Iris Recognition Shield Cover Red-Eye Illumination
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Solution Overview
Problem
Iris recognition systems face challenges in accurately determining genuine iris information due to light reflection issues from cover members, leading to noise and blurring of images, which complicates the observation of the red-eye phenomenon used to detect forged iris images.
Innovation Solution
The iris recognition apparatus incorporates a shield cover with a module mounting hole, a red-eye phenomenon generator, and an imaging module, where the illumination part and camera module are positioned on the rear of the shield cover, and a light passage hole is designed to minimize light reflection from the cover plate, allowing clear imaging of the red-eye effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover member is installed on the front surface of the iris recognition apparatus to prevent foreign matters from entering the optical module, then the protection of the optical module is improved, but light reflection occurs causing noise and blurring in the eye image
Solution Approach 1:
A light shielding member is introduced as an intermediary component between the illumination source and the cover member. This mediator blocks the harmful reflected light from reaching the image sensor while allowing the cover member to remain in place for protection. The light shielding member specifically targets and intercepts the reflected light path, preventing it from causing noise and blurring in the captured eye image.
Solution Approach 2:
The harmful light reflection is extracted and isolated from the main optical path by positioning the light shielding member strategically. The shielding member removes the reflected light component from reaching the image sensor, effectively separating the protective function of the cover member from the harmful optical interference it causes.
2Measurement precision
If illumination is installed close to the camera sensor to generate the red-eye phenomenon for detecting forged iris images, then the detection capability is improved, but light reflection from the cover member causes severe noise in the eye image
Solution Approach 1:
The light shielding member serves as a mediator that allows the illumination source to be positioned close to the camera sensor for effective red-eye phenomenon generation, while simultaneously blocking the harmful reflected light from the cover member. This enables the detection function to operate at optimal illumination conditions without suffering from the negative optical interference.
3Measurement precision
If light is irradiated to generate the red-eye phenomenon in living people for authentication, then the ability to distinguish genuine from forged iris images is improved, but the cover member causes light reflection that blurs the eyeball image
Solution Approach 1:
The light shielding member acts as an intermediary that preserves the clarity of the eyeball image by blocking reflected light paths while allowing the red-eye phenomenon generation to proceed. This maintains the information quality needed for accurate authentication by preventing the cover member's reflection from degrading the image.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces light reflection and noise, enabling clearer imaging of the red-eye phenomenon, thereby enhancing the accuracy in distinguishing genuine from forged iris images.
Implementation Method 1
a red-eye phenomenon generator including at least one illumination part and a substrate on which the at least one illumination part is mounted
Implementation Method 2
the red-eye phenomenon refers to a phenomenon in which, when light is irradiated while the pupil of a person is open, light is reflected from the capillaries inside the pupil
Implementation Method 3
an imaging module including a camera module for iris recognition, and a substrate on which the camera module is mounted
Data Source
AI summary
An iris recognition apparatus includes a front cover in which a module mounting hole is formed, a cover plate configured to be coupled to a front surface of the front cover, and an iris recognition module configured to be fitted into the module mounting hole from the rear of the front cover. The iris recognition module includes a shield cover fitted into the module mounting hole, a red-eye phenomenon generator including at least one illumination part, a substrate on which the at least one illumination part is mounted and disposed on the rear of the shield cover, an imaging module including a camera module for iris recognition, a substrate on which the camera module is mounted and disposed on the rear of the red-eye phenomenon generator, and a light passage hole formed in the shield cover corresponding to the front of the at least one illumination part.