CN109118240B - Instant payment system based on fingerprint acquisition - Google Patents
Instant payment system based on fingerprint acquisition Download PDFInfo
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- CN109118240B CN109118240B CN201810944768.2A CN201810944768A CN109118240B CN 109118240 B CN109118240 B CN 109118240B CN 201810944768 A CN201810944768 A CN 201810944768A CN 109118240 B CN109118240 B CN 109118240B
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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
- G06V40/1347—Preprocessing; Feature extraction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/401—Transaction verification
- G06Q20/4014—Identity check for transactions
- G06Q20/40145—Biometric identity checks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/10—Image enhancement or restoration by non-spatial domain filtering
Abstract
The invention relates to an instant payment system based on fingerprint acquisition, which comprises: the subway payment control equipment is arranged on the subway payment control equipment and used for acquiring a payment request person fingerprint image and outputting a corresponding payment fingerprint image; the liquid crystal display screen is arranged on the subway payment control equipment and used for displaying the deviation angle on site when the deviation angle is received; and the gray level analysis equipment is connected with the fingerprint extraction equipment and is used for receiving the payment fingerprint image, detecting the gray level balance degree of the payment fingerprint image so as to obtain the current balance degree corresponding to the payment fingerprint image and outputting the current balance degree corresponding to the payment fingerprint image.
Description
Technical Field
The invention relates to the field of fingerprint fee deduction, in particular to an instant payment system based on fingerprint acquisition.
Background
The fingerprint extraction comprises a center (upper and lower) and triangular points (left and right), and the like, and the minutiae of the fingerprint mainly comprise a starting point, an end point, a combination point and a bifurcation point of a ridge line. Feature point information (termination point and bifurcation point.) of the fingerprint is extracted from the preprocessed image, wherein the information mainly comprises parameters such as type, coordinate, direction and the like. Minutiae features in a fingerprint, typically include end points, bifurcation points, outliers, short bifurcations, rings, and the like. While the ridge endpoints and bifurcation points occur most frequently, most stably, and easily captured in the fingerprint. The two types of extraction points can be used for matching the fingerprint characteristics, and the similarity degree of the characteristic extraction result and the stored characteristic template is calculated.
Disclosure of Invention
In order to solve the technical problem of insufficient precision of current fingerprint deduction, the invention provides an instant payment system based on fingerprint acquisition, which determines whether fingerprint deduction operation can be executed or not based on the angle of the deviation of the identified fingerprint outline from a vertical plane, and allows fingerprint payment operation when the angle reaches a preset range, otherwise, carries out on-site reminding, improves the subway on-site payment efficiency, reduces subway managers and saves the operation cost of a subway manager; meanwhile, a set of pointed detection mechanism is designed for the image, and on the basis of the pointed detection, the mode customization is carried out on the frequency domain processing of the image, so that the frequency filtering effect of the image is improved.
According to an aspect of the present invention, there is provided an instant payment system based on fingerprint collection, the system including: the subway payment control equipment is arranged on the subway payment control equipment and used for acquiring a payment request person fingerprint image and outputting a corresponding payment fingerprint image; the liquid crystal display screen is arranged on the subway payment control equipment and used for displaying the deviation angle on site when the deviation angle is received; and the gray level analysis equipment is connected with the fingerprint extraction equipment and is used for receiving the payment fingerprint image, detecting the gray level balance degree of the payment fingerprint image so as to obtain the current balance degree corresponding to the payment fingerprint image and outputting the current balance degree corresponding to the payment fingerprint image.
More specifically, in the subway on-site payment system, still include:
the equalization processing device is connected with the gray scale analysis device and is used for executing gray scale equalization action on the current equalization degree corresponding to the paid fingerprint image when the current equalization degree corresponding to the paid fingerprint image is not in a preset equalization degree range, so that the current equalization degree corresponding to the paid fingerprint image is in the preset equalization degree range; after executing the gray scale balancing action, the balancing processing equipment outputs a gray scale balancing image corresponding to the paid fingerprint image; and the sharp grade analysis device is connected with the equalization processing device and is used for receiving the gray scale equalization image, acquiring the pixel value and the coordinate position of each pixel point in the gray scale equalization image, and determining the sharp grade of the gray scale equalization image based on the pixel value and the coordinate position of each pixel point in the gray scale equalization image.
