Motion Detection System Using Infrared Outline Segmentation
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Solution Overview
Problem
Existing motion detection systems are not privacy-conscious and do not effectively distinguish states such as collapsing or raising a hand in non-security contexts like hospitals or care facilities, as they require detailed body shape visualization.
Innovation Solution
A motion detection system using an infrared light source to emit spatially-dispersed infrared rays, a camera to capture the subject's outline with these rays, and a controller to compare the outline with stored data to determine the subject's state, outputting relevant information without showing detailed body shapes, utilizing an output device like a mobile terminal to provide information associated with the detected state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera captures detailed body shape for motion detection, then the detection accuracy is improved, but privacy protection deteriorates
Solution Approach 1:
The patent segments the captured image data by extracting only the outline contour of the subject rather than capturing the entire detailed image. This segmentation approach retains the essential motion information needed for detection while eliminating unnecessary personal details, thus resolving the contradiction between detection accuracy and privacy protection.
Solution Approach 2:
The patent extracts only the necessary outline data from the captured image by using edge detection algorithms to identify contour lines. This extraction process removes detailed body shape information that would compromise privacy while preserving the outline information required for accurate motion state detection.
2Object-affected harmful factors
If outline data is used instead of detailed images, then privacy protection is improved, but the ability to distinguish object characteristics deteriorates
Solution Approach 1:
The patent applies local quality by focusing detection analysis on specific outline features such as head position, limb angles, and body posture contours rather than attempting to analyze entire detailed images. This localized approach to outline analysis preserves the ability to distinguish different motion states while maintaining privacy protection.
Solution Approach 2:
The patent uses asymmetric analysis of outline data by detecting specific angular relationships and positional configurations of body parts within the outline. This asymmetric feature extraction enables distinction between different motion states (such as collapsing versus raising hand) using only outline information without requiring symmetric detailed image data.
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 privacy-conscious detection of subject states by rendering subjects with multiple dots and comparing outlines to determine states like collapsing or raising a hand, allowing for appropriate responses without revealing personal details.
Implementation Method 1
an infrared light source that emits a plurality of infrared rays in a spatially-dispersed manner
Implementation Method 2
a camera that captures the subject using, among the plurality of infrared rays emitted by the infrared light source, infrared rays reflected by the subject
Data Source
AI summary
A motion detection system including: an infrared light source that emits infrared rays; a camera that captures a subject using infrared rays reflected by the subject; a memory that stores a plurality of pieces of outline data an output device that outputs information associated with a state of the subject; and a controller that controls the infrared light source, the camera, the memory, and the output device, wherein the controller performs the following: makes a comparison between an outline of the subject captured by the camera and the pieces of outline data; selects, from among the pieces of outline data, a piece of outline data which resembles the outline of the subject captured by the camera; and causes the output device to output information associated with a state of the subject corresponding to the selected piece of outline data.