CN108648307A - A kind of access control system of applying electronic password - Google Patents
A kind of access control system of applying electronic password Download PDFInfo
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- CN108648307A CN108648307A CN201810436228.3A CN201810436228A CN108648307A CN 108648307 A CN108648307 A CN 108648307A CN 201810436228 A CN201810436228 A CN 201810436228A CN 108648307 A CN108648307 A CN 108648307A
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/30—Individual registration on entry or exit not involving the use of a pass
- G07C9/32—Individual registration on entry or exit not involving the use of a pass in combination with an identity check
- G07C9/37—Individual registration on entry or exit not involving the use of a pass in combination with an identity check using biometric data, e.g. fingerprints, iris scans or voice recognition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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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
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/193—Preprocessing; Feature extraction
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Abstract
The invention belongs to gate inhibition's technical fields, disclose a kind of access control system of applying electronic password, and the access control system of the applying electronic password includes:Solar powered module, infrared photography module, single chip control module, iris recognition module, deciphering module, infrared induction module, closedown module, display module.The present invention can obtain endlessly solar energy by solar powered module, ensure that access control system persistently works, energy saving, economic and environment-friendly;The iris feature information of user is obtained by iris recognition module simultaneously;The vault values being generated in advance are read, decruption key is calculated;Whether the decruption key being calculated described in judgement matches with the preset encryption key;If so, confirming that iris recognition success effectively prevent the leakage of iris feature information while protection is encrypted to terminal in realization;It is safe.
Description
Technical Field
The invention belongs to the technical field of access control, and particularly relates to an access control system applying an electronic password.
Background
The access control system is also called access management control system (ACCESS CONTROL SYSTEM). The access control system is an intelligent management system for managing personnel to enter and exit, and the summary is as follows: the system manages the time when people can enter and exit the doors, provides subsequent inquiry reports and the like, and common access control systems are generally called as a password access control system, a non-contact card access control system, a fingerprint iris palm type biological identification access control system, a face identification access control and attendance system and the like, and the access control system is developed rapidly in recent years and is widely applied to a management control system. However, the existing access control system consumes electric energy due to power supply in a traditional mode, and cannot continuously work if power failure occurs, so that the use of a user is influenced; meanwhile, user iris characteristic information in the existing access control system is easy to reveal, and the safety is low.
In summary, the problems of the prior art are as follows: the conventional access control system is powered by a traditional mode, consumes electric energy, and cannot continuously work if power failure occurs, so that the use of a user is influenced; meanwhile, user iris characteristic information in the existing access control system is easy to reveal, and the safety is low.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an access control system applying an electronic password.
The invention is realized in this way, an entrance guard system using electronic password includes:
the device comprises a solar power supply module, an infrared camera module, a singlechip control module, an iris identification module, a decryption module, an infrared induction module, a closing module and a display module;
the solar power supply module is connected with the singlechip control module and used for converting solar energy into electric energy through the solar cell panel to supply power to the access control system for a long time;
the infrared camera module is connected with the single-chip microcomputer control module and used for acquiring iris image data of the user through an infrared camera;
the infrared camera module calculates the smoothed spectral curve to CIEXYZ tristimulus values by combining a color matching function of a CIE1931 standard chromaticity system, calculates the CIEXYZ tristimulus values of each pixel to the lightness, the chroma and the hue of a uniform color perception space CIEL C h according to the white point of display equipment, and sets a lightness coefficient, a chroma coefficient and a hue coefficient according to color reproduction requirements; the method specifically comprises the following steps:
step one, calculating a radiance value from the gray value of each spectral band for each pixel of hyperspectral image data, and normalizing to form a spectral curve;
step two, smoothing the spectral curve obtained in the step one by adopting a Savitzky-Golay filter for each pixel, eliminating spectral noise on the basis of keeping more curve characteristics, and obtaining the smoothed spectral curve of each pixel
