The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Nov. 30, 1995
Hiroyuki Bonde, Yokohama, JP;
Toyotaka Machida, Kashiwa, JP;
Abstract
The present invention provides an image processing apparatus for use with an image projector to allow the image projector to project a magnified image on a screen without a trapezoid distortion or a keystone distortion even when a normal line of the screen is declined to an optical axis of a projector lens of the projector. Digital image data from AD converter are stored in the image memory (6-9) through a selector (3). From the image memory, the image data of four pixels nearby a deformed coordinate position are read out through a selector (4). The image data of the deformed coordinate position is obtained by calculating an average of sum of arithmetic results obtained by giving a weight to each of image data of the four pixels. The weight given corresponds to a positional deviation value from the deformed coordinate position to the respective coordinate positions of the four pixels nearby the deformed coordinate position.