GB2001503A - System for generating line drawing of a scanned picture - Google Patents

System for generating line drawing of a scanned picture

Info

Publication number
GB2001503A
GB2001503A GB787829213A GB7829213A GB2001503A GB 2001503 A GB2001503 A GB 2001503A GB 787829213 A GB787829213 A GB 787829213A GB 7829213 A GB7829213 A GB 7829213A GB 2001503 A GB2001503 A GB 2001503A
Authority
GB
United Kingdom
Prior art keywords
picture
scanned
generate
gray scale
samples
Prior art date
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.)
Granted
Application number
GB787829213A
Other versions
GB2001503B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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.)
Filing date
Publication date
Priority claimed from US05/813,561 external-priority patent/US4143401A/en
Priority claimed from US05/828,057 external-priority patent/US4258394A/en
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB2001503A publication Critical patent/GB2001503A/en
Application granted granted Critical
Publication of GB2001503B publication Critical patent/GB2001503B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T9/00—Image coding
    • G06T9/20—Contour coding, e.g. using detection of edges
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/10—Segmentation; Edge detection
    • G06T7/12—Edge-based segmentation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2200/00—Indexing scheme for image data processing or generation, in general
    • G06T2200/28—Indexing scheme for image data processing or generation, in general involving image processing hardware
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10016—Video; Image sequence

Abstract

A digital system detects edges in a full tone picture by scanning and reproduces them in solid lines of controllable width to provide an outline drawing of the picture. Each line of video information produced by scanning the picture is digitised by an A-D converter. Each digital sample is compared to a digital sample delayed by a predetermined amount to generate a difference signal which is indicative of a change in the gray scale in a direction perpendicular to the scanned lines. The digitised samples of the video signal are stored in shift registers having capacity sufficient to store data representing a plurality of scan lines. Selected digital samples from the stored data are compared to samples of the line being scanned to detect changes in the gray scale in a direction parallel to the scanned lines. These detected changes in the gray scale are combined to generate a signal which operates a printer to generate a line drawing of the scanned picture.
GB787829213A 1977-07-07 1978-07-07 System for generating line drawing of a scanned image Expired GB2001503B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/813,561 US4143401A (en) 1977-07-07 1977-07-07 System for generating line drawing of a scanned image
US05/828,057 US4258394A (en) 1977-08-26 1977-08-26 Digital circuit for accurately detecting changes in the gray scale of a scanned image

Publications (2)

Publication Number Publication Date
GB2001503A true GB2001503A (en) 1979-01-31
GB2001503B GB2001503B (en) 1982-01-27

Family

ID=27123758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB787829213A Expired GB2001503B (en) 1977-07-07 1978-07-07 System for generating line drawing of a scanned image

Country Status (8)

Country Link
JP (1) JPS5418245A (en)
BE (1) BE868835A (en)
DE (1) DE2830001A1 (en)
ES (1) ES471476A1 (en)
FR (1) FR2397023A1 (en)
GB (1) GB2001503B (en)
GR (1) GR64547B (en)
IL (1) IL54903A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021948A1 (en) * 1979-06-29 1981-01-07 ETAT FRANCAIS repr. par le Secrétaire d'Etat aux Postes & Télécommunications (Centre National d'Etudes des Télécommunications) Apparatus for following and recurringly estimating the local state of image contours and application to adaptive prediction for differential encoding of television signals
GB2281467A (en) * 1993-08-24 1995-03-01 Roger Colston Downs Image edge detractor and processor
GB2295741B (en) * 1993-08-24 1998-09-09 Downs Roger C Topography processor system
US6233361B1 (en) 1993-08-24 2001-05-15 Roger Colston Downs Topography processor system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5887666A (en) * 1981-11-19 1983-05-25 Matsushita Electric Ind Co Ltd Picture input device
EP0253560B1 (en) * 1986-07-08 1991-07-03 Mita Industrial Co. Ltd. An electrophotographic copying method and insulating paper for use therein

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021948A1 (en) * 1979-06-29 1981-01-07 ETAT FRANCAIS repr. par le Secrétaire d'Etat aux Postes & Télécommunications (Centre National d'Etudes des Télécommunications) Apparatus for following and recurringly estimating the local state of image contours and application to adaptive prediction for differential encoding of television signals
WO1981000180A1 (en) * 1979-06-29 1981-01-22 Telediffusion Fse Device for the estimation of image contours and application to the coding of television signals
FR2460580A1 (en) * 1979-06-29 1981-01-23 France Etat DEVICE FOR TRACKING AND ESTIMATING RECURSIVE LOCAL STATUS OF IMAGE CONTOURS AND APPLICATION TO ADAPTIVE PREDICTION IN DIFFERENTIAL CODING OF TELEVISION SIGNALS
US4363103A (en) * 1979-06-29 1982-12-07 L'etat Francais Represente Par Le Secretaire D'etat Aux Postes Et Telecommunications Et A La Telediffusion (Centre National D'etudes Des Telecommunications) Device for following and estimating the local state of picture contours
GB2281467A (en) * 1993-08-24 1995-03-01 Roger Colston Downs Image edge detractor and processor
GB2295741B (en) * 1993-08-24 1998-09-09 Downs Roger C Topography processor system
US6233361B1 (en) 1993-08-24 2001-05-15 Roger Colston Downs Topography processor system

Also Published As

Publication number Publication date
DE2830001A1 (en) 1979-01-25
FR2397023A1 (en) 1979-02-02
IL54903A (en) 1980-05-30
BE868835A (en) 1979-01-08
GB2001503B (en) 1982-01-27
JPS5418245A (en) 1979-02-10
ES471476A1 (en) 1979-10-01
GR64547B (en) 1980-04-12
IL54903A0 (en) 1978-08-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee