CN106248070A - A kind of navigator started based on iris identification - Google Patents

Abstract

A kind of navigator started based on iris identification of the present invention, including navigator and the iris identification device that is connected with the navigator signal of telecommunication, described iris identification device includes: (1) sampling module；(2) pretreatment module；(3) feature coding module, for the feature of iris image is extracted and encoded, it includes that LBP operator processes submodule, for the second time LBP operator for the first time and processes submodule, for the third time LBP operator process submodule and the 4th LBP operator process submodule；(4) codes match module.Invention increases the relatedness of central point and other neighborhood of surrounding, disclosure satisfy that the image texture of different scale and frequency, after repeatedly LBP operator processes submodule process, under not affecting the central point relatedness with surrounding neighbors, constantly reduce code length, saved memory space, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtain higher robustness.

Description

A kind of navigator started based on iris identification

Technical field

The present invention relates to navigator system design field, be specifically related to a kind of navigator started based on iris identification.

Background technology

In correlation technique, the navigator with identification verification function generally uses basic LBP (local binary patterns) operator Iris image feature is extracted and encoded, and LBP operator is a kind of to describe the method for textural characteristics in the range of gradation of image, right For illumination variation, there is the strongest robustness, thus be widely used in the texture feature extraction of image.

Basic LBP operator is commonly defined as: by central point n in 3 × 3 windows_c8 neighborhood n about₀,...n₇Group Becoming, defined in it, texture T is: T=(n₀-n_c,n₁-n_c,...,n₇-n_c), it is carried out binary conversion treatment, with n_cFor threshold value, neighbour 8 points in territory and n_cRelatively, if being labeled as 1 more than the value of central point, 0 otherwise it is labeled as.Texture T after binaryzation is: T= (sgn(n₀-n_c),sgn(n₁-n_c),...,sgn(n₇-n_c)), whereinThrough calculating, will obtain with n_cFor 8 binary numbers at center, then are weighted different pixels position suing for peace just obtaining the LBP value of central point, wherein LBP value Computing formula be:Pixel each in image is carried out LBP computing, just can obtain LBP texture description to image.

But, owing to basic LBP operator cover only 8 neighborhood territory pixels of central point so that it is with other neighborhood of surrounding Relatedness is the most comprehensive, it is impossible to meet the image texture of different scale and frequency.

Summary of the invention

For the problems referred to above, the present invention provides the one that a kind of recognition speed is fast, identification range is wide to open based on iris identification Dynamic navigator, solves the navigator using basic LBP operator that iris image feature is extracted and encoded in correlation technique The problem that system can not process the image texture of different scale and frequency.

The purpose of the present invention realizes by the following technical solutions:

A kind of navigator started based on iris identification, including navigator and the iris identification that is connected with the navigator signal of telecommunication Device, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, internal four of described navigator set casing Corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining, correcting iris image and gather the information of iris image, due to reality acquisition In approximately the same plane, understand slightly deviation between iris image and the iris image of standard acquisition, need the iris that reality is obtained Image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

(2) pretreatment module, for positioning the iris image obtained and normalized, it includes that light speckle is filled out Filling submodule, described smooth speckle is filled submodule and is used for being filled with each hot spot point detected in iris image, fills The gray value of four the envelope points up and down in the non-spot area that Shi Liyong is adjacent with light speckle calculates the ash of light speckle Angle value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith the K in 5 × 5 windows Pixel is compared to calculate LBP value, and described K pixel is with a n_cCentered by be distributed in a n_cPeriphery, if n_cCoordinate be (x_c,y_c), the computing formula of LBP value is:

Wherein, described K pixel is labeled as n₀～n_K, the span of K is [20,24], 1st-LBP (x_c,y_c) take Value scope is [0, K]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module also includes:

(1) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(2) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(3) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The invention have the benefit that

1, image rectification submodule is set, and defines updating formula, improve the precision of image procossing；

2, light speckle is set and fills submodule, and define the gray value computing formula of light speckle, remain rainbow well The structural information of film image, the iris image after filling can position effectively；

3, the first positioning unit arranged, its Canny edge detection operator passing through improvement and Hough loop truss are to iris Inside and outside circle positions, it is simple to the speed positioning and improve iris of iris；

4, the first time LBP operator arranged processes submodule, adds the relatedness of central point and other neighborhood of surrounding, energy Enough meet the image texture of different scale and frequency；

5, the second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP calculation Son processes submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduces code length, has saved storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtain higher robustness.

Accompanying drawing explanation

The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not constitute any limit to the present invention System, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain according to the following drawings Other accompanying drawing.

