ALEXANDRIA, Va., April 15 -- United States Patent no. 12,603,977, issued on April 14, was assigned to SEIKO EPSON Corp. (Tokyo).

"Projection image correction method using changing position of control point and projection system" was invented by Masaaki Endo (Beppu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "When a camera detects light which satisfies a first condition and with which a projection surface is irradiated by a pointing apparatus in captured images formed by capturing the projection surface, the camera selects at least one of a plurality of control points as a control point in a selected state based on the position of the light which satisfies the first condition in the captured images, ...