Projected Image Indicator Position Detection Using Motion Sensing
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Solution Overview
Problem
Existing technologies face challenges in accurately detecting the instruction position of an indicator in a projected image, particularly in systems that combine optical and motion detection sub-systems, which can be complex and costly.
Innovation Solution
An instruction position detection device and method that utilizes a processor to acquire the movement amount of an indicator, project a setting image for setting the origin of the instruction position, and detect the instruction position based on the input result of an operator's setting operation, using a combination of sensors and projection apparatus to facilitate precise detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a hybrid tracking system consisting of optical tracking subsystem and motion/direction detection subsystem is used, then the instruction position detection accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the complex optical tracking subsystem from the hybrid system, retaining only the motion/direction detection subsystem based on acceleration sensors. This extraction maintains sufficient detection accuracy for indicator position while dramatically reducing system complexity and cost by removing the imaging apparatus and optical tracking components.
Solution Approach 2:
The patent replaces expensive, complex optical tracking components with inexpensive acceleration sensors and computational algorithms. The motion detection subsystem uses low-cost sensors that provide adequate performance for the specific application of detecting indicator movement in projection systems, eliminating the need for costly optical infrastructure.
2Measurement precision
If additional imaging apparatus is added to detect indicator position, then the detection accuracy is improved, but the manufacturing cost increases
Solution Approach 1:
The patent removes the additional imaging apparatus from the system architecture and replaces it with a computational approach using acceleration sensor data. This extraction eliminates the need for expensive cameras, lenses, and image processing hardware while maintaining the capability to accurately detect indicator position through mathematical calculation of movement from sensor readings.
Solution Approach 2:
The patent substitutes mechanical/optical detection systems (imaging apparatus) with an electronic sensor-based system. Acceleration sensors electronically detect motion, and computational algorithms process this data to determine position, replacing the need for physical imaging components and reducing manufacturing complexity and cost.
3Measurement precision
If a hybrid tracking system with optical and motion detection is implemented, then the instruction position detection capability is improved, but the ease of operation deteriorates due to system complexity
Solution Approach 1:
The patent extracts and removes the optical tracking subsystem that requires complex calibration and setup procedures. The remaining motion detection system based on acceleration sensors is inherently simpler to operate, as it automatically tracks indicator movement without requiring manual configuration of optical paths, camera parameters, or synchronization settings.
Solution Approach 2:
The motion detection subsystem using acceleration sensors operates autonomously without requiring manual calibration or complex setup. The system self-calibrates by detecting the indicator's movement patterns and automatically calculates position information, eliminating the need for operator intervention in complex configuration procedures and improving ease of operation.
Data Source
AI summary
An instruction position detection device includes: a processor that acquires a movement amount of an instruction position of an indicator capable of detecting the movement amount, and performs a control of projecting, from a projection apparatus, an image including a setting image for setting an origin of the instruction position of the indicator, and the processor is configured to: acquire an input result of a setting operation of an operator in a state where an instruction for a position indicated by the setting image in a projected projection image is provided by the indicator; and perform a control of detecting the instruction position of the indicator in the image based on the position of the setting image in the image and the movement amount after the input result of the setting operation is acquired.