Fig. 1 is the iris identification device connection diagram of the present invention.

Fig. 2 is the navigator schematic diagram of the present invention.

Detailed description of the invention

The invention will be further described with the following Examples.

Embodiment 1

Seeing Fig. 1, Fig. 2, a kind of navigator started based on iris identification of the present embodiment, including navigator and and navigator The iris identification device that the signal of telecommunication connects, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, described navigator set casing internal four Individual corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining iris image and gathering the information of iris image；

(2) pretreatment module, for obtaining, correcting iris image and gather the information of iris image, owing to reality obtains Iris image and the iris image of standard acquisition between in approximately the same plane can slightly deviation, need the rainbow that reality is obtained Film image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith 20 in 5 × 5 windows Individual pixel is compared to calculate LBP value, and described 20 pixels are with a n_cCentered by be distributed in a n_cPeriphery, if n_cSeat It is designated as (x_c,y_c), the computing formula of LBP value is:

Wherein, described 20 pixels are labeled as n₀～n₂₀, 1st-LBP (x_c,y_c) span be [0,20]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module includes:

(1) light speckle fills submodule: for being filled with each hot spot point detected in iris image, during filling The gray value utilizing four the envelope points up and down in the non-spot area adjacent with light speckle calculates the gray scale of light speckle Value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

(2) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(3) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(4) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The present embodiment arranges light speckle and fills submodule, remains the structural information of iris image well, after filling Iris image can position effectively；Arrange first positioning unit, its by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, it is simple to the speed positioning and improve iris of iris；The first time arranged LBP operator processes submodule, adds the relatedness of central point and other neighborhood of surrounding, it is possible to meet different scale and frequency Image texture；The second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP operator Process submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduce code length, save storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtained higher robustness, use CASIA When V1.0 iris storehouse is tested, result is as follows:

Embodiment 2

Seeing Fig. 1, Fig. 2, a kind of navigator started based on iris identification of the present embodiment, including navigator and and navigator The iris identification device that the signal of telecommunication connects, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, internal four of described navigator set casing Corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining iris image and gathering the information of iris image；

(2) pretreatment module, for obtaining, correcting iris image and gather the information of iris image, owing to reality obtains Iris image and the iris image of standard acquisition between in approximately the same plane can slightly deviation, need the rainbow that reality is obtained Film image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith 21 in 5 × 5 windows Individual pixel is compared to calculate LBP value, and described 21 pixels are with a n_cCentered by be distributed in a n_cPeriphery, if n_cSeat It is designated as (x_c,y_c), the computing formula of LBP value is:

Wherein, described 21 pixels are labeled as n₀～n₂₁, 1st-LBP (x_c,y_c) span be [0,21]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module includes:

(1) light speckle fills submodule: for being filled with each hot spot point detected in iris image, during filling The gray value utilizing four the envelope points up and down in the non-spot area adjacent with light speckle calculates the gray scale of light speckle Value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

(2) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(3) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(4) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The present embodiment arranges light speckle and fills submodule, remains the structural information of iris image well, after filling Iris image can position effectively；Arrange first positioning unit, its by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, it is simple to the speed positioning and improve iris of iris；The first time arranged LBP operator processes submodule, adds the relatedness of central point and other neighborhood of surrounding, it is possible to meet different scale and frequency Image texture；The second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP operator Process submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduce code length, save storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtained higher robustness, use CASIA When V1.0 iris storehouse is tested, result is as follows:

Embodiment 3

Seeing Fig. 1, Fig. 2, a kind of navigator started based on iris identification of the present embodiment, including navigator and and navigator The iris identification device that the signal of telecommunication connects, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, internal four of described navigator set casing Corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining, correcting iris image and gather the information of iris image, due to reality acquisition In approximately the same plane, understand slightly deviation between iris image and the iris image of standard acquisition, need the iris that reality is obtained Image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

(2) pretreatment module, for positioning and normalized the iris image obtained；

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith 22 in 5 × 5 windows Individual pixel is compared to calculate LBP value, and described 22 pixels are with a n_cCentered by be distributed in a n_cPeriphery, if n_cSeat It is designated as (x_c,y_c), the computing formula of LBP value is:

Wherein, described 22 pixels are labeled as n₀～n₂₁, 1st-LBP (x_c,y_c) span be [0,22]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module includes:

(1) light speckle fills submodule: for being filled with each hot spot point detected in iris image, during filling The gray value utilizing four the envelope points up and down in the non-spot area adjacent with light speckle calculates the gray scale of light speckle Value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

