Multi-Projector Image Stacking via Automatic Lens Shifting
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Solution Overview
Problem
Existing projection systems require lengthy manual calibration and lack accuracy when adjusting multiple projectors for image stacking, making quick re-calibration inconvenient and affecting the effective overlap of projected images.
Innovation Solution
A projection system and method that automatically shifts the projection lens of each projector to align individual representative positions with a common position, using image recognition to facilitate quick and accurate image stacking, allowing for convenient operation of multiple projectors like a single unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual calibration is performed to adjust projection lens shifting, then image stacking can be achieved, but calibration time becomes excessively long
Solution Approach 1:
The patent replaces manual mechanical adjustment of projection lenses with an automatic image recognition and calculation system. The processor automatically calculates lens shifting amounts based on captured image positions, eliminating the need for manual calibration while achieving precise image stacking.
Solution Approach 2:
The system performs self-calibration by automatically capturing images, calculating positions, and adjusting lens shifting without human intervention. The projector system serves itself by using its own imaging capability to determine and correct alignment errors.
2Ease of operation
If manual adjustment of multiple projectors is performed, then image overlap can be achieved, but operation complexity increases
Solution Approach 1:
The system uses captured images as feedback to automatically determine the required lens shifting amounts. The processor analyzes the positions of projected images and calculates the precise adjustments needed, providing a closed-loop control system that simplifies operation.
Solution Approach 2:
The patent introduces an image capturing device and processor as intermediaries between the projectors and the user. These intermediaries automatically handle the complex calibration calculations, shielding the user from complexity while enabling precise multi-projector alignment.
3Adaptability or versatility
If projection lens position shifts during use, then re-calibration is needed, but quick re-calibration cannot be conveniently performed
Solution Approach 1:
The patent replaces manual re-calibration procedures with automatic image-based recalibration. When projection lens position shifts occur, the system can quickly capture new images and recalculate shifting amounts, enabling rapid adaptation without manual intervention.
4Measurement precision
If human eye judgment is used for calibration, then rough adjustment can be made, but accuracy is insufficient
Solution Approach 1:
The patent replaces human eye judgment with an image capturing device and processor that objectively measure image positions and calculate precise shifting amounts. This substitution of mechanical/optical measurement with digital processing significantly improves measurement precision.
Data Source
AI summary
A projection system and a projected image stacking method are provided, in the method, an individual representative position of each captured image is identified, wherein the captured images are obtained by respectively capturing an area projected by multiple projectors, and each individual representative position is related to image content projected by each projector. A common representative position is set in the area. A projection lens of each projector is shifted according to a distance difference between each individual representative position and the common representative position. In this way, the projection lens is quickly shifted, and is further applied to stacking operations. The operation of multiple projectors is as convenient as the operation of a single projector based on control of a remoter or keys of a projector control interface.