More specifically, in the subway on-site payment system, still include:
the data conversion equipment is used for receiving the gray level equilibrium image and carrying out time-frequency conversion on the gray level equilibrium image to obtain a corresponding frequency domain matrix; the parameter extraction device is respectively connected with the sharp grade analysis device and the data conversion device and is used for receiving the frequency domain matrix and the sharp grade and determining a corresponding frequency threshold value based on the sharp grade, wherein the determined corresponding frequency threshold value in the parameter extraction device is in a direct proportion relation with the sharp grade; the frequency domain value processing device is respectively connected with the parameter extraction device and the data conversion device and is used for calculating the square sum of the abscissa and the ordinate of each point in the frequency domain matrix, keeping the original frequency domain value of the point when the square value of the square sum is less than or equal to the frequency threshold value, and setting the frequency domain value of the point to be zero when the square value of the square sum is greater than the frequency threshold value; the inverse conversion equipment is connected with the frequency domain value processing equipment and used for receiving the frequency domain value of each point in the frequency domain matrix processed by the frequency domain value processing equipment, forming a processed data matrix based on the frequency domain value processed by each point, and performing frequency-time conversion on the data matrix to obtain an inverse conversion image corresponding to the gray scale equilibrium image; the instant filtering equipment is connected with the reverse conversion equipment and is used for receiving the reverse conversion image, executing transform domain filtering processing on the reverse conversion image to obtain a corresponding transform domain filtering image and outputting the transform domain filtering image; the deviation detection device is connected with the instant filtering device and used for receiving the transform domain filtering image, extracting the fingerprint outline in the transform domain filtering image, and determining the angle of the fingerprint outline deviating from the vertical plane based on the extracted fingerprint outline to be output as a deviation angle; the real-time money deducting equipment is connected with the deviation detection equipment and is used for identifying the fingerprint characteristics corresponding to the fingerprint outline when the deviation angle does not exceed a limit value and carrying out real-time money deducting action based on the bank card number corresponding to the fingerprint characteristics; wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image comprises: determining pixel points of which the pixel values exceed the mean value of all the pixel values of the field pixel points in the gray-scale equilibrium image to serve as abrupt change pixel points, taking a plurality of abrupt change pixel points forming a continuous curve as a sharp curve, and counting the number of the sharp curves in the gray-scale equilibrium image; wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image further includes: determining a sharpness level of the gray-scale equalized image based on a number of sharpness curves in the gray-scale equalized image, the number of sharpness curves in the gray-scale equalized image being proportional to the sharpness level of the gray-scale equalized image.
More specifically, in the subway site payment system: the sharpness grade analysis device is further configured to issue an image smoothing signal when the number of sharpness curves is zero.
More specifically, in the subway site payment system: the sharpness level analyzing device, the data converting device, the parameter extracting device, and the frequency domain value processing device are integrated on the same integrated circuit board.
More specifically, in the subway site payment system: the instant filtering equipment, the deviation detection equipment and the real-time deduction equipment are all arranged on subway payment control equipment.
More specifically, in the subway site payment system: the deviation detection equipment is connected with the liquid crystal display screen and used for sending the deviation angle to the liquid crystal display screen when the deviation angle exceeds a limit amount.
More specifically, in the subway site payment system: and the real-time deduction equipment is also used for stopping the identification of the fingerprint features corresponding to the fingerprint profiles when the deviation angle exceeds a limited amount.
Drawings
Embodiments of the invention will now be described with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a subway site payment system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The fingerprint extraction is a precise electronic instrument for identity recognition by utilizing different characteristics of human fingerprints, and the working principle comprises four functions of fingerprint image acquisition, fingerprint feature extraction, data storage and fingerprint comparison. Wherein, reading fingerprint images is the most important function of the fingerprint collector. By imaging with uneven patterns of a finger fingerprint, we generally refer to the raised patterns as "ridges" and the depressed pattern formation as "valleys", and the process of fingerprint acquisition is essentially that of fingerprint imaging.
The principle is that different optical or current resistance feedback signals are obtained according to the difference of the geometrical characteristics, the physical characteristics and the biological characteristics of ridges and valleys, a fingerprint image is drawn by using image processing algorithms of different algorithms according to the magnitude of the feedback signals, and then fingerprint characteristics are extracted and fingerprint characteristic codes are compared on the basis of the fingerprint image through fingerprint identification algorithm software.
