Contactless Ring Size Estimation Using Iris Reference Measurement
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Solution Overview
Problem
Consumers lack a convenient method to determine ring size without the use of a ring-sizing tool or tape measure.
Innovation Solution
A system that captures images of a user's facial region and finger, measuring parameters such as iris diameter, pupillary distance, and finger region width to estimate ring size using predefined equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a ring-sizing tool or tape measure is used to determine ring size, then measurement accuracy is improved, but convenience and accessibility deteriorate because these tools are not always readily accessible
Solution Approach 1:
The patent uses the user's iris as an intermediary reference object to determine ring size. Instead of directly measuring the finger with a physical tool, the system captures an image of the user's face and finger, measures the iris diameter in the image, and uses this as a reference to calculate the ring size. This intermediary approach eliminates the need for physical measuring tools while maintaining measurement accuracy.
Solution Approach 2:
The patent replaces the mechanical measurement system (ring-sizing tools, tape measures) with an optical/image processing system. The system uses a camera to capture images, processes the images to measure iris diameter and finger dimensions, and calculates ring size through computational methods. This substitution eliminates the need for physical contact and portable measuring tools.
2Ease of operation
If contactless methods are used to estimate ring size, then ease of operation is improved, but measurement precision may deteriorate compared to direct physical measurement
Solution Approach 1:
The system incorporates feedback mechanisms by allowing users to input their actual iris diameter or pupillary distance, which serves as a reference to calibrate the measurements. The system also provides visual feedback by displaying the captured image with measured parameters, allowing users to verify the accuracy of the measurement before finalizing the ring size estimation.
Solution Approach 2:
The patent uses parameter changes by establishing mathematical relationships between measurable parameters (iris diameter, pupillary distance, finger width) and the target parameter (ring size). By changing the reference frame from direct finger measurement to facial feature measurement combined with mathematical equations, the system achieves accurate contactless estimation.
3Reliability
If physical measuring tools are required, then measurement reliability is improved, but device complexity increases due to the need for additional tools
Solution Approach 1:
The patent makes the computing device universal by using its existing camera and processing capabilities for multiple purposes - capturing facial images, measuring iris diameter, measuring pupillary distance, and calculating ring size. This eliminates the need for dedicated ring-sizing tools and integrates the function into a device users already possess and are familiar with.
Solution Approach 2:
The system enables self-service by allowing users to perform their own ring size measurement using their smartphone or computing device. The automated image capture, measurement, and calculation processes eliminate the need for professional assistance or specialized equipment, making the service accessible to anyone with a computing device.
Data Source
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AI summary
A computing device prompts a user to place the user's hand next to a facial region of the user and obtains an image depicting the facial region and a finger of the user. The computing device measures a diameter of an iris in the facial region and measures a width of finger region located between two knuckles on the finger depicted in the image. The computing device estimates a ring size of the finger based on an actual iris diameter, the measured iris diameter, and/or the measured finger region width. The computing device outputs the estimated ring size.