United States Patent m
Sekine
[54] HMAGE PROCESSING APPARATUS
[75] Inventor: Hiroshi Sekine, Kanagawa, Japan [73] Assignee: Fuji Xerox Co., Ltd., Tokyo, Japan
[21] Appl. No.: 499,389
[22] Filed: Jul. 6,1995
[30] Foreign Application Priority Data
M. 7,1994 [JP] Japan 6-156146
[51] Int CI.6 H04N 1/40; H04N 1/46
[52] U.S. CI 382/266; 382/269; 382/199;
382/205; 358/462; 358/532; 358/457
[58] Field of Search 358/532, 462,
358/453, 450, 455, 466, 447, 540, 296, 298, 535, 457, 458, 467, 538; 395/109; 347/131; 382/266, 269, 199, 205
[56] References Cited
U.S. PATENT DOCUMENTS
4,437,122 3/1984 Walsh et al 358/447
4,847,641 7/1989 Tung 347/131
4,992,955 2/1991 Yabuuchi et al 358/465
5,029,108 7/1991 Lung .
5,109,283 4/1992 Cariey 358/298
5,257,116 10/1993 Suzuki 358/447
[ii] Patent Number: 5,719,967 [45] Date of Patent: Feb. 17, 1998
5,283,664 2/1994 Fujisawaetal 358/429
5,363,210 11/1994 Sasaki etal 382/266
5,453,848 9/1995 Park et al 358/462
5,455,681 10/1995 Ng 358/462
5,467,196 11/1995 Fukushima et al 358/462
5,491,564 2/1996 Hongu 358/462
5,521,721 5/1996 Van Gennip 358/462
FOREIGN PATENT DOCUMENTS
2-62260 3/1990 Japan.
Primary Examiner—Edward L. Coles, Sr.
Assistant Examiner—Fan Lee
Attorney, Agent, or Firm—Finnegan, Henderson, Farabow,
Garrett & Dunner, L.L.P.
[57] ABSTRACT
An image processing apparatus capable of generating multivalue image data to be reproduced by a laser printer and the like as a hard copy having high visual quality. A first character/line drawing data is separated from an input multivalue image data to be subjected to an image data processing for removing jaggies appearing in curved or straight lines of characters and lines, and then is synthesized with a patter data having data indicative of edge directions to generate an output multivalue image data, so as to provide the hard copy having high visual quality.
8 Claims, 16 Drawing Sheets
