Operation Surface Input Validation Using Closest-Portion Movement
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Solution Overview
Problem
Existing non-contact operation systems inaccurately determine the intended input position on an operation surface due to unintended portions of an operation object, such as the wrist or abdomen, becoming the closest portion during a non-contact operation, leading to erroneous input.
Innovation Solution
An information processing apparatus that detects the closest portion to the operation surface and invalidates or warns against input when the distance between detected positions exceeds a threshold, ensuring accurate input determination by considering the user's intended operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the closest portion detection method is used to determine instruction input position, then non-contact operation capability is enabled, but erroneous input occurs when unintended portions become the closest portion
Solution Approach 1:
The system continuously monitors the position of the closest portion over time and provides feedback by comparing its movement pattern against expected operational patterns. When the closest portion's movement deviates from normal operation (e.g., when body parts like wrist or abdomen accidentally become the closest portion), the system detects this anomaly and invalidates the input, thereby maintaining input accuracy while preserving non-contact operation capability
Solution Approach 2:
The system performs preliminary detection of the closest portion's position and movement pattern before finalizing the input recognition. By anticipating potential erroneous inputs through preliminary monitoring of closest portion behavior, the system can preemptively invalidate suspicious inputs before they are processed, preventing erroneous input while maintaining versatile non-contact operation
2Ease of operation
If the closest portion position is used directly as instruction input position, then simple operation is achieved, but unintended operations occur due to body parts interference
Solution Approach 1:
The system implements feedback by continuously tracking the movement trajectory of the closest portion and comparing it against valid operation patterns. When the movement pattern indicates unintended operation (such as body parts accidentally becoming the closest portion), the system provides feedback by invalidating the input, thus preventing harmful unintended operations while maintaining simple operation interface
Solution Approach 2:
The system introduces an intermediary validation mechanism between the closest portion detection and the final input execution. This intermediary layer analyzes whether the detected closest portion corresponds to a legitimate operation target or is caused by body parts interference, allowing the system to filter out unintended operations while preserving the simplicity of the direct closest-portion-to-input mapping
Data Source
AI summary
An information processing apparatus includes a processor configured to: detect a closest portion being a portion having a shortest distance from an operation surface in a perpendicular direction of the operation surface among portions of an object in a spatial region facing the operation surface; determine a position on the operation surface corresponding to a position of the closest portion as an instruction input position by a non-contact operation of a user; and, in a case where a distance between a first position of the closest portion detected at a first time point and a second position of the closest portion detected at a second time point after the first time point, in a plane direction parallel to the operation surface is equal to or longer than a threshold distance, invalidate an instruction input on a position on the operation surface corresponding to the second position.