Projector Installation Calibration for Distortion-Free Image Alignment
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Solution Overview
Problem
Existing projector installations lack flexibility in adjusting to varying installation positions and orientations, leading to potential distortions and inaccuracies in projected images due to changes in the relative positional relationship between the projector and the screen.
Innovation Solution
An installation information acquisition method that includes first acquisition processing to determine positional information of adjustment points in a virtual space, projection processing to project index images, and second acquisition processing to adjust the projection direction based on angle information, allowing for accurate installation state determination and correction of projection images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the projector is installed at a fixed predetermined position and orientation, then the projection image can be displayed without distortion, but the installation flexibility and adaptability to different locations are reduced
Solution Approach 1:
The system performs preliminary acquisition of installation information including positional data and angular orientation of the projector before projection begins. This preliminary action allows the system to pre-calculate correction data for trapezoidal and barrel distortions based on the detected installation state, enabling accurate projection without requiring precise manual installation positioning.
Solution Approach 2:
The system implements feedback by detecting the actual installation position and angle of the projector, comparing it with the ideal installation state, and automatically generating correction data to compensate for deviations. This feedback mechanism allows the projector to adapt to various installation locations and orientations while maintaining projection accuracy, thus resolving the contradiction between installation flexibility and projection precision.
2Adaptability or versatility
If the projector installation position and orientation change, then the installation freedom increases, but distortions in the projection image occur
Solution Approach 1:
The system changes parameters by acquiring installation information (position and angle) and dynamically adjusting projection correction parameters based on these changes. When the projector is installed at different positions or orientations, the system calculates appropriate correction values for trapezoidal distortion and barrel distortion, allowing the projection image shape to be maintained accurately despite variations in installation freedom.
3Ease of operation
If manual adjustment of projection direction is performed, then installation simplicity is improved, but measurement precision of installation state deteriorates
Solution Approach 1:
The system implements self-service by automatically detecting the projector's installation position and orientation using sensors or detection devices, and autonomously calculating the necessary correction data without requiring manual measurement or input from installers. This self-service approach maintains installation simplicity while significantly improving the precision of installation state measurement, as the automatic detection system can achieve higher accuracy than manual methods.
Data Source
AI summary
A projector in an installation information acquisition method is installed in a real space, has a changeable projection direction, and projects a projection image based on a virtual image. The virtual image is an image in a case where an image arranged at a display position in a virtual space is viewed from a virtual installation position. The method includes first acquisition processing for acquiring positional information of three or more first adjustment points in the virtual space, projection processing for projecting, by the projector, an index image onto the real space, second acquisition processing for acquiring angle information of the projection direction with respect to a reference direction in a state where the index image matches three or more second adjustment points respectively corresponding to the three or more first adjustment points, and third acquisition processing for acquiring installation information based on the positional information and the angle information.