Projector Grid Point Selection With Enlarged and Thumbnail Views
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Solution Overview
Problem
Existing image correction methods for projectors, such as those described in JP-A-2021-44813, face challenges in maintaining the user's ability to recognize the positional relationship between grid points when the image is enlarged, making it difficult to accurately select and correct geometric distortions on non-flat or uneven surfaces.
Innovation Solution
A control method and device that display an adjustment image with multiple control points, allowing for a first enlarged image of a part of the adjustment image to be viewed, and enabling the selection of these points using a pointing image, facilitating precise geometric distortion correction on various surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the preview image is displayed in an enlarged manner, then it becomes easy for the user to select the grid points, but it becomes difficult for the user to recognize the positional relationship in the whole of the preview image between the grid points
Solution Approach 1:
The patent introduces a third dimension by displaying both the enlarged preview image and the thumbnail image simultaneously on the display screen. The thumbnail provides an overview view showing the positional relationships of all grid points, while the enlarged preview image allows detailed selection. This multi-dimensional display approach resolves the contradiction by providing both detailed view and contextual view in different spatial dimensions of the display.
Solution Approach 2:
The patent implements a nested display structure where the thumbnail image (showing overall positional relationships) contains or is displayed alongside the enlarged preview image (showing detailed grid point information). The user can navigate between these nested views, with the thumbnail serving as a container context for the detailed preview, allowing simultaneous access to both global positional context and local selection details.
2Measurement precision
If the adjustment image is enlarged for detailed correction, then selection precision improves, but the overall positional context is lost
Solution Approach 1:
The patent uses dual-display dimensions to resolve this contradiction. The thumbnail image maintains the overall positional context at a reduced scale, while the enlarged preview image provides high-precision control point selection. Both dimensions coexist on the display, allowing the user to switch between or reference both views simultaneously, thus preserving both precision and context.
Solution Approach 2:
The thumbnail image is displayed in advance to provide the user with an overview of the entire adjustment image and the relative positions of all control points before the user begins detailed selection work on the enlarged preview image. This preliminary contextual view helps the user understand the global structure before focusing on local details.
Data Source
AI summary
A control method includes displaying a display image including an adjustment image constituted by a plurality of control points, displaying a first enlarged image including a first enlarged adjustment image obtained by enlarging a part of the adjustment image, and receiving an operation input configured to select the control point using a pointing image configured to point any of the plurality of control points.