GB2001503A - System for generating line drawing of a scanned picture - Google Patents
System for generating line drawing of a scanned pictureInfo
- 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
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.
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)
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)
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 |
-
1978
- 1978-06-13 IL IL54903A patent/IL54903A/en unknown
- 1978-06-24 GR GR56588A patent/GR64547B/en unknown
- 1978-07-05 FR FR7820049A patent/FR2397023A1/fr not_active Withdrawn
- 1978-07-05 ES ES471476A patent/ES471476A1/en not_active Expired
- 1978-07-07 BE BE189151A patent/BE868835A/en not_active IP Right Cessation
- 1978-07-07 GB GB787829213A patent/GB2001503B/en not_active Expired
- 1978-07-07 DE DE19782830001 patent/DE2830001A1/en not_active Withdrawn
- 1978-07-07 JP JP8216878A patent/JPS5418245A/en active Pending
Cited By (7)
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 |
---|---|
GR64547B (en) | 1980-04-12 |
GB2001503B (en) | 1982-01-27 |
ES471476A1 (en) | 1979-10-01 |
JPS5418245A (en) | 1979-02-10 |
DE2830001A1 (en) | 1979-01-25 |
IL54903A0 (en) | 1978-08-31 |
FR2397023A1 (en) | 1979-02-02 |
BE868835A (en) | 1979-01-08 |
IL54903A (en) | 1980-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |