Gesture Recognition Apparatus Flap Action Determination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gesture recognition systems incorrectly determine returning actions as flap actions when the returning action speed equals or exceeds a threshold value, leading to erroneous gesture recognition.
Innovation Solution
A gesture recognition apparatus that includes an image acquiring unit, a detecting unit, a setting unit, and a determining unit, which sets an effective range for determining flap actions and uses a combination of Haar-like feature vectors and Support Vector Machines to differentiate between flap and returning actions by analyzing the locus of the fingertip position and its motion characteristics within this range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the returning action speed threshold is set to detect fast motions, then fast flap actions can be detected, but returning actions with high speed are erroneously determined as flap actions
Solution Approach 1:
The patent segments the gesture recognition process into distinct phases: flap action detection phase and returning action phase. By dividing the motion detection into these separate stages, the system can apply different determination criteria to each phase, preventing returning actions from being misclassified as flap actions even when they exceed the speed threshold.
Solution Approach 2:
The patent implements preliminary action by setting a predetermined determination period after detecting a flap action. During this period, the system预先 establishes that subsequent high-speed motions are returning actions rather than new flap actions. This preliminary timing constraint prevents erroneous determination before the returning action can be misclassified.
2Reliability
If the determination period is extended to prevent erroneous determination, then returning actions are correctly identified, but the response time for gesture recognition increases
Solution Approach 1:
The patent optimizes the determination period parameter to achieve the best balance between reliability and response time. By carefully tuning this time parameter, the system ensures it is long enough to prevent erroneous determination of returning actions but short enough to maintain acceptable gesture recognition speed. This parameter optimization resolves the contradiction between reliability and time loss.
Data Source
AI summary
A gesture recognition apparatus detects a locus of a fingertip position of a user from an acquired moving image; sets an effective range configured to set an effective range to detect a locus of the fingertip position of the user from the moving image flap action; determines whether or not the locus of the fingertip position is of the flap action when the locus of the fingertip position is included in the effective range; and recognizes a gesture of the user from the flap action when the locus of the fingertip position is of the flap action.