In order to overcome the defects, the invention builds an instant payment system based on fingerprint acquisition. The subway site payment system solves the corresponding technical problem.
Fig. 1 is a schematic structural diagram of a subway site payment system according to an embodiment of the present invention, where the system includes:
the subway payment control equipment comprises fingerprint extraction equipment 1, subway payment control equipment 3 and a payment processing system, wherein the fingerprint extraction equipment 1 is arranged on the subway payment control equipment 3 and is used for collecting fingerprint images of payment requesters so as to output corresponding payment fingerprint images;
the liquid crystal display screen 2 is arranged on the subway payment control equipment and is used for displaying the deviation angle on site when receiving the deviation angle;
the payment base 4 is arranged below the subway payment control equipment and is used for supporting the subway payment control equipment;
and the gray level analysis equipment is connected with the fingerprint extraction equipment and is used for receiving the payment fingerprint image, detecting the gray level balance degree of the payment fingerprint image so as to obtain the current balance degree corresponding to the payment fingerprint image and outputting the current balance degree corresponding to the payment fingerprint image.
Next, a detailed description of the subway site payment system according to the present invention will be further described.
In the subway site payment system, still include:
the equalization processing device is connected with the gray scale analysis device and is used for executing gray scale equalization action on the current equalization degree corresponding to the paid fingerprint image when the current equalization degree corresponding to the paid fingerprint image is not in a preset equalization degree range, so that the current equalization degree corresponding to the paid fingerprint image is in the preset equalization degree range; after executing the gray scale balancing action, the balancing processing equipment outputs a gray scale balancing image corresponding to the paid fingerprint image;
and the sharp grade analysis device is connected with the equalization processing device and is used for receiving the gray scale equalization image, acquiring the pixel value and the coordinate position of each pixel point in the gray scale equalization image, and determining the sharp grade of the gray scale equalization image based on the pixel value and the coordinate position of each pixel point in the gray scale equalization image.
In the subway site payment system, still include:
the data conversion equipment is used for receiving the gray level equilibrium image and carrying out time-frequency conversion on the gray level equilibrium image to obtain a corresponding frequency domain matrix;
the parameter extraction device is respectively connected with the sharp grade analysis device and the data conversion device and is used for receiving the frequency domain matrix and the sharp grade and determining a corresponding frequency threshold value based on the sharp grade, wherein the determined corresponding frequency threshold value in the parameter extraction device is in a direct proportion relation with the sharp grade;
the frequency domain value processing device is respectively connected with the parameter extraction device and the data conversion device and is used for calculating the square sum of the abscissa and the ordinate of each point in the frequency domain matrix, keeping the original frequency domain value of the point when the square value of the square sum is less than or equal to the frequency threshold value, and setting the frequency domain value of the point to be zero when the square value of the square sum is greater than the frequency threshold value;
the inverse conversion equipment is connected with the frequency domain value processing equipment and used for receiving the frequency domain value of each point in the frequency domain matrix processed by the frequency domain value processing equipment, forming a processed data matrix based on the frequency domain value processed by each point, and performing frequency-time conversion on the data matrix to obtain an inverse conversion image corresponding to the gray scale equilibrium image;
the instant filtering equipment is connected with the reverse conversion equipment and is used for receiving the reverse conversion image, executing transform domain filtering processing on the reverse conversion image to obtain a corresponding transform domain filtering image and outputting the transform domain filtering image;
the deviation detection device is connected with the instant filtering device and used for receiving the transform domain filtering image, extracting the fingerprint outline in the transform domain filtering image, and determining the angle of the fingerprint outline deviating from the vertical plane based on the extracted fingerprint outline to be output as a deviation angle;
the real-time money deducting equipment is connected with the deviation detection equipment and is used for identifying the fingerprint characteristics corresponding to the fingerprint outline when the deviation angle does not exceed a limit value and carrying out real-time money deducting action based on the bank card number corresponding to the fingerprint characteristics;
wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image comprises: determining pixel points of which the pixel values exceed the mean value of all the pixel values of the field pixel points in the gray-scale equilibrium image to serve as abrupt change pixel points, taking a plurality of abrupt change pixel points forming a continuous curve as a sharp curve, and counting the number of the sharp curves in the gray-scale equilibrium image;
wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image further includes: determining a sharpness level of the gray-scale equalized image based on a number of sharpness curves in the gray-scale equalized image, the number of sharpness curves in the gray-scale equalized image being proportional to the sharpness level of the gray-scale equalized image.
