Geometrico-Morphological Parameter Measurement Using Natural Posture Imaging
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Solution Overview
Problem
Existing methods for determining geometrico-morphological parameters for vision correction equipment are not reliable in natural posture, require specific instruments, and cannot be self-administered, leading to unsatisfactory repeatability and accessibility issues.
Innovation Solution
A method involving a subject placing themselves in a natural posture with a visual target, using an image capture apparatus to capture images while adjusting its position to align with the subject's gaze direction, allowing for the determination of geometrico-morphological parameters using a portable electronic device, enabling self-measurement without the need for specialized instruments or professionals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If specific instruments and professional intervention are used to measure geometrico-morphological parameters, then measurement precision is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent uses a camera to capture images of the subject's head and eyes, creating a visual copy that can be analyzed to determine geometrico-morphological parameters. This replaces complex physical measuring instruments with a simple imaging device, maintaining measurement precision while reducing device complexity
Solution Approach 2:
The patent replaces manual mechanical measurement methods (such as using rulers or calipers) with an optical system using a camera and image processing algorithms. This substitution eliminates the need for specialized mechanical instruments and professional operators, simplifying the overall system
2Measurement precision
If manual measurement methods are used with professional intervention, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent enables subjects to perform self-measurement by capturing images of their own heads and eyes using a camera. The automated image processing and parameter calculation eliminate the need for professional operators, making the process easy for ordinary people to perform independently while maintaining measurement precision through algorithmic analysis
3Measurement precision
If the image capture apparatus is placed close to the subject's eyes, then measurement precision is improved, but the subject's natural posture is disturbed
Solution Approach 1:
The patent introduces a visual target as an intermediary element that the subject focuses on during image capture. This allows the camera to be positioned optimally for measurement precision while the subject maintains their natural posture by looking at the target rather than directly at the camera, ensuring both precision and reliability
Data Source
AI summary
Disclosed is a method wherein the following steps are performed: a) the subject is placed in a natural posture, in which at least one of the gaze directions of the subject points to a visual target, b) an image capture apparatus is placed between the head of the subject and the visual target, c) the relative posture of the image capture apparatus and head of the subject is adjusted in order for the pupil of the image capture apparatus to be positioned close to the gaze direction of at least one of the eyes of the subject, d) an image of the head of the subject is captured, and e) the at least one geometrico-morphological parameter is deduced from this image.