JPS55161467A - Picture processing method - Google Patents
Picture processing methodInfo
- Publication number
- JPS55161467A JPS55161467A JP6904179A JP6904179A JPS55161467A JP S55161467 A JPS55161467 A JP S55161467A JP 6904179 A JP6904179 A JP 6904179A JP 6904179 A JP6904179 A JP 6904179A JP S55161467 A JPS55161467 A JP S55161467A
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- small
- picture
- notice
- density level
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Image Processing (AREA)
- Editing Of Facsimile Originals (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
PURPOSE:To obtain a reproduced picture of high-density picture elements, by converting a notice picture element to a small picture element region and by forecasting the density level of each small picture element on a basis of the density level of the notice picture element and the density level of peripheral picture elements. CONSTITUTION:An input picture element signal is multiple-quantized by quantizer 1 and is stored in memory equipment 2. Operator 3 operates and forecasts the density level of each small picture element for division of the notice picture element according to contents of memory equipment 2. The forecasted result and the threshold level from memory equipment 5 where a threshold pattern is stored are decided by decider 4 to determine the black or white level of each small picture element. Consequently, since the notice picture element is divided into small picture elements and the density level is determined for every small picture element, a high- resolution reproduced picture can be obtained.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6904179A JPS55161467A (en) | 1979-06-02 | 1979-06-02 | Picture processing method |
US06/139,395 US4349846A (en) | 1979-04-17 | 1980-04-11 | Picture processing method |
DE19803014884 DE3014884A1 (en) | 1979-04-17 | 1980-04-17 | IMAGE PROCESSING PROCESS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6904179A JPS55161467A (en) | 1979-06-02 | 1979-06-02 | Picture processing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55161467A true JPS55161467A (en) | 1980-12-16 |
JPS6255345B2 JPS6255345B2 (en) | 1987-11-19 |
Family
ID=13391098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6904179A Granted JPS55161467A (en) | 1979-04-17 | 1979-06-02 | Picture processing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55161467A (en) |
-
1979
- 1979-06-02 JP JP6904179A patent/JPS55161467A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6255345B2 (en) | 1987-11-19 |
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