Radar-Based Gesture Recognition Through Obstructions
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Solution Overview
Problem
Current gesture recognition techniques struggle to accurately recognize in-the-air gestures made from varying distances and through obstructions, such as clothing and objects, limiting user interaction with devices like TVs and appliances.
Innovation Solution
Radar-based gesture recognition systems that emit a radar field capable of penetrating fabrics and reflecting off human tissue, allowing for three-dimensional gesture recognition and differentiation between multiple actors, enabling accurate interaction with devices from various distances and through obstructions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surface-based gesture recognition (touch screens, touch pads) is used, then gesture recognition accuracy is high, but user interaction flexibility and distance are limited
Solution Approach 1:
The patent replaces mechanical contact-based gesture recognition (touch screens and touch pads requiring physical contact) with a radar-based electromagnetic field system. The radar system detects gestures through electromagnetic wave reflection from body parts, eliminating the need for surface contact while maintaining accurate gesture recognition through signal processing and pattern recognition algorithms.
2Adaptability or versatility
If in-the-air gesture recognition is implemented, then user interaction flexibility improves, but gesture recognition accuracy deteriorates
Solution Approach 1:
The patent introduces a radar field as an intermediary between the user and the device. The radar field penetrates through obstructions like clothing and furniture, reflecting off body parts to detect gestures in three-dimensional space. This intermediary enables accurate detection of in-the-air gestures without requiring direct line-of-sight or contact, resolving the accuracy problem while maintaining gesture flexibility.
3Reliability
If traditional gesture recognition through obstructions is attempted, then gesture detection is possible, but accuracy and reliability are poor
Solution Approach 1:
The patent changes the detection parameter from optical (camera-based) to electromagnetic (radar-based). Radar waves at specific frequencies can penetrate non-conductive materials like clothing and furniture while reflecting off conductive body parts. This parameter change allows reliable gesture detection through obstructions that block optical sensors, significantly improving both accuracy and reliability in real-world conditions.
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 user interaction by allowing precise and complex gesture recognition in three dimensions, improving accuracy and breadth of gesture recognition, enabling control of multiple devices and applications with ease, even through obstructions like clothing and furniture.
Implementation Method 1
a radar field capable of penetrating fabrics and reflecting off human tissue
Implementation Method 2
reflecting off human tissue
Data Source
AI summary
This document describes techniques using, and devices embodying, radar-based gesture recognition. These techniques and devices can enable a great breadth of gestures and uses for those gestures, such as gestures to use, control, and interact with computing and non-computing devices, from software applications to refrigerators. The techniques and devices are capable of providing a radar field that can sense gestures from multiple actors at one time and through obstructions, thereby improving gesture breadth and accuracy over many conventional techniques.