KR900017371A - 디더(dither) 처리방법 - Google Patents
디더(dither) 처리방법 Download PDFInfo
- Publication number
- KR900017371A KR900017371A KR1019900005781A KR900005781A KR900017371A KR 900017371 A KR900017371 A KR 900017371A KR 1019900005781 A KR1019900005781 A KR 1019900005781A KR 900005781 A KR900005781 A KR 900005781A KR 900017371 A KR900017371 A KR 900017371A
- Authority
- KR
- South Korea
- Prior art keywords
- dither
- cell
- processing method
- macro
- random number
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
- H04N1/4058—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern with details for producing a halftone screen at an oblique angle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size
- H04N1/4052—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size by error diffusion, i.e. transferring the binarising error to neighbouring dot decisions
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 제1실시예의 매크로디더셀을 나타내는 개념도.
제13도는 매크로디더셀을 처리대상화상에 적용한 제2실시예의 개념도.
제20도는 제3실시예의 블록도.
Claims (10)
- 비장형방의 디더셀(D1)-(D4)및 전기한 디더셀을 소정형태로 복수 인접 배열하여 이루어지는 매크로디더셀(MD)을 정의하고, 전기한 디더셀내의 각 화소의 한계치 순의를 정의하며, 전기한 매크로디더셀내의 한계치 순의를 정의하고, 전기한 매크로디더셀내의 디더셀및 디더셀내의 한계치 순위에 따라서 매크로디더셀내의 각 디더셀의 각 화소의 한계치를 정의하는 단계로 이루어진 것을 특징으로 하는 디더처리방법.
- 제1항에 있어서, 전기한 매크로디더셀(MD)은 대략 정육각 형상인 것을 특징으로 하는 디더처리방법.
- 제2항에 있어서, 전기한 디더셀은 8화소로 구성되어 있는 것을 특징으로 하는 디더처리방법.
- 제2항에 있어서, 전기한 매크로디더셀은 전기한 하나의 디더셀의 중심으로 부터 다른 디더셀의 중심까지 거리가 최소로 되도록 디더셀을 4개 배열하여 이루어진 것을 특징으로 하는 디더처리방법.
- 제1항 내지 제4항에 있어서, 전기한 매크로디더셀내의 디더셀의 한계치순위는 난수 계열에 기초하여 정의되는 것을 특징으로 하는 디더처리방법.
- 제5항에 있어서, 전기한 난수 계열은 랜덤성이 높은 화소패턴의 실제화상에 기초하여 생성되는 것을 특징으로 하는 디더처리방법.
- 제5항에 있어서, 전기한 난수계열은 전기한 매크로디더셀내의 각 난수의 출현확률이 거의 균일하도록 정의되는 것을 특징으로 하는 디더처리방법.
- 제7항에 있어서, 전기한 난수계열은 난수계열에 기초하여 복수의 난수계열로부터 선택되는 것을 특징으로 하는 디더처리방법.
- 처리대상화소의 근방의 2치화화소의 2치화오차를 가중치에 의해 가중하고, 2치화되는 농도를 부가하여, 전기한 2치화되는 농도를 한계치처리하는 디더처리방법에 있어서, 전기한 가중치는 전기한 처리대상화소의 농도에 따라 변화되는 것을 특징으로 하는 디더처리방법.
