GB1297013A – – Google Patents
GB1297013A – – Google Patents
Info
Publication number
GB1297013A
GB1297013A
GB1297013DA
GB1297013A
GB 1297013 A
GB1297013 A
GB 1297013A
GB 1297013D A
GB1297013D A
GB 1297013DA
GB 1297013 A
GB1297013 A
GB 1297013A
Authority
GB
United Kingdom
Prior art keywords
reproduced
original
incremental area
density
recording
Prior art date
1969-03-03
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1969-03-03
Filing date
1970-01-28
Publication date
1972-11-22
1970-01-28
Application filed
filed
Critical
1972-11-22
Publication of GB1297013A
publication
Critical
patent/GB1297013A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
H04N1/024—Details of scanning heads ; Means for illuminating the original
H04N1/032—Details of scanning heads ; Means for illuminating the original for picture information reproduction
H04N1/034—Details of scanning heads ; Means for illuminating the original for picture information reproduction using ink, e.g. ink-jet heads
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
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
H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
H04N1/4078—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture using gradational references, e.g. grey-scale test pattern analysis
Abstract
1297013 Facsimile apparatus MEAD CORP 28 Jan 1970 [3 March 1969] 4190/70 Heading H4F The video signal derived by optically scanning an original is first converted into digital information representing each incremental area of the original according to its relative density, this information is then processed into a plurality of output code signals which define the relative density of each incremental area as the number of dots to be reproduced on a recording sheet. Intermediate magnetic recording is utilized. As described each reproduced incremental area is subdivided into nine (3 x 3) dot areas, and one line scan at the transmitter is reproduced at the receiver by three successive line scans, e.g. three rotations of a recording drum past an electrostatic ink spot recording device which is continuously or step-wise moved. The density (contrast) of the resulting half tone print may be adjusted during the digital signal processing step. The original may comprise a positive or negative film and may for example be one of a set of colour separations. Instead of a 3 x 3 format providing ten density values corresponding to how many of the nine possible points in the grid are blackened in print-out, other matrix formats are possible, e.g. 4 x 4, 4 x 5, 5 x 5. The recorded dots may overlap rather than be adjacent each other, and the images may be reconstructed repeatedly. Multicolour prints may also be produced by precise overprinting with different colours.
GB1297013D
1969-03-03
1970-01-28
Expired
GB1297013A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US80391069A
1969-03-03
1969-03-03
Publications (1)
Publication Number
Publication Date
GB1297013A
true
GB1297013A
(en)
1972-11-22
Family
ID=25187746
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1297013D
Expired
GB1297013A
(en)
1969-03-03
1970-01-28
Country Status (10)
Country
Link
US
(1)
US3604846A
(en)
JP
(1)
JPS4942171B1
(en)
BE
(1)
BE746666A
(en)
CH
(1)
CH525593A
(en)
DE
(1)
DE2009691C3
(en)
FR
(1)
FR2046143A5
(en)
GB
(1)
GB1297013A
(en)
HK
(1)
HK22277A
(en)
NL
(1)
NL174007C
(en)
SE
(1)
SE364157B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2851491A1
(en)
*
1977-11-28
1979-06-13
Mead Corp
DOT MATRIX COPY DEVICE
GB2140646A
(en)
*
1979-12-29
1984-11-28
Canon Kk
Image reproducing equipment
Families Citing this family (61)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2063669A5
(en)
*
1969-10-27
1971-07-09
Saint Gobain
US3819854A
(en)
*
1970-02-20
1974-06-25
Harris Intertype Corp
Composing apparatus
US4084183A
(en)
*
1970-03-18
1978-04-11
Dr. Ing. Rudolf Hell Gmbh.
Method for the electro-optical reproduction of half-tone pictures
DE2020639A1
(en)
*
1970-04-28
1971-11-18
Bosch Elektronik Gmbh
Method for the electrical transmission of original images
US3689693A
(en)
*
1970-11-17
1972-09-05
Mead Corp
Multiple head ink drop graphic generator
DE2262824C3
(en)
*
1972-12-22
1975-07-10
Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel
Process for the rasterized reproduction of colored halftone images in single or multi-color printing
US4044332A
(en)
*
1973-04-09
1977-08-23
Baird-Atomic, Inc.
