen technology.
Further, in the above-mentioned case,
the mobile intelligent terminal can be a device such as a mobile phone or a tablet personal computer which runs Andorid6.0+, is responsible for exchanging data with a Bluetooth fingerprint instrument, and comprises instruction sending and fingerprint data receiving, and is also responsible for signature acquisition and graphic data processing; the intelligent terminal has the connection capability and the touch screen capability of more than 4.0 of Bluetooth.
The Bluetooth fingerprint instrument is responsible for collecting fingerprint data and sending an original fingerprint image to the terminal for processing.
The Bluetooth fingerprint instrument is connected with the mobile intelligent terminal by using a Bluetooth 4.0 protocol, command sending and data exchange are carried out with the terminal by using a socket connection mode after Bluetooth connection is established, and the Bluetooth fingerprint instrument has the capacity of collecting 8bit256 × 288 resolution gray fingerprint information.
The fingerprint signature processing software is responsible for re-rendering the original dot matrix data, including Bezier curve transformation and HSV-RGB color model conversion, and generating a finally processed image.
Further, in the above-mentioned case,
fingerprint signature processing software, comprising
1) Signature collection
Capturing of signature traces and connection of lines by processing TOUCH _ DOWN, TOUCH _ UP, TOUCH _ MOVE using TOUCH events of Android SDK
The signature trajectory algorithm adopts two branches for computational rendering:
1) when the X-axis distance or the Y-axis distance of the two points is less than or equal to 3 pixels, the two points are directly connected by a straight line.
2) When the X-axis distance or the Y-axis distance of the two points is larger than 3 pixels, the TOUCH points are actually connected by a quadratic Bezier curve when the system renders the signature track, and when the quadratic Bezier curve is connected, the TOUCH points are taken as control points, and the middle points are taken as corresponding starting points and end points.
2) Fingerprint processing
The software is responsible for starting the Bluetooth equipment of the terminal, scanning the surrounding Bluetooth fingerprint instruments and realizing socket connection.
The basic control instruction of the Bluetooth fingerprint instrument is a 9-byte instruction:
1) the first 4 bytes are always 0x46, 0x54, 0x0 and 0x0 as the identification command of the fingerprint instrument;
2) byte 5 is an instruction code, here using only get fingerprint instruction 0x 30;
3) the two bytes 6 and 7 are the instruction parameter length N, the 6 bytes are the lower 8 bits of the instruction parameter length, and the 7 bytes are the upper 8 bits of the instruction parameter length. The instruction for acquiring the fingerprint information is a parameter-free instruction, so that the 6 and 7 bytes are 0;
4) the subsequent N bytes are instruction parameters, and the instruction has no parameters, so the instruction does not need to be filled in;
5) the last two bytes are check codes, the algorithm is to sum the leading bytes of the check code bytes and perform AND operation with 0xFF, the second last bit is the lower 8 bits of the check code, and the last bit is the upper 8 bits of the check code.
Firstly, a bitmap file with 256 × 288 resolution is constructed according to a 256-color BMP bitmap format, and a hue 0 is divided into 256 levels of brightness through an HSV color model and is converted into RGB as palette colors of the BMP, so that a 'red' fingerprint file can be constructed.
The invention has the advantages that
The system can be used for daily administrative law enforcement inspection work of administrative law enforcement officers, realizes the field acquisition of administrative relatives fingerprints in the administrative law enforcement inspection process, and automatically uploads signature fingerprint information through fingerprint acquisition software and generates field processing documents containing relatives signature fingerprints.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a diagram of a Bluetooth command format;
FIG. 3 shows RGB and HSV color conversion and palette construction core code.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
The invention discloses a signature fingerprint acquisition system based on an intelligent mobile terminal, which aims to realize electronic signature acquisition, fingerprint acquisition, uploading and mapping of an electronic signature and a fingerprint to a Word document through a portable mobile intelligent terminal, a Bluetooth fingerprint acquisition instrument and signature fingerprint acquisition processing software. The system has the following technical scheme:
1. the mobile intelligent terminal comprises:
the mobile intelligent terminal mainly refers to an intelligent mobile phone or a tablet computer based on a system above 6.0 of android, and the intelligent terminal must have connection capacity and touch screen capacity above 4.0 of Bluetooth.
