An iris image capture device based on dual image sensors
An image sensor and iris image technology, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems of limited popularity and application fields, unfavorable system promotion and application, and high price, and achieve wide application range and low device cost. Low, high precision effects
Active Publication Date: 2016-09-28
WUHAN HONGSHI TECH
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Problems solved by technology
However, the performance of the first iris recognition system is seriously affected by interference such as eyelids, eyelashes, illumination changes, or out-of-plane rotation; the price of the second iris recognition system is too high, which is not conducive to the popularization and application of the system
Constraints on the input image will inevitably lead to constraints on the user during image acquisition, thus limiting the popularity and application fields of this technology.
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Embodiment 1
[0023] An iris image capture device based on dual image sensors, comprising a housing 1, an objective lens 2, a collimating mirror 3, a beam splitter 4, a low-pass filter 5, a first focusing lens 6, a second focusing lens 6-1, and illumination Device 7, first image sensor 8, second image sensor 8-1, mirror 9, high-pass filter 10, connector 11 and image processor 12;
[0024] The housing 1 is a closed cavity, which is divided into a first cavity 1-1, a second cavity 1-2, a third cavity 1-3 and a fourth cavity 1-4 from left to right by a partition , wherein the first inner cavity 1-1, the third inner cavity 1-3 and the fourth inner cavity 1-4 are divided into upper and lower inner cavities by a partition respectively, and the upper inner cavity of the first inner cavity 1-1 A light exit hole is provided on the left side wall of the inner chamber, a light entrance hole is provided on the left side wall of the lower inner chamber, and a light passage hole is arranged on the right ...
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The invention relates to an iris image capture device based on a dual image sensor, comprising a housing, an objective lens, a collimator, a beam splitter, a low-pass filter, a first focusing lens, a second focusing lens, an illuminator, and a first image sensor , a second image sensor, a reflector, a high-pass filter, a connector and an image processor; an illuminator is arranged on the upper part of the first inner cavity in the housing, an objective lens and a collimating mirror are arranged on the lower part, and a second inner cavity is provided with A reflector and a beam splitter, a high-pass filter, a second focusing lens, a low-pass filter and a first focusing lens are respectively arranged in the upper and lower parts of the third inner cavity, and a second image sensor and a second image sensor are arranged in the fourth inner cavity The first image sensor, the output terminals of the first image sensor and the second image sensor enter the image processor through the connector. The invention uses two image sensors to collect the iris images of the same human eye in two spectra, and can acquire high-quality iris images by using common image sensors.
Description
technical field [0001] The invention relates to an iris image capturing device, in particular to an iris image capturing device based on dual image sensors. Background technique [0002] Biometrics is a technology that uses biological characteristics to identify an individual. The iris has gradually become one of the most effective biometric features because of its uniqueness, stability and security. Iris-based automatic identification and verification systems have grown in popularity over the past few years due to the advent of efficient, available and accurate iris recognition algorithms. The iris recognition process is roughly divided into 6 steps: collecting iris pictures; image mode conversion; positioning and segmentation of iris inner and outer boundaries; iris normalization; feature extraction of iris coding; feature matching. Among them, the third step, the positioning and segmentation of the inner and outer boundaries of the iris, is the most important step, beca...
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IPC IPC(8): G06K9/00G06K9/20
Inventor 高俊雄易开军
Owner WUHAN HONGSHI TECH