JPS57211867A - Magnification varying method for picture - Google Patents
Magnification varying method for pictureInfo
- Publication number
- JPS57211867A JPS57211867A JP56096333A JP9633381A JPS57211867A JP S57211867 A JPS57211867 A JP S57211867A JP 56096333 A JP56096333 A JP 56096333A JP 9633381 A JP9633381 A JP 9633381A JP S57211867 A JPS57211867 A JP S57211867A
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- data
- picture
- density
- marking
- 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.)
- Pending
Links
- 239000011159 matrix material Substances 0.000 abstract 2
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
- H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
- H04N1/393—Enlarging or reducing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Editing Of Facsimile Originals (AREA)
- Image Processing (AREA)
Abstract
PURPOSE:To obtain a variable magnification of picture of fine quality with an economical device configuration by determining the density of an optional marking picture element of the picture to be changed its magnification in accordance with a black or white picture element corresponding to the marking picture element in a reference picture element group. CONSTITUTION:Picture density data including a reference picture element group for a marking picture element which are stored in a line are successively transferred from a line buffer to a matrix register. The density data of nXn bits stored in the matrix register are inputted to a converting circuit. the converting circuit outputs data corresponding to 1 bit (black picture element) included in the input density data of nXn bits and the outputted data are compared with a binary threshold by a comparator and converted into a binary data. An output gate circuit gates the output data of the comparator and selects only an available data to output it to the external.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56096333A JPS57211867A (en) | 1981-06-22 | 1981-06-22 | Magnification varying method for picture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56096333A JPS57211867A (en) | 1981-06-22 | 1981-06-22 | Magnification varying method for picture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57211867A true JPS57211867A (en) | 1982-12-25 |
Family
ID=14162081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56096333A Pending JPS57211867A (en) | 1981-06-22 | 1981-06-22 | Magnification varying method for picture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57211867A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59134985A (en) * | 1983-01-24 | 1984-08-02 | Canon Inc | Picture forming device |
| JPS61295593A (en) * | 1985-06-25 | 1986-12-26 | 株式会社 写研 | Pixel compression converting system for image data |
| JPS6382581A (en) * | 1986-09-26 | 1988-04-13 | Konica Corp | Method and device for processing binary image signal |
| JPH0311880A (en) * | 1989-06-09 | 1991-01-21 | Canon Inc | Picture element density converter |
-
1981
- 1981-06-22 JP JP56096333A patent/JPS57211867A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59134985A (en) * | 1983-01-24 | 1984-08-02 | Canon Inc | Picture forming device |
| JPS61295593A (en) * | 1985-06-25 | 1986-12-26 | 株式会社 写研 | Pixel compression converting system for image data |
| JPS6382581A (en) * | 1986-09-26 | 1988-04-13 | Konica Corp | Method and device for processing binary image signal |
| JPH0311880A (en) * | 1989-06-09 | 1991-01-21 | Canon Inc | Picture element density converter |
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