2. Bluetooth fingerprint appearance:
the Bluetooth fingerprint instrument is connected with the mobile intelligent terminal by using a Bluetooth 4.0 protocol, command sending and data exchange can be carried out with the terminal by using a socket connection mode after Bluetooth connection is established, and the Bluetooth fingerprint instrument has the capacity of collecting 8bit256 × 288 resolution gray fingerprint information.
3. Signature fingerprint processing software:
1) signature collection
Using the TOUCH event of the Android SDK, capture of the signature trace and connection of the line are achieved by processing TOUCH _ DOWN, TOUCH _ UP, and TOUCH _ MOVE.
Considering the problem of the sampling rate of an actual hardware touch screen, in order to eliminate discordance caused by rigid straight line connection between points, a track algorithm adopts two branches to perform calculation rendering:
1) when the X-axis distance or the Y-axis distance of the two points is less than or equal to 3 pixels, the two points are directly connected by a straight line.
2) When the X-axis distance or the Y-axis distance of the two points is larger than 3 pixels, the TOUCH points are actually connected by a quadratic Bezier curve when the system renders the signature track, and when the quadratic Bezier curve is connected, the TOUCH points are taken as control points, and the middle points are taken as corresponding starting points and end points.
2) Fingerprint processing
The software is responsible for starting the Bluetooth equipment of the terminal, scanning the surrounding Bluetooth fingerprint instruments and realizing socket connection. The basic control instruction of the Bluetooth fingerprint instrument is a 9-byte instruction:
1) the first 4 bytes are always 0x46, 0x54, 0x0 and 0x0 as the identification command of the fingerprint instrument;
2) byte 5 is an instruction code, here using only get fingerprint instruction 0x 30;
3) the two bytes 6 and 7 are the instruction parameter length N, the 6 bytes are the lower 8 bits of the instruction parameter length, and the 7 bytes are the upper 8 bits of the instruction parameter length. The instruction for acquiring the fingerprint information is a parameter-free instruction, so that the 6 and 7 bytes are 0;
4) the subsequent N bytes are instruction parameters, and the instruction has no parameters, so the instruction does not need to be filled in;
5) the last two bytes are check codes, the algorithm is to sum the leading bytes of the check code bytes and perform AND operation with 0xFF, the second last bit is the lower 8 bits of the check code, and the last bit is the upper 8 bits of the check code.
Since the fingerprint acquisition instrument acquires original 8bit gray matrix information without format, the original fingerprint image must be processed for easy observation and the same as the real "red" fingerprint (inkpad fingerprint). The system firstly constructs a bitmap file with 256 × 288 resolution according to a 256-color BMP bitmap format, divides the tone 0 into 256 levels of brightness through an HSV color model, and converts the brightness into RGB as the palette color of the BMP, thereby constructing a 'red' fingerprint file.
The above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A fingerprint signature collecting system based on an intelligent mobile terminal is characterized in that,
the system consists of three main parts, namely fingerprint signature acquisition software, an intelligent mobile terminal and Bluetooth fingerprint acquisition equipment;
the fingerprint acquisition instrument is connected with the intelligent mobile terminal through a Bluetooth technology, data exchange is carried out through fingerprint signature acquisition software, the mobile intelligent terminal runs the fingerprint signature acquisition software, and original fingerprint signature acquisition is realized through a touch screen technology.
2. The system of claim 1,
the mobile intelligent terminal can be a device such as a mobile phone or a tablet personal computer which runs Andorid6.0+, is responsible for exchanging data with a Bluetooth fingerprint instrument, and comprises instruction sending and fingerprint data receiving, and is responsible for signature acquisition and graphic data processing.
3. The system of claim 2,
the intelligent terminal has the connection capability and the touch screen capability of more than 4.0 of Bluetooth.