Halftone display, particularly for a high resolution radioactivity distribution detection system
JPS566033B2
(en)
*
1973-07-25
1981-02-09
US3928718A
(en)
*
1973-05-09
1975-12-23
Hitachi Ltd
Image reproducing system
JPS552350B2
(en)
*
1973-05-09
1980-01-19
JPS5421095B2
(en)
*
1973-09-19
1979-07-27
US3846800A
(en)
*
1973-10-03
1974-11-05
Ibm
Ink jet recording method and apparatus
US4084259A
(en)
*
1973-11-30
1978-04-11
The Mead Corporation
Apparatus for dot matrix recording
DE2435090C2
(en)
*
1974-07-22
1982-06-03
Philips Patentverwaltung Gmbh, 2000 Hamburg
Method and arrangement for printing gray-tone images
JPS5156133A
(en)
*
1974-11-13
1976-05-17
Sony Corp
US4051536A
(en)
*
1975-03-14
1977-09-27
Xerox Corporation
Electronic halftone imaging system
US3977007A
(en)
*
1975-06-02
1976-08-24
Teletype Corporation
Gray tone generation
US4054928A
(en)
*
1976-02-20
1977-10-18
The Mead Corporation
Laser operated scanning and printing system
US4052715A
(en)
*
1976-02-25
1977-10-04
Xerox Corporation
Digital half-tone grey scale expansion system
US4151555A
(en)
*
1977-11-25
1979-04-24
The Mead Corporation
Optical scanning and encoding device
USRE30911E
(en)
*
1977-11-25
1982-04-20
The Mead Corporation
Optical scanning and encoding device
US4210936A
(en)
*
1977-12-27
1980-07-01
Pitney Bowes Inc.
Method and apparatus for reproducing an original gray scale image
US4219850A
(en)
*
1978-02-16
1980-08-26
The Mead Corporation
Optical encoder
US4198158A
(en)
*
1978-04-14
1980-04-15
Bell Telephone Laboratories, Incorporated
High resolution display
US4208666A
(en)
*
1978-10-23
1980-06-17
The Mead Corporation
Multiple copy ink jet printer
US4216480A
(en)
*
1978-11-13
1980-08-05
International Business Machines Corporation
Multiple speed ink jet printer
US4189754A
(en)
*
1978-11-24
1980-02-19
The Mead Corporation
Gray tone reproduction apparatus
JPS5935354B2
(en)
*
1979-03-19
1984-08-28
株式会社リコー
Inkjet recording method
JPS55146582A
(en)
*
1979-04-27
1980-11-14
Matsushita Electric Ind Co Ltd
Image recording method
US4275450A
(en)
*
1979-08-01
1981-06-23
Xerox Corporation
Magnification/demagnification apparatus and method
US4278999A
(en)
*
1979-09-12
1981-07-14
The Mead Corporation
Moving image scanner
DE2943018C3
(en)
*
1979-10-24
1982-05-13
Siemens AG, 1000 Berlin und 8000 München
Method and arrangement for displaying a halftone image
FR2469841A1
(en)
*
1979-11-09
1981-05-22
Thomson Csf
COLOR RETURN DEVICE USING A THERMAL PRINT HEAD AND THERMAL PRINT SYSTEM COMPRISING SUCH A DEVICE
US4246614A
(en)
*
1979-12-26
1981-01-20
Xerox Corporation
Binary graphic printer system having an electronic screen with shift control suited for rescreening
US4439789A
(en)
*
1980-04-11
1984-03-27
Coulter Systems Corporation
Binary scan system
US4408868A
(en)
*
1980-04-11
1983-10-11
Coulter Systems Corporation
Digital plate maker system and method
DE3037774C2
(en)
*
1980-10-06
1982-06-16
Siemens AG, 1000 Berlin und 8000 München
Method and arrangement for displaying multicolored halftone images
JPS57129751A
(en)
*
1981-02-06
1982-08-11
Fuji Photo Film Co Ltd
Arranging method for heads of ink-jet printer
US4463374A
(en)
*
1981-11-20
1984-07-31
Trilog, Inc.
Color plotter interface and control circuit
JPS60100176A
(en)
*
1983-11-05
1985-06-04
株式会社リコー
Character font reduction system
JPS60101057A
(en)
*
1983-11-09
1985-06-05
Ricoh Co Ltd
Charge controlled ink jet tone recording method
US4703318A
(en)
*
1984-03-30
1987-10-27
Wang Laboratories, Inc.
Character-based monochromatic representation of color images
US4688031A
(en)
*
1984-03-30
1987-08-18
Wang Laboratories, Inc.
Monochromatic representation of color images
US4651287A
(en)
*
1984-06-14
1987-03-17
Tsao Sherman H
Digital image processing algorithm for output devices with discrete halftone gray scale capability
US4611349A
(en)
*
1984-08-13
1986-09-09
Xerox Corporation
Halftone image scaling
US4677571A
(en)
*
1985-02-08
1987-06-30
Rise Technology Inc.
