Projection Control Point Selection for Accurate Image Correction
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Solution Overview
Problem
Existing projection image correction methods fail to accurately adjust the position of a projection image due to user error, such as a shaky hand, leading to incorrect corrections.
Innovation Solution
A method and system that project a pattern image with control points, capture images of the projection surface, and use a pointing element to select and adjust control points based on detected light conditions, allowing for precise correction of the projection image position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a user uses a pointing apparatus to correct the position of a projection image, then the ease of operation is improved, but the reliability deteriorates due to user error such as shaky hand causing wrong position selection
Solution Approach 1:
The system displays a pattern image with multiple candidate control points before the user makes a selection. The user points to a rough area, and the system preliminarily identifies candidate points within that area, allowing the user to confirm the correct point from the candidates rather than requiring precise single-shot selection.
Solution Approach 2:
The system provides visual feedback by displaying candidate control points on the projection image and allowing the user to confirm or re-select. This feedback loop enables the user to correct mistakes and verify the selected control point, improving reliability while maintaining ease of operation.
2Manufacturing precision
If the system requires precise pointing to select control points, then the manufacturing precision is improved, but the ease of operation deteriorates due to difficulty in accurate selection
Solution Approach 1:
The selection process is segmented into two stages: first, the user points to a rough area containing candidate control points; second, the system presents multiple candidate points for confirmation. This segmentation reduces the precision requirement for the initial pointing action while maintaining accurate control point selection.
Solution Approach 2:
The system displays multiple candidate control points (excessive action) within the pointed area rather than requiring exact single-point selection. This allows the user to easily select from candidates, reducing the precision burden while ensuring accurate control point identification.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and user-friendly correction of projection image positions by selecting and adjusting control points using a pointing element, improving the precision and reliability of image alignment.
Implementation Method 1
an imaging apparatus that captures images of the projection surface
Implementation Method 2
a pointing element that irradiates the projection surface with light that satisfies a condition corresponding to a user's operation
Data Source
AI summary
When a camera detects light which satisfies a first condition and with which a projection surface is irradiated by a pointing apparatus in captured images formed by capturing the projection surface, the camera selects at least one of a plurality of control points as a control point in a selected state based on the position of the light which satisfies the first condition in the captured images, whereas when the camera detects light which satisfies a second condition different from the first condition and with which the projection surface is irradiated by the pointing apparatus in the captured images, the camera transmits an instruction to change the position of the control point in the selected state to a projector based on a change in the position of the light which satisfies the second condition and is detected in the captured images.