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:
Mar. 24, 1998
Filed:
Apr. 16, 1997
Masanobu Fukushima, Sanda, JP;
Tatsuya Fujii, Nishinomiya, JP;
Naoto Shiraishi, Toyonaka, JP;
Yasuhiro Izawa, Sanda, JP;
Tatsuya Nakajima, Toyonaka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A method for coordinate transformation is presented to perform world coordinate transformation for placing a 3D model in world coordinates and to perform view transformation for spatially relating the 3D model with a viewpoint. The method includes the steps of performing a contraction process on the 3D model at a time of the world coordinate transformation, so that a size of the 3D model is made smaller than an actual size thereof, and performing a viewpoint position transformation on the viewpoint at a time of the view transformation, so that shift of the viewpoint is made smaller than an actual shift in accordance with a degree of contraction of the contraction process.