Multi-Projector Display Alignment via View Projection Matrix
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Solution Overview
Problem
Existing methods for creating a unified display from multiple projectors require excessive effort and equipment, and often result in display artifacts such as jagged lines due to alignment and placement issues, making seamless integration of multiple projectors difficult.
Innovation Solution
A method that uses a View Projection Matrix (VPM) to map projector coordinates to camera coordinates, detect and correct row and column shifts, and generate gradient weightings for seamless blending across the display, employing a system with a computer running LINUX or MICROSOFT WINDOWS to control up to eight projectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple projectors are used to create a large unified display, then the display area is increased, but display artifacts such as jagged lines and poor alignment appear
Solution Approach 1:
The patent applies parameter changes by modifying the projection parameters (such as projection angle, distance, and orientation) of each individual projector through computational analysis. The system calculates optimal projection parameters for each projector based on their spatial relationships and applies these parameters to correct alignment issues, thereby resolving the contradiction between increased display area and maintained alignment precision.
2Area of stationary object
If multiple projectors are used to create a large unified display, then the display area is increased, but the complexity of configuration and operation increases
Solution Approach 1:
The patent merges the control and configuration of multiple projectors into a unified computational framework. By integrating all projector parameters and spatial relationships into a single computational model, the system automatically determines optimal settings for the entire multi-projector system, thereby reducing configuration complexity while maintaining large display area capability.
Solution Approach 2:
The system performs self-service by automatically calculating and adjusting projection parameters without requiring manual configuration. The computational analysis autonomously determines the optimal settings for each projector based on their spatial relationships, eliminating the need for complex manual alignment procedures and reducing operational complexity.
3Ease of operation
If traditional alignment methods are used for multiple projectors, then the setup process is simplified, but display artifacts such as jagged lines and poor alignment persist
Solution Approach 1:
The patent replaces traditional mechanical alignment methods with a computational approach. Instead of manually adjusting physical projector positions and angles, the system uses computational analysis to calculate optimal projection parameters and applies these through software control, thereby maintaining ease of operation while significantly improving alignment precision and eliminating display artifacts.
Data Source
AI summary
A method for correcting a projection from a plurality of digital projectors is provided. The method includes receiving as an input a matrix which maps each pixel to be projected to a captured pixel that includes a row value and a column value and detecting a shift with respect row or column values in the matrix. The method further includes determining attributes of the shift, wherein the attributes include a type for the shift and an overlap length for the shift. A gradient length is determined from the overlap length. A gradient of pixel weightings is generated for each gradient length. The pixel weightings are uniformly sloping and are associated with pixels in the gradient length and neighboring pixels. Intersecting gradients re merged and a list that includes common points and diagonal points is created from the merging process. The method operations may be embodied as code on a computer readable storage medium.