Projection Display System Dynamic Ratio Correction
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Solution Overview
Problem
Existing projection systems face challenges in maintaining image quality when projecting large images onto non-planar surfaces, such as arc or wave-shaped screens, due to warping and bright band issues caused by improper adjustments and overlapping projection regions.
Innovation Solution
A projection display system with a computing device and image capturing device that allows users to dynamically adjust projection ratios and boundaries through a control interface, using control points and internal boundaries to correct image warping and brightness issues, thereby enhancing image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple projection devices are used to project large images, then the screen width and brightness performance are improved, but the projection regions overlap causing bright bands that decrease projection quality
Solution Approach 1:
The system dynamically adjusts the projection ratio parameter based on the captured image geometry. By calculating the actual projection region boundaries from the captured image and comparing them with the ideal rectangular boundaries, the system determines a projection ratio that corrects the overlapping issue. This parameter adjustment resolves the bright band problem while maintaining the benefits of multiple projection devices.
2Area of stationary object
If the projection surface is non-planar (arc or wave-shaped), then large size display is achieved, but the imaging frame becomes warped decreasing projection quality
Solution Approach 1:
The system uses an image capturing device to capture the actual projection regions on the non-planar surface, then feeds this information back to the main control machine. The control machine calculates the deviation from ideal rectangular projection and adjusts the projection ratio accordingly. This closed-loop feedback mechanism enables real-time correction of warping effects on non-planar surfaces.
Solution Approach 2:
The projection ratio is dynamically adjusted based on the captured image geometry. By comparing the actual projection region boundaries with ideal boundaries, the system calculates the appropriate projection ratio parameter to correct warping. This parameter change adapts the projection to the non-planar surface while maintaining image frame accuracy.
3Ease of operation
If the projection regions are adjusted manually, then the control flexibility is improved, but the adjustment precision decreases due to improper positioning
Solution Approach 1:
The system replaces manual mechanical adjustment with automated image processing and calculation. The image capturing device captures the projection regions, and the main control machine automatically calculates the optimal projection ratio and boundary adjustments. This substitution of mechanical manual positioning with automated optical-mechanical systems significantly improves positioning accuracy while maintaining control flexibility through software interfaces.
Data Source
AI summary
A projection display system and a correcting method are provided. The projection display system includes a plurality of projection devices, an image capturing device, a blending device and computing device. The projection devices are configured to project a plurality of projection regions to a projection surface. The image capturing device is configured to capture an image on the projection surface. The computing device determines locations of the projection regions according to the image captured by the imaging capture device. A display screen of the computing device is configured to display a control interface including a display screen region proportionally corresponding to the projection regions. The computing device dynamically adjusts a projection ratio of an image frame displayed on the projection region by adjusting locations of control points on the display screen region and a space between the control points.