Iris Scanning Apparatus Using Wide-Angle Camera for Eye Location
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Solution Overview
Problem
Traditional iris scanning apparatuses require users to alternate between observing the subject's face and an image display, making it inconvenient to locate the eye region and determine if it's within scanning range, leading to potential erroneous operations.
Innovation Solution
An iris scanning apparatus with a combination of a narrow angle image collector for focused eye images, a wide angle image collector for overall face images, and an image processor that displays distance information and eye presence, allowing automatic iris scanning without user input when the eye is within range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a narrow angle image collector is used to capture the eye region, then the image quality and detail of the eye can be improved, but the user must alternate between observing the subject's face and the image display to locate the eye region
Solution Approach 1:
The system divides the imaging function into two separate collectors: a wide angle image collector for capturing the overall face region and a narrow angle image collector for capturing the eye region. This segmentation allows each collector to optimize for its specific function while the display shows both images, enabling users to locate eyes easily without alternating observations.
Solution Approach 2:
The display screen serves as an intermediary that presents both the wide angle and narrow angle images simultaneously. This intermediary allows users to view the relationship between the overall face and eye region in a single glance, eliminating the need to alternate between observing the subject's face and the image display.
2Productivity
If automatic iris scanning is implemented without user input, then scanning efficiency is improved, but erroneous operations may occur when the captured image does not contain an eye region
Solution Approach 1:
The system performs preliminary image analysis using the wide angle image collector to determine whether an eye region is present in the captured image before initiating automatic iris scanning. This preliminary check prevents erroneous operations by ensuring the scanning process only activates when the image contains a valid eye region.
Solution Approach 2:
The system incorporates feedback from the image analysis process to control the scanning operation. The image processor analyzes the wide angle image to detect eye presence and uses this feedback information to determine whether to proceed with automatic iris scanning, thereby preventing erroneous operations while maintaining scanning efficiency.
3Ease of operation
If a wide angle camera is used to capture the overall face, then the user can easily locate the eye region by viewing only the image display, but the detail and clarity of the eye region may be reduced
Solution Approach 1:
The system segments the imaging task between two cameras with different fields of view: the wide angle camera captures the overall face region for easy eye location, while the narrow angle camera captures the eye region for high detail. Both images are displayed together, allowing users to benefit from both convenience and precision simultaneously.
Solution Approach 2:
The system merges the outputs of both the wide angle and narrow angle image collectors on a single display screen. This combination allows users to view both the overall face context and the detailed eye region in one display, eliminating the need to alternate between different views while maintaining both convenience and image quality.
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
Enables users to easily locate and scan the iris by viewing only the image display, preventing erroneous operations by automatically determining eye presence and range, thus enhancing convenience and security.
Implementation Method 1
a light source for radiating infrared light toward an eye of a subject
Data Source
AI summary
Embodiments provide an iris scanning apparatus for identifying a subject, employing a wide-angle image collector, and a method thereof. A wide angle camera is employed in the iris scanning apparatus to allow a user to easily locate a small eye region of a subject without having to check back and forth between an image display and the subject's face. The apparatus and method are also capable of measuring the distance to the subject's eye and displaying the distance information on the image display, and informing the user as to whether the eye of the subject is within operating range of the iris scanning apparatus. Also, iris scanning is automatically performed without the user's input when an eye is positioned within operating range, and is not performed if an image captured by the iris scanning apparatus does not contain an eye region, in order to prevent erroneous operation.