Bioassay system based on iris texture analysis

A technology of iris texture and biometrics, which is applied in the fields of human identification, diagnostic recording/measurement, and eye testing equipment, etc. It can solve the problems of lack of iris image and inability to complete iris texture image quality assessment, etc.

Active Publication Date: 2005-06-08
SUZHOU SIYUAN KEAN INFORMATION TECH
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Problems solved by technology

[0029] The purpose of the present invention is to overcome the lack of support of the iris image quality analysis mechanism in the prior art and the inability to complete the iris texture image quality evaluation, to pr...

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  • Bioassay system based on iris texture analysis
  • Bioassay system based on iris texture analysis
  • Bioassay system based on iris texture analysis

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Embodiment 1

[0117] Embodiment 1, the structure of the iris optical imaging device 200 used for iris collection in the present invention can be obtained from figure 2 As can be seen in the figure, it includes a housing, and the vertical incidence cold light mirror 101, optical imaging lens 102, and CCD camera 100 are arranged in sequence on the optical axis in the housing. A light source 107, a position controller 105 for adjusting the position of the lighting source, a diffusion filter 106 for closing the lighting source, a voice prompt unit 108 and a photoelectric prompt unit 109.

[0118] The visible light-near-infrared band illumination light source further includes: composed of a surface light-emitting diode chip array (LED chips) with an emission wavelength in the bandwidth range of 400-900nm and an energy driver capable of changing the radiance / intensity of the light source. In addition, the emission wavelengths of the visible-near-infrared band illumination sources are synthesized...

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Abstract

The invention is a biometric system based on iris texture analysis, which overcomes the defects in the prior art that lack the support of iris image quality analysis mechanism and cannot complete the evaluation of iris texture image quality. The invention acquires iris texture images, automatically locates iris, evaluates and analyzes the quality of iris texture images, automatically tracks and detects living iris, standardizes polar coordinate transformation of iris analysis area, demodulates and expresses iris texture features, and generates feature code IrisID by quantization coding. Encoding IrisID similarity measurement, similarity measurement judgment and other steps are realized. The invention realizes the basic characteristic requirements of an ideal system: automaticity, non-invasiveness, friendly man-machine operation interface and high-quality imaging image; no correlation between geometric affine transformation and nonlinear affine deformation; no dependence on external imaging conditions ; Random probability distribution coding; High-precision false acceptance rate and false rejection rate performance.

Description

【Technical field】 [0001] The invention relates to a biometric system based on iris texture analysis, in particular to an automatic non-invasive acquisition of high-quality iris images and an individual biometric system based on iris texture analysis, which belongs to biostatistics, pattern recognition and computer vision In the cross-field, the device used in the system belongs to the field of opto-mechanical-electrical integration and automatic control technology. 【Background technique】 [0002] Physiological and anatomical medical characteristics of the iris used for individual biometrics are: [0003] 1. The texture of the iris is rich in details; [0004] 2. The formation of iris texture tissue details is related to the environment of the embryonic development stage, which has great randomness, even for monozygotic differentiation; [0005] 3. The characteristics of iris texture tissue remained unchanged from 8 months to 2 years after birth; [0006] 4. It is currentl...

Claims

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Application Information

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IPC IPC(8): A61B3/10A61B5/1171G06K9/00
Inventor 倪蔚民约翰·张
Owner SUZHOU SIYUAN KEAN INFORMATION TECH
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