JPS5640363A - Resampling method of digital picture - Google Patents
Resampling method of digital pictureInfo
- Publication number
- JPS5640363A JPS5640363A JP11582579A JP11582579A JPS5640363A JP S5640363 A JPS5640363 A JP S5640363A JP 11582579 A JP11582579 A JP 11582579A JP 11582579 A JP11582579 A JP 11582579A JP S5640363 A JPS5640363 A JP S5640363A
- Authority
- JP
- Japan
- Prior art keywords
- picture element
- buffer memory
- picture
- sum
- region
- 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
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
- H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Facsimile Image Signal Circuits (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE:To reprodece a digital picture faithfully, by extracting respective picture element information in a specific picture element region to calculate the sum of thier density levels and by determining the picture element, which has the maximum density in the region, as a balck level when the sum above is larger than a set value. CONSTITUTION:Respective picture element signals from the scanner obtained by resampling and reading the digital picture are sent to the system consisting of buffer memory 1 of one-line components and buffer memory 2 of one-picture element components and the system consisting of buffer memory 3 of one-picture element components simultaneously, and respective information of four picture elements A, B, G and H which are caused to agree with one another in respect to time are extracted and are transmitted to logical operation circuit 4 simultaneously to calculate the sum of their density levels; and if the calculation result is larger than the slash level selected previously, the picture element having the maximum density in the specific picture element region is determined as a black level, and output picture element signals are transmitted to the plotter through output buffer memory 5 of two-line components successively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11582579A JPS5640363A (en) | 1979-09-10 | 1979-09-10 | Resampling method of digital picture |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11582579A JPS5640363A (en) | 1979-09-10 | 1979-09-10 | Resampling method of digital picture |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5640363A true JPS5640363A (en) | 1981-04-16 |
Family
ID=14672037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11582579A Pending JPS5640363A (en) | 1979-09-10 | 1979-09-10 | Resampling method of digital picture |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5640363A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4827352A (en) * | 1986-03-17 | 1989-05-02 | Kabushiki Kaisha Toshiba | Method of and apparatus for changing the pixel density of a binary image using average values calculated from sets of reference pixels selected from the binary image |
-
1979
- 1979-09-10 JP JP11582579A patent/JPS5640363A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4827352A (en) * | 1986-03-17 | 1989-05-02 | Kabushiki Kaisha Toshiba | Method of and apparatus for changing the pixel density of a binary image using average values calculated from sets of reference pixels selected from the binary image |
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