Step three, smoothing the spectrum curve of each pixel obtained in the step twoColor matching function in combination with CIE1931 standard chromaticity systemCalculating CIEXYZ tristimulus values (X, Y, Z) under a CIE1931 standard colorimetric system by adopting the following formula, wherein delta lambda is a spectrum sampling interval of an imaging spectrum instrument;
step four, tristimulus value (X) according to standard illuminant D65D65,YD65,ZD65) Converting the CIEXYZ tristimulus value of each pixel obtained in step three into a uniform color perception space CIEL by the following formula*C*h*Obtaining three color perception parameters, i.e. brightnessColour degreeAnd color tone h1;
Wherein,
XD65=95.047,YD65=100,ZD65=108.883;
step five, setting lightness coefficient kLChroma coefficient kCAnd a hue coefficient khThe brightness of each pixel obtained by the fourth modulation stepColour degreeAnd color tone h1Obtaining a modulated color perception parameter, i.e. brightnessColour degreeAnd color tone h2So that the visualization effect meets the fidelity reproduction requirement, kL=kC=1,khChange k to 0LRealizing the requirement of adjusting the brightness of the image and changing kCThe requirement of adjusting the brightness of the image is realized, and k is changedhThe requirement of adjusting the white balance of the image is realized;
the singlechip control module is connected with the solar power supply module, the infrared camera module, the iris identification module, the decryption module, the infrared induction module, the closing module and the display module and is used for scheduling each module to normally work;
the iris recognition module is connected with the single-chip microcomputer control module and used for recognizing the iris image acquired by the infrared camera module through the iris recognition chip;
the iris identification module compares the image transmission method with two adjacent frames of images to find out the changed areas of all the images, and then obtains a set of non-overlapping rectangular areas with the minimum area according to the coordinates of the changed pixel points; only sending image data and corresponding coordinate information contained in the rectangular area set each time;
obtaining a change rectangular area according to the coordinates of the pixel points, wherein the formulas (1) and (2) are formulas for judging the range of the rectangle R according to the change pixel points;
Rl≤Px AND Rt=Pyi (1)
Rr≥Px AND Rb≥Py (2)
wherein Rl and Rt represent the abscissa and ordinate of the upper left corner of the rectangle, Rr and Rb represent the abscissa and ordinate of the lower right corner of the rectangle, Px and Py represent the abscissa and ordinate of the pixel point to be changed, Py0 represents the ordinate of the pixel point to be changed for the first time; obtaining the range of the variable rectangular area according to the formula (1) and the formula (2); firstly, storing data of two adjacent bitmaps in front and back, and judging whether the values of pixels corresponding to the two screens in front and back are changed or not; when a changed sampling point is detected for the first time, recording the coordinates (PX0, PY0) of the changed sampling point as the coordinates (Rl, Rt) of the upper left corner of the changed rectangular area, and identifying the row no change as false; continuing to compare, when different sampling points are detected again, firstly marking the row as false without change, then comparing the abscissa Px of the sampling point with the abscissa Rl of the upper left corner of the rectangle and taking the minimum value, and simultaneously comparing the coordinates (Rr, Rb) of the lower right corner of the rectangle with the coordinates (Px, Py) of the point and taking the maximum value; namely:
Rl=min(Pxi,Rl)(i>1) Rt=Pyi(i=1)
Rr=max(Rxi,Rr)(i>1) Rb=max(Ryi,Rb)(i>1)
when detecting that the sampling point values of a certain row are all the same, obtaining a changed rectangular area block;
performing a rectangular segmentation algorithm on the changed area in a scanning area, and judging whether pixels corresponding to two frames of screen images in front and rear image buffer areas change by adopting an alternate direct comparison method so as to find out the changed rectangular area; according to the principle of from top to bottom and from left to right, based on an image transmission method of rectangular segmentation and column-spaced scanning, all change regions of a next frame image relative to a previous frame image are found out, and a set of non-overlapping rectangular regions with the smallest area is obtained based on a rectangular segmentation algorithm;
the decryption module is connected with the singlechip control module and is used for decrypting the access control password if the iris recognition module successfully recognizes;
the infrared induction module is connected with the single chip microcomputer control module and used for inducing whether a person passes through the infrared inductor;
the closing module is connected with the single-chip microcomputer control module and used for automatically closing the door when the infrared sensing module senses that a person passes through the closing module;
and the display module is connected with the single-chip microcomputer control module and is used for displaying the acquired image information.
