Hand Gesture Recognition via Feature Point Segmentation
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Solution Overview
Problem
Existing user interface systems struggle to accurately distinguish between hand gestures for command input and hand movements for direction input, leading to misrecognition and incorrect execution of commands.
Innovation Solution
An input user interface device equipped with an image pickup unit, shape detection unit, and command deciding unit that determines whether the detected object shape corresponds to a gesture command or a position designation command, allowing for precise differentiation and execution of commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a direction-input user interface and gesture recognition are combined, then the system can recognize both hand movement for cursor control and hand gestures for command input, but the control unit may misrecognize the user's action and execute incorrect commands
Solution Approach 1:
The patent segments the hand object into multiple feature points (tips of fingers, joints, palm center) and tracks their relative positions and movements independently. By analyzing the movement patterns of individual feature points rather than treating the hand as a single entity, the system can distinguish between directional movement (where all points move together) and gestural movement (where points move differently relative to each other), thereby resolving the misrecognition problem while maintaining both input modes
Solution Approach 2:
The patent dynamically adjusts the recognition logic based on the detected movement type. When the hand moves as a rigid body (all feature points maintaining fixed relative positions), the system interprets it as directional input for cursor control. When the hand shape changes (feature points move differently), the system interprets it as a gesture command. This dynamic switching between recognition modes eliminates misrecognition while preserving versatility
2Ease of operation
If the control unit recognizes hand gestures to execute commands, then gesture-based control is enabled, but the system may misinterpret gesture as direction input or vice versa
Solution Approach 1:
The patent implements feedback by continuously monitoring the relative positions and movements of hand feature points throughout the interaction. The system provides real-time distinction between gesture and directional movement through shape analysis, allowing the control unit to accurately determine user intent. This feedback mechanism prevents misinterpretation by constantly verifying whether the hand shape remains consistent (directional input) or changes (gesture command)
Data Source
AI summary
An input user interface device includes an image pickup unit which picks up an image including an object image, a shape detection unit which detects a shape of the object image in the image picked up by the image pickup unit, a determination unit which determines whether the shape of the object image detected by the shape detection unit corresponds to a shape associated with a gesture command or a shape associated with a position designation command for designating a position data, and a command deciding unit which decides the gesture command or the position designation command on the basis of the decision by the deciding unit.