Virtual Touch Reference Point Control for Intended Image Manipulation
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Solution Overview
Problem
Users experience a feeling of strangeness when image enlargement or rotation occurs at positions not intended by them in virtual touch systems due to the detection of fingertip movements in the air.
Innovation Solution
A control apparatus and method that sets a reference point on a display based on the midpoint between two body parts of a user, such as fingertips and an eye, to perform image processing with reference to this point, ensuring movements align with the user's intended viewpoint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If image enlargement or rotation is performed based on detected fingertip movement in virtual touch systems, then the system can respond to user gestures, but the user experiences a feeling of strangeness when operations occur at unintended positions
Solution Approach 1:
The patent introduces a reference point on the display surface as an intermediary between the detected fingertip movement and the image operation. This reference point serves as a mediator that translates the user's gesture into a meaningful operation location, resolving the disconnect between gesture detection and intended operation target. The reference point is determined based on the relationship between multiple detected body parts, creating a reliable mapping between physical gesture and digital operation.
Solution Approach 2:
The patent transitions from two-dimensional fingertip position detection to three-dimensional spatial relationship analysis by incorporating depth information or multiple detection points. By considering the spatial relationship between multiple body parts (fingertips, palm, etc.) in 3D space, the system can more accurately determine the user's intended operation target and reduce the feeling of strangeness caused by incorrect operation locations.
2Device complexity
If the system uses simple fingertip detection for image manipulation, then the control mechanism is simple, but the operation does not align with the user's intended viewpoint
Solution Approach 1:
The patent segments the user's body into multiple detectable parts (fingertips, palm, wrist, etc.) rather than treating the gesture as a single point. By detecting and analyzing the spatial relationships between these segmented body parts, the system can more accurately determine the user's intended viewpoint and operation target while maintaining a relatively simple control mechanism that builds upon basic detection capabilities.
Solution Approach 2:
The patent performs preliminary analysis of the spatial relationships between multiple body parts before determining the final operation target. By pre-processing the detected body part positions to establish coordinate relationships and determine the reference point in advance, the system can more accurately align operations with the user's intended viewpoint without adding significant complexity to the real-time control mechanism.
Data Source
AI summary
In a control apparatus, a reference point setting unit receives spatial coordinates of each of a first part, a second part, and a third part of a body of a user located in front of a display, identifies a midpoint between the spatial coordinates of the first part and the spatial coordinates of the second part, and sets a point on the display intersecting a virtual straight line passing through the midpoint identified and the spatial coordinates of the third part as a reference point. A function execution unit performs a process, determined by a movement of the first part and the second part, on an image displayed on the display, with reference to the reference point set.