Unified Coordinate System for Multi-Camera Projector Alignment
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Solution Overview
Problem
Current image projection systems are inconvenient for users to adjust projector videos across wide areas, as captured images from multiple cameras do not provide a clear intuitive view of the entire video, and pixel alignment between cameras and projectors is difficult due to differing resolutions.
Innovation Solution
An image adjustment system that includes an image projection device, an imaging device capturing overlapping regions of the projected image, and a controller converting coordinate systems into a combined system to generate correction information for accurate alignment and intuitive adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple cameras capture images of different regions of the projected video, then the system can cover wide projection areas, but the user cannot intuitively adjust the entire video due to lack of unified coordinate view
Solution Approach 1:
The patent merges multiple captured images from different cameras into a single composite image by unifying their coordinate systems. This allows users to view and adjust the entire projected video area through one unified interface, resolving the contradiction between covering wide areas and maintaining intuitive adjustability.
2Area of stationary object
If images are captured using multiple cameras with different resolutions, then the system can capture wide areas, but pixel alignment between cameras and projectors becomes difficult
Solution Approach 1:
The patent changes the coordinate system parameters of each captured image to match a unified reference frame. By transforming the coordinate parameters of multiple cameras to a common system, the patent achieves accurate pixel alignment across all images and between cameras and projectors, resolving the alignment precision issue.
3Adaptability or versatility
If the system uses separate coordinate systems for each camera image, then the system can accommodate different camera perspectives, but the user cannot easily visualize the complete projection area
Solution Approach 1:
The patent introduces a unified coordinate system as an intermediary that translates and reconciles the different coordinate systems of multiple cameras. This intermediary layer allows each camera's perspective to be preserved while providing a common reference frame that displays the complete projection area, preventing loss of overall context.
Data Source
AI summary
An image adjustment system includes: an image projection device that projects a projected image onto a projection target; an imaging device that acquires a first image by capturing an image of a first region including a part of the projected image and a second image by capturing an image of a second region including another part of the projected image, the second region including an overlapping region in which the first region and the second region overlap; and a controller that controls a projection position of the projected image. The controller converts a first and a second coordinate systems of the first and the second images into a combined coordinate system common to the first image and the second image, generates correction information including position information indicating a projection area of the image projection device in the combined coordinate system, and generates the projected image based on the correction information.