In the subway site payment system: the sharpness grade analysis device is further configured to issue an image smoothing signal when the number of sharpness curves is zero.
In the subway site payment system: the sharpness level analyzing device, the data converting device, the parameter extracting device, and the frequency domain value processing device are integrated on the same integrated circuit board.
In the subway site payment system: the instant filtering equipment, the deviation detection equipment and the real-time deduction equipment are all arranged on subway payment control equipment.
In the subway site payment system: the deviation detection equipment is connected with the liquid crystal display screen and used for sending the deviation angle to the liquid crystal display screen when the deviation angle exceeds a limit amount.
In the subway site payment system: and the real-time deduction equipment is also used for stopping the identification of the fingerprint features corresponding to the fingerprint profiles when the deviation angle exceeds a limited amount.
In addition, in the instant filtering device, image filtering, namely, suppressing the noise of the target image under the condition of keeping the detail features of the image as much as possible, is an indispensable operation in image preprocessing, and the effectiveness and reliability of subsequent image processing and analysis are directly affected by the quality of the processing effect.
Due to the imperfections of the imaging system, the transmission medium, and the recording device, the digital images are often contaminated by various noises during the formation, transmission, and recording processes thereof. In addition, noise may also be introduced into the resulting image at some point in the image processing when the input image object is not as expected. These noises often appear as an isolated pixel or block of pixels on the image that causes a strong visual effect. In general, the noise signal is not correlated with the object to be studied-it appears in the form of useless information, disturbing the observable information of the image. For digital image signals, the noise table is more or less extreme values, and the extreme values act on the real gray values of image pixels through addition and subtraction to cause bright and dark point interference on the image, so that the image quality is greatly reduced, and the follow-up work of image restoration, segmentation, feature extraction, image identification and the like is influenced. Two basic issues must be considered to construct an effective noise suppression filter: the method can effectively remove the noise in the target and the background, and can well protect the shape, the size and the specific geometric and topological structure characteristics of the image target.
By adopting the subway site payment system, aiming at the technical problem that the fingerprint deduction in the prior art cannot meet the requirements of the current application scene, whether the fingerprint deduction operation can be executed or not is determined based on the angle of the recognized fingerprint outline deviating from the vertical plane, and when the angle reaches the preset range, the fingerprint payment operation is allowed to be carried out, otherwise, the site reminding is carried out, so that the subway site payment efficiency is improved, subway managers are reduced, and the operation cost of a subway manager is saved; meanwhile, a set of pointed detection mechanism is designed for the image, and on the basis of pointed detection, mode customization is carried out on the frequency domain processing of the image, so that the frequency filtering effect of the image is improved, and the technical problem is solved.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (6)
1. An instant payment system based on fingerprint collection, the system comprising:
the subway payment control equipment is arranged on the subway payment control equipment and used for acquiring a payment request person fingerprint image and outputting a corresponding payment fingerprint image;
the liquid crystal display screen is arranged on the subway payment control equipment and used for displaying the deviation angle on site when the deviation angle is received;
the gray level analyzing equipment is connected with the fingerprint extracting equipment and is used for receiving the payment fingerprint image, detecting the gray level balance degree of the payment fingerprint image so as to obtain the current balance degree corresponding to the payment fingerprint image and outputting the current balance degree corresponding to the payment fingerprint image;
the equalization processing device is connected with the gray scale analysis device and is used for executing gray scale equalization action on the current equalization degree corresponding to the paid fingerprint image when the current equalization degree corresponding to the paid fingerprint image is not in a preset equalization degree range, so that the current equalization degree corresponding to the paid fingerprint image is in the preset equalization degree range; after executing the gray scale balancing action, the balancing processing equipment outputs a gray scale balancing image corresponding to the paid fingerprint image;
the sharp grade analysis device is connected with the equalization processing device and used for receiving the gray scale equalization image, acquiring the pixel value and the coordinate position of each pixel point in the gray scale equalization image, and determining the sharp grade of the gray scale equalization image based on the pixel value and the coordinate position of each pixel point in the gray scale equalization image;
