Title:
画像処理装置及び方法
Document Type and Number:
Japanese Patent JP3754734
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reproduce the edge part of a black image with high definition by providing an inking processing means, N-ary coding processing means and edge detecting means and generating black component data corresponding to the levels of plural color components by the inking processing means. SOLUTION: Color-processed Y4M4C4K4 binary image data are received from a host computer 100, and image data stored in an image data storage part 40 are color-converted to YMC binary image data for satisfactorily reproducing the edge part by a color converting part 50. Based on the feature that a K4 signal becomes '1' only in black picture elements at a color processing part, the color converting part 50 sharply reproduces the edge part of the black image by performing different types of mask processing to the K4 signals at the edge part of the black image and at any part excepting for the edge part. Namely, at a Bk converting part 52, Y5, M6 and C5 are provided from the respective colors of Y, M and C stored in a buffer 54 for mask storage. Then, at an edge extracting part 51, an edge area is extracted from the K signal.
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Inventors:
Daigoro Kanematsu
Naoji Otsuka
Kentaro Yano
Kiichiro Takahashi
Governor Iwasaki
Naoji Otsuka
Kentaro Yano
Kiichiro Takahashi
Governor Iwasaki
Application Number:
JP28042495A
Publication Date:
March 15, 2006
Filing Date:
October 27, 1995
Export Citation:
Assignee:
Canon Inc
International Classes:
H04N1/409; H04N1/60; G06T7/60; G06T9/20; H04N1/46
Domestic Patent References:
| JP1135268A | ||||
| JP6253136A | ||||
| JP4126461A | ||||
| JP4053354A | ||||
| JP6152945A |
Attorney, Agent or Firm:
Keizo Nishiyama
Yuichi Uchio
Yuichi Uchio