- 원화상을 조직디더에 의해 2치화하여 디더화상을 생성하는 단계와, 디더셀에 대응하는 디더화상내의 각 영역에 대해 대표농도를 계산하는 단계와, 디더화상의 대표농도의 중앙값을 계산하는 단계와, 중앙값의 한계치에 의해 원화상을 2치화하는 단계로 구성되어 있는 것을 특징으로 하는 디더처리방법.※참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1103695A JP2928786B2 (ja) | 1989-04-24 | 1989-04-24 | 中間調画像の表現方法 |
JP???1-?103695? | 1989-04-24 | ||
JP1-103695 | 1989-04-24 | ||
JP???1-?147229? | 1989-06-09 | ||
JP1147229A JP2729278B2 (ja) | 1989-06-09 | 1989-06-09 | 画像の2値化表現方法 |
JP1-147229 | 1989-06-09 | ||
JP1-157164 | 1989-06-20 | ||
JP1157164A JP2729279B2 (ja) | 1989-06-20 | 1989-06-20 | 画像の閾値処理方法 |
JP???1-?157164? | 1989-06-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR900017371A true KR900017371A (ko) | 1990-11-16 |
KR0173456B1 KR0173456B1 (ko) | 1999-03-20 |
Family
ID=27310049
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019900005781A KR0173456B1 (ko) | 1989-04-24 | 1990-04-24 | 디더 처리방법 |
Country Status (4)
Country | Link |
---|---|
US (3) | US5201013A (ko) |
EP (1) | EP0394929B1 (ko) |
KR (1) | KR0173456B1 (ko) |
DE (1) | DE69022469T2 (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100859507B1 (ko) * | 2001-12-05 | 2008-09-22 | 삼성전자주식회사 | 디더링 장치 및 디더링 방법 |
Families Citing this family (41)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5341228A (en) | 1990-12-04 | 1994-08-23 | Research Corporation Technologies | Method and apparatus for halftone rendering of a gray scale image using a blue noise mask |
US5799111A (en) * | 1991-06-14 | 1998-08-25 | D.V.P. Technologies, Ltd. | Apparatus and methods for smoothing images |
US5442462A (en) * | 1992-06-10 | 1995-08-15 | D.V.P. Technologies Ltd. | Apparatus and method for smoothing images |
US5898796A (en) * | 1992-07-21 | 1999-04-27 | Minolta Co., Ltd. | Method of processing image having value of error data controlled based on image characteristic in region to which pixel belongs |
US5365251A (en) * | 1992-08-28 | 1994-11-15 | Xerox Corporation | Image quality improvement by hierarchical pattern matching with variable size templates |
US5495345A (en) * | 1992-10-15 | 1996-02-27 | Digital Equipment Corporation | Imaging system with two level dithering using comparator |
JPH0738767A (ja) * | 1993-07-19 | 1995-02-07 | Canon Inc | 画像2値化処理装置 |
US5521989A (en) * | 1993-08-05 | 1996-05-28 | Xerox Corporation | Balanced error diffusion system |
US5621542A (en) * | 1994-01-20 | 1997-04-15 | Canon Kabushiki Kaisha | Image processing apparatus and method with weighting of error data generated in quantization |
US5463703A (en) * | 1994-02-10 | 1995-10-31 | Lin; Bob | Dither picture data pre-compression processing method |
US5499305A (en) * | 1994-03-30 | 1996-03-12 | Lasermaster Corporation | Method and apparatus for coalescing a grayscale image and rendering the coalesced grayscale image as a binary image |
JPH07307866A (ja) * | 1994-05-10 | 1995-11-21 | Fuji Photo Film Co Ltd | 画像信号2値化処理装置および方法 |
US5557709A (en) * | 1994-07-01 | 1996-09-17 | Seiko Epson Corporation | Method and apparatus for dither array generation to reduce artifacts in halftoned images |
US5684932A (en) * | 1994-07-01 | 1997-11-04 | Seiko Epson Corporation | Method and apparatus for dither array generation to reduce artifacts in halftoned image data utilizing ink reduction processing |
DE69519032T2 (de) * | 1994-07-29 | 2001-05-17 | Harlequin Ltd., Barrington | Bildwiedergabe unter benutzung von gleichmässig verteilten intensitätsgruppen |