Further, the iris identification module identification method is as follows:
firstly, acquiring iris characteristic information of a user;
secondly, reading a pre-generated vault value, wherein the vault value is obtained by calculation according to iris characteristic information of an authorized user and a preset encryption key in advance;
then, calculating a decryption key according to the iris characteristic information of the user and the vault value;
finally, judging whether the calculated decryption key is matched with the preset encryption key or not; if yes, the iris recognition is confirmed to be successful.
Further, the determining whether the calculated decryption key matches the preset encryption key includes:
acquiring equipment identification information of a terminal;
substituting the equipment identification information and the decryption key into a pre-constructed encryption hash function to calculate a decryption hash value;
and judging whether the decrypted hash value is matched with an encrypted hash value, wherein the encrypted hash value is obtained by substituting the equipment identification information and the encryption key into the encrypted hash function.
Further, the calculating a decryption key according to the iris feature information of the user and the vault value includes:
constructing a decryption polynomial function according to the iris feature information of the user and the vault value;
and determining the decryption key according to the decryption polynomial function.
The invention has the advantages and positive effects that: according to the invention, the solar power supply module can obtain continuous solar energy, so that the door control system can work for a long time, the energy is saved, and the door control system is economic and environment-friendly; meanwhile, iris feature information of the user is acquired through an iris recognition module; reading a pre-generated vault value, wherein the vault value is obtained by calculation according to iris characteristic information of an authorized user and a preset encryption key in advance; calculating a decryption key according to the iris feature information of the user and the vault value; judging whether the calculated decryption key is matched with the preset encryption key or not; if so, successfully identifying the iris, and effectively preventing the leakage of the iris characteristic information while realizing encryption protection on the terminal; the safety is high.
Drawings
Fig. 1 is a block diagram of an access control system applying an electronic password according to an embodiment of the present invention.
In the figure: 1. a solar power supply module; 2. an infrared camera module; 3. a single chip microcomputer control module; 4. an iris recognition module; 5. a decryption module; 6. an infrared sensing module; 7. closing the module; 8. and a display module.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the access control system using electronic password provided by the present invention includes: the device comprises a solar power supply module 1, an infrared camera module 2, a singlechip control module 3, an iris identification module 4, a decryption module 5, an infrared induction module 6, a closing module 7 and a display module 8.
The solar power supply module 1 is connected with the singlechip control module 3 and used for converting solar energy into electric energy through a solar panel to supply power to the access control system for a long time;
the infrared camera module 2 is connected with the singlechip control module 3 and is used for acquiring iris image data of a user through an infrared camera;
the singlechip control module 3 is connected with the solar power supply module 1, the infrared camera module 2, the iris recognition module 4, the decryption module 5, the infrared induction module 6, the closing module 7 and the display module 8 and is used for scheduling each module to normally work;
the iris recognition module 4 is connected with the singlechip control module 3 and is used for recognizing the iris image acquired by the infrared camera module 2 through an iris recognition chip;
the decryption module 5 is connected with the singlechip control module 3 and is used for decrypting the access control password if the iris recognition module succeeds in recognition;
the infrared induction module 6 is connected with the singlechip control module 3 and used for inducing whether a person passes through the infrared inductor;
the closing module 7 is connected with the single chip microcomputer control module 3 and used for automatically closing the door when the infrared sensing module 6 senses that a person passes through the door;
and the display module 8 is connected with the single-chip microcomputer control module 3 and is used for displaying the acquired image information.
The infrared camera module calculates the smoothed spectral curve to CIEXYZ tristimulus values by combining a color matching function of a CIE1931 standard chromaticity system, calculates the CIEXYZ tristimulus values of each pixel to the lightness, the chroma and the hue of a uniform color perception space CIEL C h according to the white point of display equipment, and sets a lightness coefficient, a chroma coefficient and a hue coefficient according to color reproduction requirements; the method specifically comprises the following steps:
step one, calculating a radiance value from the gray value of each spectral band for each pixel of hyperspectral image data, and normalizing to form a spectral curve;
step two, smoothing the spectral curve obtained in the step one by adopting a Savitzky-Golay filter for each pixel, eliminating spectral noise on the basis of keeping more curve characteristics, and obtaining the smoothed spectral curve of each pixel
Step three, smoothing the spectrum curve of each pixel obtained in the step twoColor matching function in combination with CIE1931 standard chromaticity systemCalculating CIEXYZ tristimulus values (X, Y, Z) under a CIE1931 standard colorimetric system by adopting the following formula, wherein delta lambda is a spectrum sampling interval of an imaging spectrum instrument;
step four, tristimulus value (X) according to standard illuminant D65D65,YD65,ZD65) Converting the CIEXYZ tristimulus value of each pixel obtained in step three into a uniform color perception space CIEL by the following formula*C*h*Obtaining three color perception parameters, i.e. brightnessColour degreeAnd color tone h1;
Wherein,
XD65=95.047,YD65=100,ZD65=108.883;
step five, setting lightness coefficient kLChroma coefficient kCAnd a hue coefficient khThe brightness of each pixel obtained by the fourth modulation stepColour degreeAnd color tone h1Obtaining a modulated color perception parameter, i.e. brightnessColour degreeAnd color tone h2So that the visualization effect meets the fidelity reproduction requirement, kL=kC=1,khChange k to 0LRealizing the requirement of adjusting the brightness of the image and changing kCThe requirement of adjusting the brightness of the image is realized, and k is changedhThe requirement of adjusting the white balance of the image is realized;
the iris identification module compares the image transmission method with two adjacent frames of images to find out the changed areas of all the images, and then obtains a set of non-overlapping rectangular areas with the minimum area according to the coordinates of the changed pixel points; only sending image data and corresponding coordinate information contained in the rectangular area set each time;
obtaining a change rectangular area according to the coordinates of the pixel points, wherein the formulas (1) and (2) are formulas for judging the range of the rectangle R according to the change pixel points;
Rl≤Px AND Rt=Pyi (1)
Rr≥Px AND Rb≥Py (2)
wherein Rl and Rt represent the abscissa and ordinate of the upper left corner of the rectangle, Rr and Rb represent the abscissa and ordinate of the lower right corner of the rectangle, Px and Py represent the abscissa and ordinate of the pixel point to be changed, Py0 represents the ordinate of the pixel point to be changed for the first time; obtaining the range of the variable rectangular area according to the formula (1) and the formula (2); firstly, storing data of two adjacent bitmaps in front and back, and judging whether the values of pixels corresponding to the two screens in front and back are changed or not; when a changed sampling point is detected for the first time, recording the coordinates (PX0, PY0) of the changed sampling point as the coordinates (Rl, Rt) of the upper left corner of the changed rectangular area, and identifying the row no change as false; continuing to compare, when different sampling points are detected again, firstly marking the row as false without change, then comparing the abscissa Px of the sampling point with the abscissa Rl of the upper left corner of the rectangle and taking the minimum value, and simultaneously comparing the coordinates (Rr, Rb) of the lower right corner of the rectangle with the coordinates (Px, Py) of the point and taking the maximum value; namely:
Rl=min(Pxi,Rl)(i>1) Rt=Pyi(i=1)
Rr=max(Rxi,Rr)(i>1) Rb=max(Ryi,Rb) (i>1)
when detecting that the sampling point values of a certain row are all the same, obtaining a changed rectangular area block;
performing a rectangular segmentation algorithm on the changed area in a scanning area, and judging whether pixels corresponding to two frames of screen images in front and rear image buffer areas change by adopting an alternate direct comparison method so as to find out the changed rectangular area; according to the principle of from top to bottom and from left to right, an image transmission method based on rectangular segmentation and alternate scanning finds out all the change regions of the next frame image relative to the previous frame image and obtains a set of non-overlapping rectangular regions with the minimum area based on a rectangular segmentation algorithm.
The iris identification module 4 provided by the invention has the following identification method:
firstly, acquiring iris characteristic information of a user;
secondly, reading a pre-generated vault value, wherein the vault value is obtained by calculation according to iris characteristic information of an authorized user and a preset encryption key in advance;
then, calculating a decryption key according to the iris characteristic information of the user and the vault value;
finally, judging whether the calculated decryption key is matched with the preset encryption key or not; if yes, the iris recognition is confirmed to be successful.
The judging whether the calculated decryption key is matched with the preset encryption key comprises the following steps:
acquiring equipment identification information of a terminal;
substituting the equipment identification information and the decryption key into a pre-constructed encryption hash function to calculate a decryption hash value;
and judging whether the decrypted hash value is matched with an encrypted hash value, wherein the encrypted hash value is obtained by substituting the equipment identification information and the encryption key into the encrypted hash function.
The calculating the decryption key according to the iris feature information of the user and the vault value comprises the following steps:
constructing a decryption polynomial function according to the iris feature information of the user and the vault value;
and determining the decryption key according to the decryption polynomial function.
When the solar door lock works, solar energy is converted into electric energy through the solar power supply module 1 to supply power to the door lock system for a long time; the data of the iris image of the user is collected through the infrared camera module 2; the singlechip control module 3 dispatches the iris recognition module 4 to recognize the iris image collected by the infrared camera module 2; the access control password is decrypted through the decryption module 5; whether a person passes through the infrared sensing module 6 is sensed; if the infrared sensing module 6 senses that a person passes through the door, the door is automatically closed through the closing module 7; the acquired image information is displayed by the display module 8.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (4)
1. The utility model provides an access control system of applied electronic password which characterized in that, access control system of applied electronic password includes:
the device comprises a solar power supply module, an infrared camera module, a singlechip control module, an iris identification module, a decryption module, an infrared induction module, a closing module and a display module;
the solar power supply module is connected with the singlechip control module and used for converting solar energy into electric energy through the solar cell panel to supply power to the access control system for a long time;
the infrared camera module is connected with the single-chip microcomputer control module and used for acquiring iris image data of the user through an infrared camera;
the infrared camera module calculates the smoothed spectral curve to CIEXYZ tristimulus values by combining a color matching function of a CIE1931 standard chromaticity system, calculates the CIEXYZ tristimulus values of each pixel to the lightness, the chroma and the hue of a uniform color perception space CIEL C h according to the white point of display equipment, and sets a lightness coefficient, a chroma coefficient and a hue coefficient according to color reproduction requirements; the method specifically comprises the following steps:
step one, calculating a radiance value from the gray value of each spectral band for each pixel of hyperspectral image data, and normalizing to form a spectral curve;
step two, smoothing the spectral curve obtained in the step one by adopting a Savitzky-Golay filter for each pixel, eliminating spectral noise on the basis of keeping more curve characteristics, and obtaining the smoothed spectral curve of each pixel
Step three, smoothing the spectrum curve of each pixel obtained in the step twoColor matching function in combination with CIE1931 standard chromaticity systemCalculating CIEXYZ tristimulus values (X, Y, Z) under a CIE1931 standard colorimetric system by adopting the following formula, wherein delta lambda is a spectrum sampling interval of an imaging spectrum instrument;
step four, tri-stimulation according to standard illuminant D65Value (X)D65,YD65,ZD65) Converting the CIEXYZ tristimulus value of each pixel obtained in step three into a uniform color perception space CIEL by the following formula*C*h*Obtaining three color perception parameters, i.e. brightnessColour degreeAnd color tone h1;
Wherein,
XD65=95.047,YD65=100,ZD65=108.883;
step five, setting lightness coefficient kLChroma coefficient kCAnd a hue coefficient khThe brightness of each pixel obtained by the fourth modulation stepColour degreeAnd color tone h1Obtaining a modulated color perception parameter, i.e. brightnessColour degreeAnd color tone h2So that the visualization effect meets the fidelity reproduction requirement, kL=kC=1,khChange k to 0LRealizing the requirement of adjusting the brightness of the image and changing kCThe requirement of adjusting the brightness of the image is realized, and k is changedhThe requirement of adjusting the white balance of the image is realized;
the singlechip control module is connected with the solar power supply module, the infrared camera module, the iris identification module, the decryption module, the infrared induction module, the closing module and the display module and is used for scheduling each module to normally work;
the iris recognition module is connected with the single-chip microcomputer control module and used for recognizing the iris image acquired by the infrared camera module through the iris recognition chip;
