Non-contact Input System Posture State Filtering
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Solution Overview
Problem
Conventional non-contact human input systems often mistakenly interpret unintended user gestures as intended inputs, leading to unexpected system responses, especially in multi-user scenarios where irrelevant gestures can cause unintended actions such as closing windows or deleting files.
Innovation Solution
A non-contact human input method and system that analyzes a user's posture to determine their input state, ignoring actions not intended as inputs and only recognizing inputs when the user is in a defined input state, using cameras and a processor to capture images and extract figures to assess geometric dimensions and movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the non-contact human input system recognizes all user gestures as inputs, then the system responds quickly to user actions, but unintended gestures are mistakenly interpreted as inputs causing unexpected system responses
Solution Approach 1:
The system changes the parameter of gesture recognition by introducing posture state analysis. Instead of recognizing all gestures equally, the system evaluates whether the user is in an input state by analyzing body posture parameters (such as facing the screen, appropriate distance). This filters out unintended gestures while maintaining recognition of valid inputs, resolving the contradiction between quick response and accurate recognition.
2Ease of operation
If the system ignores posture analysis to simplify operation, then the input method is easier to use, but unintended actions increase frequently
Solution Approach 1:
The system performs preliminary action by analyzing user posture before recognizing gestures as inputs. The posture state determination is executed in advance of gesture recognition, establishing whether the user is in a valid input state. This preliminary check prevents unintended gestures from being processed, improving reliability without significantly complicating the user experience.
3Reliability
If the system implements posture analysis to improve input accuracy, then unintended gestures are filtered out, but the device complexity increases
Solution Approach 1:
The system applies universality by using the existing camera for multiple purposes: both capturing the user's image for gesture recognition and analyzing posture state. This multi-functionality approach allows posture analysis to be implemented without adding separate sensing devices, thereby improving input accuracy while minimizing the increase in device complexity.
Data Source
AI summary
A non-contact human input method is to capture an image in front of a non-contact human input interface of the non-contact human input system, then extract a figure from the image, and then determine whether a user corresponding to the figure is at an input state according to a posture of the figure. The method is to ignore actions of the user when the user is not at the input state. The method is to receive a voice input or a posture input from the user when the user is at the input state. A non-contact human input system includes a displaying device, at least one camera, and a processor electrically connected to the displaying device and the at least one camera. The at least one camera is used to capture an image of a user. The processor implements the above non-contact human input method.