JPS6447547A - Recording system of halftone - Google Patents
Recording system of halftoneInfo
- Publication number
- JPS6447547A JPS6447547A JP20339487A JP20339487A JPS6447547A JP S6447547 A JPS6447547 A JP S6447547A JP 20339487 A JP20339487 A JP 20339487A JP 20339487 A JP20339487 A JP 20339487A JP S6447547 A JPS6447547 A JP S6447547A
- Authority
- JP
- Japan
- Prior art keywords
- dot
- pattern
- scanning direction
- sub
- thermal head
- 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
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Electronic Switches (AREA)
- Color, Gradation (AREA)
Abstract
PURPOSE:To obtain a recording picture having high resolution by determining a control-level variation rule so that dot patterns are projected along lines extended in the main scanning direction and the sub-scanning direction passing the specified position of a dot. CONSTITUTION:When a matrix of 4X4 is used as a gradation expression unit to an input signal in 6 bits per 1 dot and a 64 gradation is expressed by employing six dot patterns of a1-a6 having a control level in 10 per 1 dot, the pattern a5 is formed in a pattern being in contact in 1 dot only to one block of adjacent four blocks, and stable pattern fusion is conducted where being in contact with adjacent blocks in the same manner as the pattern a4. Since the pattern a5 is constituted in a pattern continuing in the vertical direction in the width of lateral 3 dots, however, a thermal head is driven continuously in the sub-scanning direction regarding 3 dot sections when the lateral direction is used as the main scanning direction of the thermal head and the vertical direction as the sub-scanning direction of the thermal head, and stable recording patterns are acquired in the same manner as solid printing regarding the sub- scanning directions of the 3 dot sections. Accordingly, a recording picture having excellent high resolution is obtained.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62203394A JP2618910B2 (en) | 1987-08-18 | 1987-08-18 | Halftone recording method |
EP19880307630 EP0304289A3 (en) | 1987-08-18 | 1988-08-17 | Half-tone image reproduction method and apparatus |
US07/233,361 US4910603A (en) | 1987-08-18 | 1988-08-18 | Half-tone image reproduction method and apparatus using partial density ranges |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62203394A JP2618910B2 (en) | 1987-08-18 | 1987-08-18 | Halftone recording method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6447547A true JPS6447547A (en) | 1989-02-22 |
JP2618910B2 JP2618910B2 (en) | 1997-06-11 |
Family
ID=16473318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62203394A Expired - Fee Related JP2618910B2 (en) | 1987-08-18 | 1987-08-18 | Halftone recording method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2618910B2 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5473650A (en) * | 1977-11-25 | 1979-06-13 | Keisatsuchiyou Chokan | Gradation recording method |
JPS6199459A (en) * | 1984-10-19 | 1986-05-17 | Olympus Optical Co Ltd | Gradation recording method |
JPS61176273A (en) * | 1985-01-31 | 1986-08-07 | Toshiba Corp | Thermal transfer recording system |
JPS622775A (en) * | 1985-06-28 | 1987-01-08 | Toshiba Corp | Multi-gradation recording system |
-
1987
- 1987-08-18 JP JP62203394A patent/JP2618910B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5473650A (en) * | 1977-11-25 | 1979-06-13 | Keisatsuchiyou Chokan | Gradation recording method |
JPS6199459A (en) * | 1984-10-19 | 1986-05-17 | Olympus Optical Co Ltd | Gradation recording method |
JPS61176273A (en) * | 1985-01-31 | 1986-08-07 | Toshiba Corp | Thermal transfer recording system |
JPS622775A (en) * | 1985-06-28 | 1987-01-08 | Toshiba Corp | Multi-gradation recording system |
Also Published As
Publication number | Publication date |
---|---|
JP2618910B2 (en) | 1997-06-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |