Correction method
By integrating depth information from a distance sensor with a gravity vector from an acceleration sensor to calculate a second normal vector, the method corrects projector images more accurately, addressing the limitations of sensor precision in determining surface normals.
JP2025180536APending Publication Date: 2025-12-11SEIKO EPSON CORP
Patent Information
- Application Number
- JP2024087939
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-12-11
AI Technical Summary
Technical Problem
The accuracy of image correction in projectors relying solely on distance sensor measurements is limited by the sensor's precision, leading to inaccuracies in determining the normal vector of the projection surface.
Method used
A method that combines depth information from a distance sensor with a gravity vector derived from an acceleration sensor to calculate a second normal vector, which is used to correct the projected image, ensuring greater accuracy by orthogonalizing the vectors and compensating for measurement errors.
Benefits of technology
This approach enhances the accuracy of image correction by aligning the projected image more precisely with the actual surface normal, improving the alignment and shape of the projected image on various surfaces.
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Smart Images
Figure 2025180536000001_ABST
Abstract
To enhance the accuracy of correction when a projector corrects a projection image.SOLUTION: A method for correcting a projection image PI projected from a projector 1 onto a projection surface PP includes: acquiring depth information indicating a plurality of distances from a distance sensor 15 to a plurality of positions on the projection surface PP on the basis of an output from the distance sensor 15; calculating a position of a plane on the basis of the depth information; calculating a first normal vector n for the plane; calculating a gravity vector g on the basis of an output from an acceleration sensor associated with a coordinate system of the projector 1; generating a second normal vector nng by converting the first normal vector n such that an inner product of the gravity vector g and the first normal vector n is a cosine of an angle between a horizontal plane and the projection surface PP; and correcting the projection image PI on the basis of the second normal vector nng.SELECTED DRAWING: Figure 1
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Citation Information
Patent Citations
Projector correction method and system, and storage medium and electronic device
WO2022193560A1