Selective Foot Size Measurement Using Image Processing

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Solution Overview

Problem

Existing foot size measurement technologies require complete image shooting and measurement before providing results, making it inconvenient to recognize and correct errors, leading to inefficient measurements.

Innovation Solution

A foot size measurement device and method that allows selective measurement and re-measurement of multiple elements like foot width and length using image processing, enabling immediate display and regeneration of foot size information, improving measurement efficiency by allowing partial measurement and re-measurement without requiring all elements to be remeasured.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If complete image shooting and measurement is required before providing results, then measurement precision can be ensured, but measurement efficiency deteriorates and user convenience is reduced

Engineering Contradiction:

Improvefoot size measurement accuracyVSAvoidmeasurement efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent divides the foot size measurement into multiple independent measurement elements (foot length, foot width, ball girth, heel width, foot height, heel inclination angle, hallux abduction angle, arch height). Each element can be measured separately through selective image shooting, allowing the system to provide partial measurement results without requiring complete measurement of all elements, thus improving measurement efficiency while maintaining precision for each individual element.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent enables partial measurement by allowing users to select and measure only the necessary measurement elements rather than requiring complete measurement of all elements. The system can provide foot size information based on one or more measured elements, eliminating the need for full re-measurement when errors occur, thereby improving productivity while ensuring sufficient measurement accuracy for practical purposes.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If all image shooting must be completed before providing measurement results, then measurement reliability is improved, but ease of operation deteriorates due to inability to recognize and correct errors

Engineering Contradiction:

Improvemeasurement reliabilityVSAvoiderror recognition and correction convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements immediate feedback by displaying measurement results for each measurement element as soon as the corresponding image is captured and processed. Users can immediately recognize measurement errors or unsatisfactory results and correct them without waiting for complete measurement to finish, significantly improving ease of operation while maintaining measurement reliability through continuous validation.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent allows preliminary measurement of individual elements before completing all measurements. Users can perform image shooting and measurement for specific elements, review the results immediately, and correct errors in those elements without requiring all other measurements to be completed first, thereby improving operational convenience while ensuring reliable results for each element.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If selective measurement of multiple elements is allowed, then ease of operation is improved, but device complexity increases

Engineering Contradiction:

Improveselective measurement capabilityVSAvoidmeasurement system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent employs a unified measurement system that can handle multiple measurement elements (foot length, foot width, ball girth, heel width, foot height, heel inclination angle, hallux abduction angle, arch height) using the same image processing framework. The system uses a common reference object and consistent measurement methodology for all elements, reducing the actual complexity increase while providing comprehensive selective measurement capabilities.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Enhances measurement efficiency by allowing users to select and re-measure specific elements, reducing the need for full re-measurement and improving convenience by providing immediate feedback and correction of errors.

Implementation Method 1

the measurement based on the one-foot image may be processing for obtaining the length or size of each measurement element by comparison with a predetermined reference object through image processing

Methodology Applied

Scientific EffectImage processing: Image Processing

Data Source

PatentUS20220395194A1Device and method for foot size measurement

Publication Date: 2022.12.15 ASICS CORP

AI summary

In a foot size measurement system, a measurement unit selectively measures one or more of multiple measurement elements to be measured as feature values defining one foot size, based on a one-foot image of a measured person. An information generator generates foot size information based on one or more measurement elements selectively measured by the measurement unit, among the multiple measurement elements. An output unit outputs the foot size information. The measurement unit selectively measures one or more of multiple measurement elements including a foot width and a foot length of one foot of a measured person.