Projector Posture Correction via Disturbance Detection
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Solution Overview
Problem
Existing image processing systems fail to provide a comfortable viewing experience when projector posture changes occur due to disturbances, leading to distortion and potential video sickness, especially when projecting wide-angle videos on large screens.
Innovation Solution
An image processing apparatus that detects disturbances using captured images and updates the presenting position of the projector only when necessary, incorporating a disturbance detection section, presenting position update section, and scene change determination to minimize rapid changes and apply effects during updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the presenting position is updated continuously while projecting video content, then the distortion caused by projector posture changes is corrected, but the viewing experience becomes uncomfortable and video sickness may occur
Solution Approach 1:
The patent applies periodic action by updating the presenting position only at specific timing moments (such as scene changes or when disturbance is detected) rather than continuously. This periodic update mechanism corrects distortion when necessary while avoiding unnecessary updates that would cause discomfort and video sickness during smooth video playback.
Solution Approach 2:
The patent employs feedback by detecting disturbance conditions (such as changes in projected image position or appearance) and using this information to determine when to update the presenting position. The feedback loop ensures updates occur only when actually needed, balancing distortion correction with viewing comfort.
2Manufacturing precision
If the presenting position is updated frequently to correct distortion, then the projector posture changes are compensated, but rapid position changes cause video sickness
Solution Approach 1:
The patent uses periodic action by limiting position updates to specific triggering moments (scene changes, disturbance detection) rather than continuous updates. This ensures position accuracy is maintained when needed while preventing rapid, frequent changes that would cause video sickness during normal playback.
Solution Approach 2:
The patent applies preliminary action by preparing the presenting position update in advance at scene change moments or when disturbance is detected, rather than making abrupt changes during playback. This preliminary preparation allows smooth transitions that maintain position accuracy while avoiding sudden jumps that cause video sickness.
3Extent of automation
If online sensing is used to detect corresponding points during projection, then the projector posture can be estimated in real-time, but the system complexity increases
Solution Approach 1:
The patent applies partial action by implementing online sensing only when necessary (at scene changes or when disturbance is detected) rather than continuously. This selective application of sensing reduces system complexity while maintaining real-time posture estimation capability when needed most.
Solution Approach 2:
The patent uses self-service by having the system detect its own disturbance conditions (such as changes in projected image position or appearance) and automatically trigger posture estimation and presenting position updates without external intervention. This self-service approach simplifies the overall system by eliminating the need for complex external monitoring and control mechanisms.
Data Source
AI summary
A camera captures a projection image projected from a projector and generates a captured image and a disturbance detection section detects a disturbance of the projector by using the generated captured image. A posture estimation section compares, when the disturbance is detected, posture information before and after a disturbance detection and a presenting position update section performs an update of a presenting position on only the projector in which there is a change in the compared posture information before and after the disturbance detection.