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:
Nov. 03, 1992
Filed:
Oct. 31, 1990
Kiyoji Muramatsu, Nagoya, JP;
Abstract
A digital image processing device for enlarging an original image with high fidelity. To produce digital data representative of an enlarged image based on digital data representative of an original image, 2-by-2 enlarged image data is firstly produced, for example, through computation of approximate surface representative of density distribution of the original image approximate to a surface covering all density values. Based on the 2-by-2 enlarged image data, another approximate surface covering all density values of control points selected from the pixels constituting the 2-by-2 enlarged image. Then, a center portion of the thus obtained approximate surface is enlarged to a desired size and four center portions of such enlarged approximate surface are obtained while selecting the control points on one pixel shifted positions in row and column on the 2-by-2 enlarged data. The thus obtained four center portions are averaged, which gives the image data representative of the enlarged image.