the iris identification module compares the image transmission method with two adjacent frames of images to find out the changed areas of all the images, and then obtains a set of non-overlapping rectangular areas with the minimum area according to the coordinates of the changed pixel points; only sending image data and corresponding coordinate information contained in the rectangular area set each time;
obtaining a change rectangular area according to the coordinates of the pixel points, wherein the formulas (1) and (2) are formulas for judging the range of the rectangle R according to the change pixel points;
Rl≤Px AND Rt=Pyi (1)
Rr≥Px AND Rb≥Py (2)
wherein Rl and Rt represent the abscissa and ordinate of the upper left corner of the rectangle, Rr and Rb represent the abscissa and ordinate of the lower right corner of the rectangle, Px and Py represent the abscissa and ordinate of the pixel point to be changed, Py0 represents the ordinate of the pixel point to be changed for the first time; obtaining the range of the variable rectangular area according to the formula (1) and the formula (2); firstly, storing data of two adjacent bitmaps in front and back, and judging whether the values of pixels corresponding to the two screens in front and back are changed or not; when a changed sampling point is detected for the first time, recording the coordinates (PX0, PY0) of the changed sampling point as the coordinates (Rl, Rt) of the upper left corner of the changed rectangular area, and identifying the row no change as false; continuing to compare, when different sampling points are detected again, firstly marking the row as false without change, then comparing the abscissa Px of the sampling point with the abscissa Rl of the upper left corner of the rectangle and taking the minimum value, and simultaneously comparing the coordinates (Rr, Rb) of the lower right corner of the rectangle with the coordinates (Px, Py) of the point and taking the maximum value; namely:
Rl=min(Pxi,Rl)(i>1) Rt=Pyi(i=1)
Rr=max(Rxi,Rr)(i>1) Rb=max(Ryi,Rb) (i>1)
when detecting that the sampling point values of a certain row are all the same, obtaining a changed rectangular area block;
performing a rectangular segmentation algorithm on the changed area in a scanning area, and judging whether pixels corresponding to two frames of screen images in front and rear image buffer areas change by adopting an alternate direct comparison method so as to find out the changed rectangular area; according to the principle of from top to bottom and from left to right, based on an image transmission method of rectangular segmentation and column-spaced scanning, all change regions of a next frame image relative to a previous frame image are found out, and a set of non-overlapping rectangular regions with the smallest area is obtained based on a rectangular segmentation algorithm;
the decryption module is connected with the singlechip control module and is used for decrypting the access control password if the iris recognition module successfully recognizes;
the infrared induction module is connected with the single chip microcomputer control module and used for inducing whether a person passes through the infrared inductor;
the closing module is connected with the single-chip microcomputer control module and used for automatically closing the door when the infrared sensing module senses that a person passes through the closing module;
and the display module is connected with the single-chip microcomputer control module and is used for displaying the acquired image information.
2. The access control system using electronic password of claim 1, wherein the iris recognition module recognition method is as follows:
firstly, acquiring iris characteristic information of a user;
secondly, reading a pre-generated vault value, wherein the vault value is obtained by calculation according to iris characteristic information of an authorized user and a preset encryption key in advance;
then, calculating a decryption key according to the iris characteristic information of the user and the vault value;
finally, judging whether the calculated decryption key is matched with the preset encryption key or not; if yes, the iris recognition is confirmed to be successful.
3. The door access system using electronic password of claim 2, wherein the determining whether the calculated decryption key matches the preset encryption key comprises:
acquiring equipment identification information of a terminal;
substituting the equipment identification information and the decryption key into a pre-constructed encryption hash function to calculate a decryption hash value;
and judging whether the decrypted hash value is matched with an encrypted hash value, wherein the encrypted hash value is obtained by substituting the equipment identification information and the encryption key into the encrypted hash function.
4. The door access system using electronic password of claim 2, wherein the calculating of the decryption key according to the iris feature information of the user and the value of the vault comprises:
constructing a decryption polynomial function according to the iris feature information of the user and the vault value;
and determining the decryption key according to the decryption polynomial function.
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