Posture Detection Using Trunk Axis Rotation Center
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Solution Overview
Problem
Conventional posture determination techniques struggle to accurately determine the posture of a person when only the upper body is leaning, limiting their application to scenarios like a customer leaning forward in a store or a store clerk bowing, as they rely on the inclination of the trunk axis calculated from the entire body.
Innovation Solution
An information processing apparatus that captures images of a subject at different times, detects feature points, calculates the movement locus, identifies the center of a circle representing the locus as an arc, and determines the posture based on the identified center position, allowing for accurate determination of posture even when only the upper body is leaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inclination of the trunk axis is calculated from the entire body image area, then the posture determination can be performed using simple image processing, but the accuracy deteriorates when only the upper body is leaning
Solution Approach 1:
The patent segments the body image area into multiple regions (head, upper body, lower body) and selectively processes only the upper body region for posture determination. This segmentation allows the system to maintain simplicity in processing while improving accuracy by focusing on the relevant body parts that exhibit posture changes, rather than processing the entire body image area.
2Adaptability or versatility
If the entire body image area is processed to determine posture, then the method can handle various posture types, but the accuracy deteriorates for upper-body-only leaning scenarios
Solution Approach 1:
The patent applies local quality by assigning different processing strategies to different body regions. The upper body region is processed with higher precision to detect subtle leaning movements, while other regions are processed differently or excluded from posture determination. This localized approach maintains versatility for various posture types while achieving high accuracy for upper-body-leaning scenarios.
Data Source
AI summary
An information processing apparatus includes a memory, and a processor coupled to the memory and configured to obtain a plurality of images of a subject captured at different timings, detect a feature point of the subject from each of the plurality of images, identify a movement locus of the feature point between the plurality of images, identify a center position of a circle having the movement locus as an arc, and determine a posture of the subject based on the identified center position.