Projector Image Correction with Vertex-Guided Dot Pattern Feedback
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Solution Overview
Problem
Existing projection technologies struggle to accurately correct image distortion on projection surfaces with complex shapes.
Innovation Solution
A method involving projecting a first image, accepting vertex position changes, deforming a second image with multiple figures based on user operation, capturing the projected image, generating correction data, and projecting the corrected image using the generated data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional distortion correction methods are used, then correction can be performed on simple projection surfaces, but accurate correction cannot be achieved on complex-shaped surfaces
Solution Approach 1:
The patent divides the projection surface into multiple regions by detecting and marking feature points (such as corners or distinctive locations) on the surface. By segmenting the surface into these discrete regions and establishing correspondence between the projected image and captured image at these points, the system can accurately calculate distortion correction parameters for each region, enabling precise correction on complex-shaped surfaces.
Solution Approach 2:
The patent implements a feedback mechanism where the projected image is captured by an image pickup device, and the captured image is used to generate correction parameters that feed back into the projection system. This closed-loop feedback allows the system to continuously adjust and refine distortion correction based on actual projection results, achieving high accuracy on complex surfaces.
2Manufacturing precision
If correction parameters are adjusted manually, then some distortion can be corrected, but the process is time-consuming and imprecise
Solution Approach 1:
The patent enables the system to automatically determine correction parameters without manual intervention. By having the system itself project test patterns, capture the projected image, and compute correction parameters based on the captured image, the system performs self-service correction. This automated approach eliminates time-consuming manual adjustment while maintaining high precision through computational algorithms.
Solution Approach 2:
The patent replaces manual mechanical adjustment of correction parameters with an automated image processing system. Instead of physically adjusting projection settings, the system uses image capture and digital signal processing to automatically calculate and apply correction parameters, substituting mechanical operations with electronic and computational processes that are faster and more precise.
Data Source
AI summary
A controller of a projector accepts operation of changing the position of a vertex of a first pattern image projected on a projection surface, deforms the shape of a second pattern image containing a plurality of dots based on the operation, causes the second pattern image to be projected onto the projection surface, generates second correction data for correction of the second image based on a captured image as a result of capture of an image of the projection surface on which the second pattern image has been projected in such a way that the positions of the plurality of dots are corrected, and causes an image corrected by using the generated correction data to be projected onto the projection surface.