Projection System Screen Posture Sensor Correction
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Solution Overview
Problem
Current projection systems require high computing power and additional hardware to correct image shape and angle relationships between projectors and screens, leading to inefficiencies when feature points are insufficient, resulting in lengthy correction times and increased costs.
Innovation Solution
A projection system and method utilizing a first posture sensor to measure the normal direction of a screen, with a correction controller determining adjustments to the display image based on this information, reducing hardware requirements and processing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If image processing method with CPU/GPU is used to determine three-dimensional position or angle relationship, then image correction can be performed, but hardware cost increases and processing time increases
Solution Approach 1:
The patent replaces the complex CPU/GPU image processing system with a posture sensor-based measurement system. The posture sensor directly measures the screen's normal direction and inclination angle, eliminating the need for complex computational geometry calculations and high-power processing units, thus reducing hardware requirements while maintaining correction precision
Solution Approach 2:
The patent introduces a posture sensor as an intermediary device between the projector and screen system. This sensor directly measures the spatial relationship parameters (normal direction and inclination angle) without requiring complex image processing, serving as a mediator that simplifies the overall system architecture and reduces computational burden
2Reliability
If image processing method is used to determine position or angle relationship, then correction can be performed, but feature points must be sufficient which increases hardware cost
Solution Approach 1:
The patent replaces the feature-point-based image processing method with a direct measurement approach using posture sensors. Instead of relying on sufficient feature points to determine spatial relationships through complex algorithms, the system uses sensors that directly measure the screen's orientation parameters, thereby improving reliability while reducing hardware requirements
3Manufacturing precision
If more expensive hardware is installed to perform correction, then correction can be performed, but a large amount of extra time is required for correction calculation
Solution Approach 1:
The patent performs preliminary measurement of the screen's normal direction and inclination angle using posture sensors before the correction process. By pre-obtaining these spatial parameters, the system eliminates the need for time-consuming real-time image processing and feature point matching, thereby reducing correction processing time while maintaining correction capability
Solution Approach 2:
The patent substitutes the time-consuming CPU/GPU-based image processing system with a rapid posture sensor measurement system. The sensors directly provide the necessary spatial parameters without requiring complex computational algorithms, thereby significantly reducing the correction processing time while maintaining the required correction precision
Data Source
AI summary
The disclosure provides a projection system and a projection method. The projection system includes a screen, a projector, a first posture sensor and a correction controller. The projector projects a display image onto the screen. The first posture sensor is disposed on the screen and configured to measure first angle information of the screen, and the first posture sensor extends along a first direction, and the first direction is parallel to a normal direction of the screen. The correction controller is connected to the projector. The correction controller determines whether to adjust the display image of the projector according to the first angle information. The disclosure further provides a projection method using the projection system. The projection system and projection method of the disclosure have lower hardware requirements and shorter correction processing time.