Method and device for calibrating project image from computer

Application Number: 00104940
Application Date: 2000.03.30
Publication Number: 1270352
Publication Date: 2000.10.18
Priority Information: 1999/3/31 US 09/283093
International: G06F11/28
Applicant(s) Name: Seiko Epson Corp.
Inventor(s) Name: Fu Akira;Haya Shoko
Patent Agency Code: 72001
Patent Agent: wu zengyong
Abstract An apparatus and method for calibrating a computer-generated projected image to the displayed image viewed on the computer screen. Four or more calibration spots, at least three of which are collinear, arrayed in a predetermined pattern in both the displayed and the projected images, are optically imaged and electronically discriminated in the projected image, their coordinates ascertained and related to the predetermined pattern so as to derive transformation coefficients used in the process of converting a location on the projected image to the corresponding location in the displayed image.