Projection system with corrective image transformation
An image projection system that corrects an image to be projected onto a projection surface by sensing at least a portion of that surface, and based upon the sensed portion, determining and applying a corrective transformation to the image, after which the corrected image is projected onto the projection surface.
1. A method for keystoning in a projector, comprising:
(a) projecting an image from a lens of said projector;
(b) using an imaging device to sense said image projected by said projector;
(c) determining a transformation to adjust the keystoning of an image projected from said projector;
(d) modifying said image projected from said projector based upon said transformation;
(e) projecting said modified image from said projector, wherein said imaging device and said projector are within 5 inches of each other.
2. The method of claim 1 wherein said imaging device and said lens are maintained in a fixed relationship with respect to each other.
3. The method of claim 1 wherein said imaging device is integral with said projector.
4. The method of claim 1 wherein said imaging device and said lens are within 3 inches of each other.