Projection Control Device Using Imaging Continuity for Position Adjustment
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Solution Overview
Problem
Existing projection systems face challenges in accurately adjusting the projection position, particularly when dealing with complex surfaces or environments where traditional detection methods fail, such as when marker images are distorted or not continuously present.
Innovation Solution
A control device and method that utilize imaging data to determine the continuity of a projection image, performing first control to move the projection range in one direction until continuity is lost, and second control to adjust the range via image processing until continuity is regained, ensuring accurate alignment of the projection with the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional detection methods are used to adjust projection position, then the system is simple to operate, but the measurement precision deteriorates in complex surfaces or environments where marker images are distorted or not continuously present
Solution Approach 1:
The system uses the projection apparatus itself to project marker images and the imaging device to capture them, eliminating the need for separate recognition devices. The control device processes the captured images to detect marker positions and calculate projection position corrections, allowing the system to self-adjust without external equipment.
Solution Approach 2:
The patent replaces traditional mechanical or manual detection methods with an optical-imaging-based detection system. Instead of using physical markers or complex recognition devices, the system uses projected marker images captured by an imaging device, with position detection performed through image processing algorithms.
2Measurement precision
If marker images are used for detection, then the measurement precision improves, but the reliability worsens when marker images are distorted or not continuously present
Solution Approach 1:
The system performs preliminary projection of marker images at multiple positions before final projection position determination. By pre-projecting markers at candidate positions and evaluating their detection quality, the system can identify the optimal projection position in advance, ensuring reliable detection even in challenging environments.
Solution Approach 2:
The patent projects marker images at multiple positions beyond the final desired projection area. This excessive action allows the system to evaluate detection quality at various positions and select the optimal one, ensuring that at least some marker images are clearly detectable even when the environment is challenging.
3Area of stationary object
If the projection range is adjusted to cover the entire surface, then the area of projection increases, but the manufacturing precision deteriorates due to inaccurate position adjustment
Solution Approach 1:
The patent divides the projection adjustment process into multiple discrete steps: projecting marker images at initial positions, detecting marker positions, calculating correction amounts, and adjusting the projection range incrementally. This segmented approach allows precise position adjustment at each step while progressively expanding coverage to the entire surface.
Solution Approach 2:
The system implements a feedback loop where the imaging device captures marker images, the control device detects marker positions and calculates projection position errors, and the projection apparatus adjusts its position based on these calculations. This closed-loop feedback ensures high alignment precision while expanding projection coverage to cover the entire surface.
Data Source
AI summary
A control device includes a processor, and the processor is configured to: determine, based on imaging data of a projection image of a first image projected by a projection apparatus, continuity of the projection image of the first image; perform first control of moving a boundary, in a first direction, of a projection range of the projection apparatus to the first direction at least until the processor determines that the continuity is not present; and perform second control of moving a boundary, in the first direction, of a projection range of the first image to a second direction opposite to the first direction via image processing at least until the processor determines that the continuity is present, after the first control.