4. The system of claim 1,
the Bluetooth fingerprint instrument is responsible for collecting fingerprint data and sending an original fingerprint image to the terminal for processing.
5. The system of claim 4,
the Bluetooth fingerprint instrument is connected with the mobile intelligent terminal by using a Bluetooth 4.0 protocol, command sending and data exchange are carried out with the terminal by using a socket connection mode after Bluetooth connection is established, and the Bluetooth fingerprint instrument has the capacity of collecting 8bit256 × 288 resolution gray fingerprint information.
6. The system of claim 1,
the fingerprint signature processing software is responsible for re-rendering the original dot matrix data, including Bezier curve transformation and HSV-RGB color model conversion, and generating a finally processed image.
7. The system of claim 6,
fingerprint signature processing software, comprising
1) Signature collection
Capturing of signature traces and connection of lines by processing TOUCH _ DOWN, TOUCH _ UP, TOUCH _ MOVE using TOUCH events of Android SDK
2) Fingerprint processing
The software is responsible for starting the Bluetooth equipment of the terminal, scanning the surrounding Bluetooth fingerprint instruments and realizing socket connection.
8. The system of claim 7,
the signature trajectory algorithm adopts two branches for computational rendering:
1) when the X-axis distance or the Y-axis distance of the two points is less than or equal to 3 pixels, the two points are directly connected by a straight line.
2) When the X-axis distance or the Y-axis distance of the two points is larger than 3 pixels, the TOUCH points are actually connected by a quadratic Bezier curve when the system renders the signature track, and when the quadratic Bezier curve is connected, the TOUCH points are taken as control points, and the middle points are taken as corresponding starting points and end points.
9. The system of claim 7,
the basic control instruction of the Bluetooth fingerprint instrument is a 9-byte instruction:
1) the first 4 bytes are always 0x46, 0x54, 0x0 and 0x0 as the identification command of the fingerprint instrument;
2) byte 5 is an instruction code, here using only get fingerprint instruction 0x 30;
3) the two bytes 6 and 7 are the instruction parameter length N, the 6 bytes are the lower 8 bits of the instruction parameter length, and the 7 bytes are the upper 8 bits of the instruction parameter length. The instruction for acquiring the fingerprint information is a parameter-free instruction, so that the 6 and 7 bytes are 0;
4) the subsequent N bytes are instruction parameters, and the instruction has no parameters, so the instruction does not need to be filled in;
5) the last two bytes are check codes, the algorithm is to sum the leading bytes of the check code bytes and perform AND operation with 0xFF, the second last bit is the lower 8 bits of the check code, and the last bit is the upper 8 bits of the check code.
10. The system of claim 9,
firstly, a bitmap file with 256 × 288 resolution is constructed according to a 256-color BMP bitmap format, and a fingerprint file can be constructed by dividing the hue 0 into 256 levels of brightness and converting the brightness into RGB as the color palette of the BMP through an HSV color model.
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| CN202011397984.3A CN112528796A (en) | 2020-12-04 | 2020-12-04 | Fingerprint signature acquisition system based on intelligent mobile terminal |
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| CN111639521A (en) * | 2020-04-14 | 2020-09-08 | 北京迈格威科技有限公司 | Fingerprint synthesis method and device, electronic equipment and computer readable storage medium |
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2020
- 2020-12-04 CN CN202011397984.3A patent/CN112528796A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680047A (en) * | 2015-01-23 | 2015-06-03 | 合肥联宝信息技术有限公司 | Method and device for electronic authentication |
| CN105550257A (en) * | 2015-12-10 | 2016-05-04 | 杭州当虹科技有限公司 | Audio and video fingerprint identification method and tampering prevention system based on audio and video fingerprint streaming media |
| CN106203039A (en) * | 2016-07-04 | 2016-12-07 | 深圳市亚略特生物识别科技有限公司 | Fingerprint digital autograph device and e commerce transactions system |
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Application publication date: 20210319 |