Projection Apparatus Keystone Correction Segmentation
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Solution Overview
Problem
Existing projection methods struggle with keystone distortion correction, where high-accuracy corrections take too long, causing user discomfort due to waiting, while simple corrections lack sufficient accuracy and may result in tilted image contours.
Innovation Solution
A projection method that performs a first correction calculation and projects a first projection image quickly, followed by a second correction calculation and projection of a second projection image, where the first projection image is displayed before the second, allowing for immediate correction while the more accurate correction is processed in the background.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-accuracy keystone distortion correction is performed, then correction accuracy is improved, but processing time increases significantly
Solution Approach 1:
The patent divides the keystone distortion correction process into two distinct stages: a quick first correction calculation that provides immediate correction, and a more thorough second correction calculation that achieves high accuracy. This segmentation allows the system to provide useful correction quickly while completing the accurate correction in the background, resolving the contradiction between speed and accuracy.
Solution Approach 2:
The first correction calculation performs a preliminary correction of keystone distortion using simplified processing that can be completed quickly. This preliminary action provides immediate benefit to the user while the more accurate second correction calculation is performed in the background, so the user does not perceive the delay.
2Loss of time
If simple keystone distortion correction is performed, then processing time is reduced, but correction accuracy deteriorates and image contour may be tilted
Solution Approach 1:
The correction process is segmented into a first correction calculation that uses simplified processing for speed, and a second correction calculation that uses more thorough processing for accuracy. Both results are projected sequentially, ensuring that the user first sees a corrected image quickly, then sees the more accurate correction without noticing the transition time.
3Productivity
If only one correction calculation is performed, then processing time is minimized, but correction accuracy is insufficient
Solution Approach 1:
The first correction calculation serves as a preliminary action that quickly provides a corrected projection image. This preliminary correction is then refined by the second correction calculation in the background, ensuring that both speed and accuracy are achieved without the user perceiving the total processing time.
Data Source
AI summary
A projection method includes performing a calculation for high-speed correction of a shape of a projection image, projecting a provisional corrected image based on a calculation result thereof on a projection surface, performing a calculation for high-accuracy correction of the shape of the projection image, and projecting a settled corrected image based on a calculation result thereof on the projection surface. A processing time for obtaining the calculation result for the high-speed correction of the shape of the projection image is a first time, a processing time for obtaining the calculation result for the high-accuracy correction of the shape of the projection image is a second time longer than the first time, and the provisional corrected image is projected on the projection surface prior to the projection of the settled corrected image on the projection surface.