Projection Image Calibration for Intersecting Planes
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Solution Overview
Problem
Existing projection methods fail to accurately calibrate images for multiple projection planes, leading to deformation and poor calibration accuracy when projecting images onto intersecting planes.
Innovation Solution
A method and device that adjust the image by dividing it into sub-images based on the imaging proportion on each plane, calibrating each sub-image with a specific calibration matrix set for each plane, and projecting these calibrated sub-images onto the respective planes to ensure the image edge is perpendicular to the intersection line, thereby preventing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the same calibration matrix is used for the whole projection image when projecting to multiple planes, then the projection image on one plane can be displayed normally, but the projection images on other planes will deform
Solution Approach 1:
The patent divides the projection image into multiple sub-images corresponding to different projection planes, and applies separate calibration matrices to each sub-image. This segmentation allows each plane to be calibrated independently, resolving the contradiction between achieving accurate calibration on one plane while maintaining capability for multiple planes.
Solution Approach 2:
The patent applies different calibration parameters and matrices to different regions (sub-images) of the projection image based on their respective planes. This local quality approach ensures that each plane receives the appropriate calibration treatment, enabling accurate display on one plane while preserving multi-plane projection capability.
2Ease of operation
If the projector is not arranged perpendicular to the wall facing the center of the projection screen, then the projector can be positioned flexibly, but the projection beam diffusion becomes uneven causing image deformation
Solution Approach 1:
The patent performs preliminary calibration by dividing the image into sub-images and applying appropriate calibration matrices before projection. This preliminary action compensates for the uneven beam diffusion caused by non-perpendicular positioning, allowing flexible projector placement while maintaining calibration accuracy.
Solution Approach 2:
The patent changes the calibration parameters (different calibration matrices for different sub-images) based on the projector's actual positioning and the characteristics of each projection plane. This parameter adjustment compensates for the deformation caused by non-ideal positioning, enabling both positioning flexibility and calibration accuracy.
Data Source
AI summary
The present disclosure discloses a projection method and an electronic device, belong to an image processing field. The method comprises: obtaining a first image, and obtaining an adjustment instruction, wherein the first image corresponds to first content; adjusting the first image to a second image according to the adjustment instruction, the second image comprising a target image corresponding to the first content; and projecting the second image; wherein when the second image is projected onto intersected planes formed by at least two planes, if an edge of the target image is intersected with an intersection line of the intersected planes, the edge of the target image is or is approximately perpendicular to the intersection line of the intersection planes. The present disclosure adjusts the first image to the second image, and projects the second image, so that when the second image projects onto the intersected planes formed by at least two planes, if the edge of the target image included in the second image is intersected with the intersection line of the intersected plane, the edge of the target image is or is approximately perpendicular to the intersection line of the intersection planes. Thus, the target image may be normally displayed and deformation may not occur.