(2) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(3) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(4) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The present embodiment arranges light speckle and fills submodule, remains the structural information of iris image well, after filling Iris image can position effectively；Arrange first positioning unit, its by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, it is simple to the speed positioning and improve iris of iris；First arranged Secondary LBP operator processes submodule, adds the relatedness of central point and other neighborhood of surrounding, it is possible to meet different scale and frequency Image texture；The second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP calculation Son processes submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduces code length, has saved storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtained higher robustness, use CASIA When V1.0 iris storehouse is tested, result is as follows:

Embodiment 4

Seeing Fig. 1, Fig. 2, a kind of navigator started based on iris identification of the present embodiment, including navigator and and navigator The iris identification device that the signal of telecommunication connects, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, internal four of described navigator set casing Corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining, correcting iris image and gather the information of iris image, due to reality acquisition In approximately the same plane, understand slightly deviation between iris image and the iris image of standard acquisition, need the iris that reality is obtained Image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

(2) pretreatment module, for positioning and normalized the iris image obtained；

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith 23 in 5 × 5 windows Individual pixel is compared to calculate LBP value, and described 23 pixels are with a n_cCentered by be distributed in a n_cPeriphery, if n_cSeat It is designated as (x_c,y_c), the computing formula of LBP value is:

Wherein, described 23 pixels are labeled as n₀～n₂₁, 1st-LBP (x_c,y_c) span be [0,23]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module includes:

(1) light speckle fills submodule: for being filled with each hot spot point detected in iris image, during filling The gray value utilizing four the envelope points up and down in the non-spot area adjacent with light speckle calculates the gray scale of light speckle Value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

(2) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(3) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(4) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The present embodiment arranges light speckle and fills submodule, remains the structural information of iris image well, after filling Iris image can position effectively；Arrange first positioning unit, its by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, it is simple to the speed positioning and improve iris of iris；The first time arranged LBP operator processes submodule, adds the relatedness of central point and other neighborhood of surrounding, it is possible to meet different scale and frequency Image texture；The second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP operator Process submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduce code length, save storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtained higher robustness, use CASIA When V1.0 iris storehouse is tested, result is as follows:

Embodiment 5

Seeing Fig. 1, Fig. 2, a kind of navigator started based on iris identification of the present embodiment, including navigator and and navigator The iris identification device that the signal of telecommunication connects, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing sets Buffer layer, described buffer layer is had to be filled between navigator set casing, navigator housing, internal four of described navigator set casing Corner is provided with grip block, is provided with the tensioning bullet being arranged in parallel between each grip block described and navigator set casing inwall Spring, the vertical section in described navigator set casing both sides is provided with several louvres, and described louvre is that low inside and high outside shape is arranged.

Preferably, it is characterized in that, described buffer layer is that elastic material is made.

Preferably, it is characterized in that, described tensioning spring two ends connect for fixing.

Preferably, it is characterized in that, described iris identification device includes:

(1) sampling module, for obtaining, correcting iris image and gather the information of iris image, due to reality acquisition In approximately the same plane, understand slightly deviation between iris image and the iris image of standard acquisition, need the iris that reality is obtained Image carries out plane correction, sets image rectification submodule, and the updating formula that described image rectification submodule uses is:

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual Standard deviation between the iris image and each pixel point value of the iris image of standard acquisition that obtain；

(2) pretreatment module, for positioning and normalized the iris image obtained；

Preferably, it is characterized in that, described iris identification device also includes:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith 24 in 5 × 5 windows Individual pixel is compared to calculate LBP value, and described 24 pixels are with a n_cCentered by be distributed in a n_cPeriphery, if n_cSeat It is designated as (x_c,y_c), the computing formula of LBP value is:

Wherein, described 24 pixels are labeled as n₀～n₂₁, 1st-LBP (x_c,y_c) span be [0,24]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith week Enclosing the relatedness of neighborhood, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, by the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCalculating, computing formula is:

C, for the third time LBP operator process submodule, process the square after submodule processes for shortening through second time LBP operator The feature coding length of shape image, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c| =rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large After take front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: on the basis of processing after submodule processes at third time LBP operator Continuing to reduce code length, computing formula is:

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and data base Feature coding is compared, and completes the identification to identity.

Wherein, described pretreatment module includes:

(1) light speckle fills submodule: for being filled with each hot spot point detected in iris image, during filling The gray value utilizing four the envelope points up and down in the non-spot area adjacent with light speckle calculates the gray scale of light speckle Value, a light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂, y₂)、P₃(x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

(2) coarse positioning submodule: fill submodule with light speckle and be connected, is used for carrying out iris image cutting and the most fixed Position pupil position, during cutting centered by described pupil position, the iris image after filling hot spot cut by the radius of 5 times Cut；

(3) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(4) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

Wherein, described fine positioning submodule includes the downsampling unit being sequentially connected with, first positioning unit and again positions Unit, described downsampling unit is for carrying out down-sampling to the iris image after cutting, and described first positioning unit is used for passing through Iris inside and outside circle is positioned by the Canny edge detection operator and the Hough loop truss that improve, and described positioning unit again is used for It is accurately positioned on iris image with the parameter that first positioning unit positions.

Wherein, the Canny edge detection operator of described improvement is the suppression that vertical direction only carries out non-maximum Canny edge detection operator.

Wherein, the Canny edge detection operator of described improvement is the Canny limit carrying out strong rim detection only with high threshold Edge detective operators.

The present embodiment arranges light speckle and fills submodule, remains the structural information of iris image well, after filling Iris image can position effectively；Arrange first positioning unit, its by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, it is simple to the speed positioning and improve iris of iris；The first time arranged LBP operator processes submodule, adds the relatedness of central point and other neighborhood of surrounding, it is possible to meet different scale and frequency Image texture；The second time LBP operator arranged processes submodule, for the third time LBP operator and processes submodule and the 4th LBP operator Process submodule, under not affecting the central point relatedness with surrounding neighbors, constantly reduce code length, save storage sky Between, decrease amount of calculation, improve recognition speed, enhance recognition accuracy, obtained higher robustness, use CASIA When V1.0 iris storehouse is tested, result is as follows:

Last it should be noted that, above example is only in order to illustrate technical scheme, rather than the present invention is protected Protecting the restriction of scope, although having made to explain to the present invention with reference to preferred embodiment, those of ordinary skill in the art should Work as understanding, technical scheme can be modified or equivalent, without deviating from the reality of technical solution of the present invention Matter and scope.

Claims (9)

1. the navigator started based on iris identification, including navigator and the iris identification that is connected with the navigator signal of telecommunication Device, described navigator includes:

Set casing, navigator housing, it is characterised in that: described navigator set casing surface upper and lower with navigator housing is provided with and subtracts Shake layer, described buffer layer is filled between navigator set casing, navigator housing, internal four turnings of described navigator set casing Place is provided with grip block, is provided with the tensioning spring being arranged in parallel, institute between each grip block described and navigator set casing inwall Stating the vertical section in navigator set casing both sides and be provided with several louvres, described louvre is that low inside and high outside shape is arranged.

A kind of navigator started based on iris identification the most according to claim 1, is characterized in that, described buffer layer is bullet Property material is made.

A kind of navigator started based on iris identification the most according to claim 2, is characterized in that, described tensioning spring two End connects for fixing.

A kind of navigator started based on iris identification the most according to claim 3, is characterized in that, described iris identification device Including:

(1) sampling module, for obtaining, correcting iris image and gather the information of iris image, the iris obtained due to reality In approximately the same plane, understand slightly deviation between image and the iris image of standard acquisition, need the iris image that reality is obtained Carrying out plane correction, set image rectification submodule, the updating formula that described image rectification submodule uses is:

$I{(x,y)}_A=(1-\frac{1}{n}\underset{b=1}{\overset{n}{\Σ}}{\mathrm{\σ}}_b)\·I{(x,y)}_B$

Wherein, and I (x, y)_AThe iris image that expression reality obtains, and I (x, y)_BRepresent the iris image of standard acquisition, actual acquisition Iris image and standard acquisition iris image each pixel point value between standard deviation；

(2) pretreatment module, for positioning the iris image obtained and normalized, it includes that light speckle fills son Module, described smooth speckle is filled submodule and is used for being filled with each hot spot point detected in iris image, sharp during filling The gray value of light speckle is calculated with the gray value of four the envelope points up and down in the non-spot area adjacent with light speckle, A light speckle in definition iris image is P₀(x₀,y₀), described four envelope points are followed successively by P₁(x₁,y₁)、P₂(x₂,y₂)、P₃ (x₃,y₃)、P₄(x₄,y₄), the gray value computing formula of definition light speckle is:

$I\left(P_0\right)=\sqrt{\left|\frac{\[(x_2-x_0)I\left(P_1\right)+(x_0-x_1)I\left(P_2\right)\]\×\[(y_4-y_0)I\left(P_3\right)+(y_0-y_3)I\left(P_4\right)\]}{\left(x_2-x_1\right)\left(y_4-y_3\right)}\right|}$