Electronic publishing
US4638373A
(en)
*
1985-03-06
1987-01-20
Metromedia, Inc.
Method and apparatus for improving gray scale resolution in an ink jet printing system
US4636807A
(en)
*
1986-03-14
1987-01-13
The Mead Corporation
Apparatus and method for light value gray scale recording
USH996H
(en)
1987-01-20
1991-11-05
Recognition Equipment Incorporated
High resolution page image display system
EP0303960B1
(en)
*
1987-08-20
1992-04-15
Dainippon Screen Mfg. Co., Ltd.
Method of and apparatus for setting original in image scanner
US4821111A
(en)
*
1988-01-22
1989-04-11
Alden Research Foundation
Method of recording facsimile signals
US5221971A
(en)
*
1990-11-21
1993-06-22
Polaroid Corporation
Area modulation printing apparatus
JP2718570B2
(en)
*
1990-11-21
1998-02-25
スターリング ドライ イメイジング，インコーポレイテッド
Printing equipment
IL98560A
(en)
*
1991-06-19
1993-01-31
Nur Ind 1987 Ltd
Apparatus and process for printing large graphics
IL99896A
(en)
*
1991-10-29
1996-03-31
Nur Advanced Tech Ltd
Printing method and apparatu
US6116728A
(en)
*
1992-02-26
2000-09-12
Canon Kabushiki Kaisha
Ink jet recording method and apparatus and recorded matter
CN1096943C
(en)
1992-02-26
2002-12-25
佳能株式会社
Ink jet record method and recorded material thereof
JP3299840B2
(en)
*
1994-04-20
2002-07-08
キヤノン株式会社
Ink jet recording method, recording apparatus, and information processing system
US5875038A
(en)
*
1996-05-28
1999-02-23
Gerber Scientific, Inc.
Facsimile queuing and transmission system
US5868075A
(en)
*
1997-02-26
1999-02-09
Presstek, Inc.
Method and apparatus for imaging a seamless print medium
JP3507415B2
(en)
*
2000-07-17
2004-03-15
キヤノン株式会社
Recording device and recording method
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1029815A
(en)
*
1962-08-29
1966-05-18
Nat Res Dev
Improvements in television and like data transmission systems
GB1095452A
(en)
*
1963-12-27
1900-01-01
US3474192A
(en)
*
1966-11-09
1969-10-21
Webb James E
Video communication system and apparatus
1969
1969-03-03
US
US803910A
patent/US3604846A/en
not_active
Expired – Lifetime
1970
1970-01-28
GB
GB1297013D
patent/GB1297013A/en
not_active
Expired
1970-02-27
NL
NLAANVRAGE7002792,A
patent/NL174007C/en
not_active
IP Right Cessation
1970-02-27
BE
BE746666D
patent/BE746666A/en
not_active
IP Right Cessation
1970-03-02
DE
DE2009691A
patent/DE2009691C3/en
not_active
Expired
1970-03-02
SE
SE02675/70A
patent/SE364157B/xx
unknown
1970-03-02
FR
FR7007440A
patent/FR2046143A5/fr
not_active
Expired
1970-03-03
CH
CH308670A
patent/CH525593A/en
not_active
IP Right Cessation
1970-03-03
JP
JP45017719A
patent/JPS4942171B1/ja
active
Pending
1977
1977-05-12
HK
HK222/77A
patent/HK22277A/en
unknown
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2851491A1
(en)
*
1977-11-28
1979-06-13
Mead Corp
DOT MATRIX COPY DEVICE
GB2140646A
(en)
*
1979-12-29
1984-11-28
Canon Kk
Image reproducing equipment
Also Published As
Publication number
Publication date
HK22277A
(en)
1977-05-20
DE2009691A1
(en)
1970-09-17
CH525593A
(en)
1972-07-15
NL7002792A
(en)
1970-09-07
JPS4942171B1
(en)
1974-11-13
NL174007C
(en)
1984-04-02
NL174007B
(en)
1983-11-01
DE2009691C3
(en)
1979-11-22
FR2046143A5
(en)
1971-03-05
SE364157B
(en)
1974-02-11
US3604846A
(en)
1971-09-14
DE2009691B2
(en)
1976-07-15
BE746666A
(en)
1970-07-31
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Legal Events
Date
Code
Title
Description
1973-04-04
PS
Patent sealed [section 19, patents act 1949]
1989-03-22
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1989-09-20
PCNP
Patent ceased through non-payment of renewal fee