US5579457A (en) * | 1994-07-29 | 1996-11-26 | The Harlequin Group Ltd. | Image display apparatus and method using irregularly placed curving structures |
US5636294A (en) * | 1994-08-09 | 1997-06-03 | Unisys Corporation | Method and apparatus for truncation of images during data compression |
US5517584A (en) * | 1994-08-09 | 1996-05-14 | Unisys Corporation | Method and apparatus for high-speed implementation of scaling, dithering, and data remapping operations with a single processor |
JP3381755B2 (ja) * | 1994-10-11 | 2003-03-04 | セイコーエプソン株式会社 | 画像の粒状性を減らすための改良された適応性のあるフィルタリングおよび閾値設定の方法及び装置 |
US5870503A (en) * | 1994-10-20 | 1999-02-09 | Minolta Co., Ltd. | Image processing apparatus using error diffusion technique |
US5534945A (en) * | 1994-12-16 | 1996-07-09 | International Business Machines Corporation | System and method for providing black diffusion in video image processing |
JPH08265568A (ja) * | 1995-03-20 | 1996-10-11 | Hitachi Ltd | デジタル階調処理装置およびデジタル階調処理方法 |
US5710828A (en) * | 1995-03-30 | 1998-01-20 | Fuji Photo Film Co., Ltd. | Method and apparatus for converting a threshold matrix which is then used to binarize image signals |
AUPN743096A0 (en) * | 1996-01-05 | 1996-02-01 | Canon Kabushiki Kaisha | Force field halftoning |
US5625756A (en) * | 1996-04-23 | 1997-04-29 | Hewlett-Packard Company | Efficient use of dither matrix based gray level patterns |
JP3387738B2 (ja) * | 1996-06-28 | 2003-03-17 | 株式会社沖データ | 画像パターン変換装置 |
US6028677A (en) * | 1997-09-16 | 2000-02-22 | Hewlett-Packard Co. | Method and apparatus for converting a gray level pixel image to a binary level pixel image |
JP3974714B2 (ja) * | 1997-10-17 | 2007-09-12 | 東芝テック株式会社 | 画像処理方法 |
JP2001157056A (ja) * | 1999-11-30 | 2001-06-08 | Fujitsu Ltd | ハーフトーン化方法およびハーフトーン化装置並びにハーフトーン化プログラムを記録したコンピュータ読み取り可能な記録媒体 |
US6804373B1 (en) * | 2000-06-15 | 2004-10-12 | International Business Machines Corporation | Method and system using renormalized pixels for public key and compressed images watermarks on prints |
US7081972B2 (en) * | 2000-09-20 | 2006-07-25 | Canon Kabushiki Kaisha | Image processing apparatus and image processing method |
JP4047119B2 (ja) * | 2002-09-20 | 2008-02-13 | キヤノン株式会社 | 画像処理装置及び画像処理方法 |
US7330191B2 (en) * | 2005-01-19 | 2008-02-12 | Seiko Epson Corporation | System for secure text display |
US7483587B2 (en) * | 2005-04-29 | 2009-01-27 | Texas Instruments Incorporated | Iterative filtering for dithered imaging |
JP4412248B2 (ja) * | 2005-07-05 | 2010-02-10 | セイコーエプソン株式会社 | 画像処理装置、画像処理方法、及び画像処理プログラム |
JP4238902B2 (ja) * | 2006-09-04 | 2009-03-18 | 日本電気株式会社 | 文字ノイズ除去装置、文字ノイズ除去方法、文字ノイズ除去プログラム |
KR100791389B1 (ko) * | 2006-12-26 | 2008-01-07 | 삼성전자주식회사 | 스트럭쳐드 라이트를 이용한 거리 측정 장치 및 방법 |
JP5472617B2 (ja) * | 2010-02-09 | 2014-04-16 | 富士ゼロックス株式会社 | 画像処理装置、画像形成装置、画像処理プログラム |
JP5573451B2 (ja) * | 2010-07-21 | 2014-08-20 | コニカミノルタ株式会社 | 画像処理装置及び画像処理方法 |
US9168757B2 (en) * | 2013-08-22 | 2015-10-27 | Canon Kabushiki Kaisha | Image processing apparatus and image processing method |
US9906686B2 (en) | 2013-10-15 | 2018-02-27 | Hewlett-Packard Development Company, L.P. | Image processing using content-based weighted dithering |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3067060D1 (en) * | 1979-12-20 | 1984-04-19 | Cambridge Consultants | Apparatus and method for generating a dispersed dot half tone picture from a continuous tone picture |
