Dynamic Image Rotation for Interactive Projector User Convenience
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Solution Overview
Problem
Existing interactive systems with projectors face challenges in user convenience due to fixed projection directions, making it difficult for users to operate images effectively from various positions around a horizontal projection surface.
Innovation Solution
An image processing device equipped with a detection section to identify the pointing direction of a light emitting pen and a rotation section that adjusts the image projection direction, scale, and position to optimize user interaction, allowing the image to be rotated and scaled for easier operation without distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the projection direction is fixed to a predetermined direction, then the projector structure is simple, but the user convenience is insufficient when operating from various positions
Solution Approach 1:
The projection direction is made dynamic rather than fixed. The system automatically adjusts the projection direction based on the detected position of the pointing body, allowing the projection surface to rotate and adapt to different user positions around the desk, thereby improving user convenience without requiring complex manual adjustment mechanisms
Solution Approach 2:
The system incorporates feedback from the detection section that detects the pointing body position. This feedback is used by the rotation section to automatically adjust the projection direction, creating a closed-loop system that adapts to user position and improves convenience while maintaining relatively simple projector hardware
2Ease of operation
If the image is rotated to change direction, then the user convenience is enhanced, but the image may become deflected or distorted
Solution Approach 1:
The system changes multiple parameters simultaneously - rotation angle, scale size, and projection position - to achieve the desired direction while maintaining image accuracy. The rotation section calculates appropriate rotation angles based on pointing body position, and the scale change section adjusts the image scale to prevent distortion during rotation
Solution Approach 2:
The system dynamically adjusts both the rotation angle and scale size based on real-time detection of the pointing body position. This dynamic adaptation allows the image to be rotated to the correct orientation while automatically adjusting the scale to prevent any deflection or distortion, maintaining both user convenience and image accuracy
3Device complexity
If the image is rotated without scale change, then the rotation is simple, but the image becomes deflected
Solution Approach 1:
The system changes both the rotation angle and scale size parameters together. The rotation section determines the appropriate rotation angle based on pointing body position, while the scale change section simultaneously adjusts the image scale to prevent deflection. This coordinated parameter change achieves both simple rotation processing and accurate image display
4Adaptability or versatility
If the projection direction is fixed, then the device complexity is low, but the adaptability to different user positions is poor
Solution Approach 1:
The projection direction is transformed from a fixed parameter to a dynamic one that automatically adapts to user position. The rotation section adjusts the projection direction based on real-time detection of the pointing body position, enabling the system to adapt to different user positions around the desk without requiring complex manual reconfiguration
Solution Approach 2:
The system uses feedback from the detection section that continuously monitors the pointing body position. This feedback drives the rotation section to automatically adjust the projection direction, creating an adaptive system that responds to user position changes while maintaining relatively simple hardware architecture
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
Enhances user convenience by dynamically adjusting the image projection to align with the user's operation direction, ensuring the image can be easily accessed and operated from any position, preventing deflection or distortion.
Implementation Method 1
the detection section detects the pointing direction based on a distribution of an intensity of light emitted by the pointing body
Implementation Method 2
The light emitting pen is a pointing body for emitting an infrared ray from the pen tip
Data Source
AI summary
An image processing device includes a detection section adapted to detect a pointing direction of a pointing body, and a rotation section adapted to rotate an image based on the pointing direction detected by the detection section.