Projector Image Correction via Deformable Quadrilateral Grid
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Solution Overview
Problem
Existing projectors require a computer with correction software to geometrically correct projected images, limiting the projector's ability to perform shape correction independently and efficiently.
Innovation Solution
A projector with an image correcting unit that divides image data into quadrilateral regions, allowing users to select and move control points for deformation, enabling geometric correction of projected images without external software, along with features like adjustable grid visibility and OSD images for improved user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a computer with correction software is used to geometrically correct the projected image, then the correction function is achieved, but the projector cannot perform correction independently and the operation becomes complex
Solution Approach 1:
The projector incorporates the image correction function internally, allowing it to perform geometric correction independently without requiring external correction software or a computer. The projector's control unit processes the correction operations directly, making the system self-sufficient and simplifying the overall setup.
Solution Approach 2:
The correction function is merged into the projector itself by integrating the control unit and correction algorithms within the projector's architecture. This combines the projection and correction functions into a single device, eliminating the need for separate correction software and reducing system complexity.
2Difficulty of detecting and measuring
If the projector displays grid lines and control points for correction, then the visibility and ease of correction is improved, but the display complexity increases
Solution Approach 1:
The display control unit changes the color or visual properties of grid lines and control points to enhance their visibility against the projected image. By adjusting display characteristics such as color contrast or brightness, the system makes the correction elements easily detectable without adding complex hardware.
3Manufacturing precision
If the projector allows selection and movement of control points for precise correction, then the correction precision is improved, but the operation complexity increases
Solution Approach 1:
The correction process is segmented into discrete control points that users can individually select and move. By dividing the image into quadrilateral regions with specific control points, the system enables precise local adjustments while maintaining an intuitive interface through the display control unit that guides users through the process.
Data Source
AI summary
A projector is disclosed. The projector divides image data, which should be displayed, into a plurality of quadrilateral regions, displays the vertexes of the divided quadrilateral regions to be superimposed on the image data, causes a user to select one of the displayed vertexes as a selected control point, causes the user to move the selected control point, deforms the quadrilateral regions including the selected control point before the movement as one of the vertexes into a shape including, in vertexes, the moved selected control point, and corrects image data corresponding to the quadrilateral regions before the deformation to be fit in the deformed quadrilateral regions.