the data conversion equipment is used for receiving the gray level equilibrium image and carrying out time-frequency conversion on the gray level equilibrium image to obtain a corresponding frequency domain matrix;
the parameter extraction device is respectively connected with the sharp grade analysis device and the data conversion device and is used for receiving the frequency domain matrix and the sharp grade and determining a corresponding frequency threshold value based on the sharp grade, wherein the determined corresponding frequency threshold value in the parameter extraction device is in a direct proportion relation with the sharp grade;
the frequency domain value processing device is respectively connected with the parameter extraction device and the data conversion device and is used for calculating the square sum of the abscissa and the ordinate of each point in the frequency domain matrix, keeping the original frequency domain value of the point when the square value of the square sum is less than or equal to the frequency threshold value, and setting the frequency domain value of the point to be zero when the square value of the square sum is greater than the frequency threshold value;
the inverse conversion equipment is connected with the frequency domain value processing equipment and used for receiving the frequency domain value of each point in the frequency domain matrix processed by the frequency domain value processing equipment, forming a processed data matrix based on the frequency domain value processed by each point, and performing frequency-time conversion on the data matrix to obtain an inverse conversion image corresponding to the gray scale equilibrium image;
the instant filtering equipment is connected with the reverse conversion equipment and is used for receiving the reverse conversion image, executing transform domain filtering processing on the reverse conversion image to obtain a corresponding transform domain filtering image and outputting the transform domain filtering image;
the deviation detection device is connected with the instant filtering device and used for receiving the transform domain filtering image, extracting the fingerprint outline in the transform domain filtering image, and determining the angle of the fingerprint outline deviating from the vertical plane based on the extracted fingerprint outline to be output as a deviation angle;
the real-time money deducting equipment is connected with the deviation detection equipment and is used for identifying the fingerprint characteristics corresponding to the fingerprint outline when the deviation angle does not exceed a limit value and carrying out real-time money deducting action based on the bank card number corresponding to the fingerprint characteristics;
wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image comprises: determining pixel points of which the pixel values exceed the mean value of all the pixel values of the field pixel points in the gray-scale equilibrium image to serve as abrupt change pixel points, taking a plurality of abrupt change pixel points forming a continuous curve as a sharp curve, and counting the number of the sharp curves in the gray-scale equilibrium image;
wherein, in the sharpness level analysis device, determining the sharpness level of the gray-scale equilibrium image based on the pixel value and the coordinate position of each pixel point in the gray-scale equilibrium image further includes: determining a sharpness level of the gray-scale equalized image based on a number of sharpness curves in the gray-scale equalized image, the number of sharpness curves in the gray-scale equalized image being proportional to the sharpness level of the gray-scale equalized image.
2. The system of claim 1, wherein:
the sharpness grade analysis device is further configured to issue an image smoothing signal when the number of sharpness curves is zero.
3. The system of claim 1, wherein:
the sharpness level analyzing device, the data converting device, the parameter extracting device, and the frequency domain value processing device are integrated on the same integrated circuit board.
4. The system of claim 1, wherein:
the instant filtering equipment, the deviation detection equipment and the real-time deduction equipment are all arranged on subway payment control equipment.
5. The system of claim 1, wherein:
the deviation detection equipment is connected with the liquid crystal display screen and used for sending the deviation angle to the liquid crystal display screen when the deviation angle exceeds a limit amount.
6. The system of claim 1, wherein:
and the real-time deduction equipment is also used for stopping the identification of the fingerprint features corresponding to the fingerprint profiles when the deviation angle exceeds a limited amount.
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| CN108108977A (en) * | 2017-12-28 | 2018-06-01 | 广州品唯软件有限公司 | Fingerprint method of payment, device, system and storage medium |
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| US9613428B2 (en) * | 2014-11-07 | 2017-04-04 | Fingerprint Cards Ab | Fingerprint authentication using stitch and cut |
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| CN101833647A (en) * | 2009-03-11 | 2010-09-15 | 中国科学院自动化研究所 | Acquisition device and processing method of palm print image |
| CN104484652A (en) * | 2014-12-15 | 2015-04-01 | 广西科技大学 | Method for fingerprint recognition |
| CN105930777A (en) * | 2016-04-13 | 2016-09-07 | 时建华 | ATM (Automatic Teller Machine) using fingerprint for identification |
| CN107066991A (en) * | 2017-05-10 | 2017-08-18 | 上海为然环保科技有限公司 | A kind of fingerprint verifying apparatus |
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