User Position Detection Axis Segmentation for 3D Tracking
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Solution Overview
Problem
Existing skin detection techniques for user position tracking in information processing devices often result in inaccurate three-dimensional position detection, leading to unintended processes such as pointer movement or click detection when the user intends to perform only horizontal or vertical movements, due to variations in detection accuracy.
Innovation Solution
An information processing device with a user position detection unit, calculation unit, setting unit, and execution unit that calculates user movement information based on coordinate axes, allowing for precise execution of intended processes by distinguishing between different movement directions and velocities, and displaying relevant information on a display unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional position is detected based on skin region, then user position tracking is enabled, but detection accuracy varies causing unintended processes
Solution Approach 1:
The patent segments the three-dimensional position detection into independent axis evaluations. Instead of treating (x, y, z) as a unified position, the system separately analyzes movement along each coordinate axis, evaluating the magnitude of movement on each axis independently to determine the user's intent.
Solution Approach 2:
The patent introduces dynamic threshold evaluation for movement detection. The system calculates the magnitude of movement on each axis and compares it against thresholds to dynamically determine whether a movement is intentional, allowing the system to adapt its response based on the actual movement characteristics rather than using fixed detection criteria.
2Ease of operation
If hand movement in X and Y directions is detected, then pointer movement is performed, but Z direction variation causes unintended click detection
Solution Approach 1:
The patent separates pointer movement control from click detection by evaluating axis movements independently. Pointer movement is triggered by significant movement on X or Y axes, while click detection requires significant movement on the Z axis, preventing false click detections during normal pointer manipulation.
Solution Approach 2:
The system uses dynamic threshold comparison for each axis to determine user intent. By calculating the magnitude of movement on each axis and comparing against thresholds, the system can distinguish between intentional pointer movements and unintentional variations, executing only the processes that match the user's intent.
3Adaptability or versatility
If skin detection technique is used, then user position can be tracked, but detection accuracy causes both intended and unintended processes to be executed
Solution Approach 1:
The patent applies segmentation by dividing the position detection into independent axis evaluations. This allows the system to maintain versatility in detecting various user interactions while improving reliability by analyzing each axis separately to determine the true user intent behind each movement.
Solution Approach 2:
The system employs dynamic threshold evaluation to adaptively determine user intent based on actual movement characteristics. This dynamic approach allows the system to maintain high adaptability for different interaction types while ensuring reliable process execution by comparing movement magnitudes against thresholds to filter out detection variations.
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
Enables correct execution of user-intended processes by accurately differentiating between intended and unintended movements, preventing errors in pointer movement and click detection processes.
Implementation Method 1
a difference between a luminance value of a first image obtained by imaging a subject (user) which is irradiated with light of a wavelength λ1 and a luminance value of a second image obtained by imaging the subject which is irradiated with light of a wavelength λ2 different from the wavelength λ1
Data Source
AI summary
An information processing device includes: a user position detection unit that detects a user position indicating a position of a user indicated by a plurality of values on different coordinate axes; a calculation unit that calculates user movement information indicating a movement of the user based on a coordinate point defined by a value on at least one axis among the plurality of values on coordinate axes indicating the user position; a setting unit that sets a process to be executed among a plurality of processes performed according to a movement of the user based on the calculated user movement information; and an execution unit that executes the set process.