US4449150A (en) * | 1981-01-19 | 1984-05-15 | Ricoh Company, Ltd. | Method of processing medium tone picture |
DE3312273C3 (de) * | 1982-04-06 | 1996-03-21 | Canon Kk | Bildverarbeitungsgerät |
JPS58202666A (ja) * | 1982-05-21 | 1983-11-25 | Ricoh Co Ltd | 2値化方式 |
JPS59163959A (ja) * | 1983-03-08 | 1984-09-17 | Fujitsu Ltd | 中間調画像変換方式 |
US4545024A (en) * | 1983-04-27 | 1985-10-01 | At&T Bell Laboratories | Hybrid natural random number generator |
JPH0691604B2 (ja) * | 1983-09-02 | 1994-11-14 | 株式会社リコー | 階調情報変倍処理方法 |
ATE29815T1 (de) * | 1983-11-14 | 1987-10-15 | Hell Rudolf Dr Ing Gmbh | Verfahren und einrichtung zur herstellung gerasterter druckformen. |
US4783838A (en) * | 1984-12-26 | 1988-11-08 | Konishiroku Photo Industry Co., Ltd. | Image processing method and apparatus therefor |
US4654721A (en) * | 1985-04-12 | 1987-03-31 | International Business Machines Corporation | System for reproducing multi-level digital images on a bi-level printer of fixed dot size |
US4758897A (en) * | 1985-04-30 | 1988-07-19 | Konishiroku Photo Industry Co., Ltd. | Method and apparatus for estimating halftone image from binary image |
NL8501956A (nl) * | 1985-07-09 | 1987-02-02 | Philips Nv | Beeldherstelschakeling. |
JPH0777418B2 (ja) * | 1986-03-17 | 1995-08-16 | 株式会社東芝 | 画像処理装置 |
EP0507356B1 (en) * | 1986-12-19 | 1997-02-26 | Matsushita Electric Industrial Co., Ltd. | Bi-level image display signal processing apparatus |
US4878125A (en) * | 1987-01-08 | 1989-10-31 | Canon Kabushiki Kaisha | Method and apparatus for image processing with fed-back error correction |
US4955065A (en) * | 1987-03-17 | 1990-09-04 | Digital Equipment Corporation | System for producing dithered images from continuous-tone image data |
US4975786A (en) * | 1987-12-28 | 1990-12-04 | Canon Kabushiki Kaisha | Image processing method and apparatus with error diffusion capability |
US4924322A (en) * | 1988-03-18 | 1990-05-08 | Matsushita Electric Industrial Co., Ltd. | Bi-level image display signal processing apparatus |
US4891714A (en) * | 1989-04-24 | 1990-01-02 | Eastman Kodak Company | Apparatus for non-linear error diffusion thresholding of multilevel video images |
US5150428A (en) * | 1991-04-01 | 1992-09-22 | Eastman Kodak Company | Method for generating halftone image data with randomly selected threshold array |
-
1990
- 1990-04-20 US US07/512,258 patent/US5201013A/en not_active Expired - Lifetime
- 1990-04-23 EP EP90107677A patent/EP0394929B1/en not_active Expired - Lifetime
- 1990-04-23 DE DE69022469T patent/DE69022469T2/de not_active Expired - Lifetime
- 1990-04-24 KR KR1019900005781A patent/KR0173456B1/ko not_active IP Right Cessation
-
1992
- 1992-05-08 US US07/881,730 patent/US5315669A/en not_active Expired - Lifetime
-
1994
- 1994-05-23 US US08/247,397 patent/US5438634A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100859507B1 (ko) * | 2001-12-05 | 2008-09-22 | 삼성전자주식회사 | 디더링 장치 및 디더링 방법 |
Also Published As
Publication number | Publication date |
---|---|
US5438634A (en) | 1995-08-01 |
EP0394929A3 (en) | 1991-09-25 |
DE69022469D1 (de) | 1995-10-26 |
US5315669A (en) | 1994-05-24 |
DE69022469T2 (de) | 1996-03-14 |
KR0173456B1 (ko) | 1999-03-20 |
EP0394929A2 (en) | 1990-10-31 |
EP0394929B1 (en) | 1995-09-20 |
US5201013A (en) | 1993-04-06 |
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