A kind of navigator started based on iris identification the most according to claim 4, is characterized in that, described iris identification device Also include:

(3) feature coding module, for the feature of iris image is extracted and is encoded, including:

A, for the first time LBP operator process submodule: for any point n in iris image_cWith K pixel in 5 × 5 windows Point is compared to calculate LBP value, and described K pixel is with a n_cCentered by be distributed in a n_cPeriphery, if n_cCoordinate be (x_c, y_c), the computing formula of LBP value is:

$1st-LBP(x_c,y_c)=\underset{i=0}{\overset{K}{\mathrm{\Σ}}}\mathrm{sgn}(n_i-n_c)2^i,$

Wherein, described K pixel is labeled as n₀～n_K, the span of K is [20,24], 1st-LBP (x_c,y_c) value model Enclose for [0, K]；

B, for the second time LBP operator process submodule, for strengthening described some n on the premise of ensureing code length_cWith surrounding neighbors Relatedness, it is with a n_c8 neighborhood territory pixel points as sub-center point, be denoted as n_vc0,n_vc1,...,n_vc7, use 3 × 3 windows, By the average of entire pixels in windowReplace the value of sub-center point, re-use LBP operator to central point n_cCarry out Calculating, computing formula is:

$2nd-LBP(x_c,y_c)=\underset{i=0}{\overset{7}{\mathrm{\Σ}}}\mathrm{sgn}(n_{vci}-n_c)2^i;$

C, for the third time LBP operator process submodule, process the iris figure after submodule processes for shortening through second time LBP operator The feature coding length of picture, it is with a n_cCentered by, according to self-defining function { n in the window of 3 × 3_vcj,|n_vcj-n_c|= rank₄(|n_vci-n_c|, i=0,1 ..., 7), j=0,1,2,3} selects 4 sub-center points to calculate, and computing formula is:

$3rd-LBP(x_c,y_c)=\underset{j=0}{\overset{3}{\mathrm{\Σ}}}\mathrm{sgn}(n_{vcj}-n_c)2^j$

Wherein, rank₄(|n_vci-n_c|, i=0,1 ..., 7) represent 7 | n_vci-n_c| value arrange from small to large after take Front 4 numbers, n_vcjRepresent 4 the sub-center points chosen；

D, the 4th LBP operator process submodule: continue on the basis of processing after submodule processes at third time LBP operator Reducing code length, computing formula is:

$4th-LBP\left(x_c,y_c\right)=\left\{\begin{array}{cc}1,& \underset{j=0}{\overset{3}{\mathrm{\&Sigma;}}}\mathrm{sgn}\left(n_{vcj}-n_c\right)2^j\&GreaterEqual;2\\ 0,& \underset{j=0}{\overset{3}{\mathrm{\&Sigma;}}}\mathrm{sgn}\left(n_{vcj}-n_c\right)2^j<2\end{array}\right.$

After having calculated, output represents the coding of iris image feature；

(4) codes match module, for receiving the coding of described expression iris image feature and by itself and the feature in data base Coding is compared, and completes the identification to identity.

A kind of navigator started based on iris identification the most according to claim 5, is characterized in that, described pretreatment module Also include:

(1) coarse positioning submodule: fill submodule with light speckle and be connected, for carrying out cutting Primary Location pupil to iris image Hole site, during cutting centered by described pupil position, the iris image after filling hot spot cuts by the radius of 5 times；

(2) fine positioning submodule: be connected with coarse positioning submodule, is used for being accurately positioned iris region；

(3) normalization submodule, for being launched into the iris image of fixed resolution by the iris region behind location.

A kind of navigator started based on iris identification the most according to claim 6, is characterized in that, described fine positioning submodule Block includes the downsampling unit being sequentially connected with, first positioning unit and positioning unit again, and described downsampling unit is for cutting Iris image after cutting carries out down-sampling, described first positioning unit for by improve Canny edge detection operator and Iris inside and outside circle is positioned by Hough loop truss, and described positioning unit again is for the parameter positioned with first positioning unit Iris image is accurately positioned.

A kind of navigator started based on iris identification the most according to claim 7, is characterized in that, described improvement Canny edge detection operator is the Canny edge detection operator of the suppression that vertical direction only carries out non-maximum.

A kind of navigator started based on iris identification the most according to claim 8, is characterized in that, described improvement Canny edge detection operator is the Canny edge detection operator carrying out strong rim detection only with high threshold.