JPS641372A - Continuous gradation image data generation equipment commonly using random number synthesis and decimal part accumulation - Google Patents
Continuous gradation image data generation equipment commonly using random number synthesis and decimal part accumulationInfo
- Publication number
- JPS641372A JPS641372A JP62157300A JP15730087A JPS641372A JP S641372 A JPS641372 A JP S641372A JP 62157300 A JP62157300 A JP 62157300A JP 15730087 A JP15730087 A JP 15730087A JP S641372 A JPS641372 A JP S641372A
- Authority
- JP
- Japan
- Prior art keywords
- random number
- decimal part
- image data
- data generation
- generation equipment
- 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
- 238000009825 accumulation Methods 0.000 title 1
- 230000015572 biosynthetic process Effects 0.000 title 1
- 238000003786 synthesis reaction Methods 0.000 title 1
- 230000002194 synthesizing effect Effects 0.000 abstract 2
- 102100029376 Cryptochrome-1 Human genes 0.000 abstract 1
- 101000919351 Homo sapiens Cryptochrome-1 Proteins 0.000 abstract 1
Abstract
PURPOSE: To prevent the influence of tone jump by expressing the gradation of an image to be recorded by means of a first integer part and a first decimal part, synthesizing a random number with respect to the first decimal part, accumulating a second decimal part which can be obtained, and correcting the first integer part based on the results.
CONSTITUTION: In the generation of a gradient network in a main scanning direction, a decimal part DX with respect to respective picture elements along the main scanning direction is added with the same random number RDX, and a synthesized value CX is generated. An adder 253 obtains a synthesized value CY by synthesizing the decimal part DY with respect to an auxiliary scanning direction Y and a random number RDX. Thus, carrier signals CRX1 and CRY1 outputted from adders 153 and 253 are used when the first integer part IX is corrected and the integer part IXC (M bit) is generated. Thus, the influence of tone jump is prevented.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62157300A JP2563348B2 (en) | 1987-06-23 | 1987-06-23 | Continuous tone image data generator using both random number synthesis and fractional part accumulation |
| DE87112335T DE3786621T2 (en) | 1986-08-25 | 1987-08-25 | Method and device for generating image data used in gradation image recording. |
| US07/089,331 US4809082A (en) | 1986-08-25 | 1987-08-25 | Method of and apparatus for generating image data used to record an image having gradation |
| EP87112335A EP0259695B1 (en) | 1986-08-25 | 1987-08-25 | Method of and apparatus for generating image data used to record an image having gradation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62157300A JP2563348B2 (en) | 1987-06-23 | 1987-06-23 | Continuous tone image data generator using both random number synthesis and fractional part accumulation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JPS641372A true JPS641372A (en) | 1989-01-05 |
| JPH011372A JPH011372A (en) | 1989-01-05 |
| JP2563348B2 JP2563348B2 (en) | 1996-12-11 |
Family
ID=15646648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62157300A Expired - Lifetime JP2563348B2 (en) | 1986-08-25 | 1987-06-23 | Continuous tone image data generator using both random number synthesis and fractional part accumulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2563348B2 (en) |
-
1987
- 1987-06-23 JP JP62157300A patent/JP2563348B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2563348B2 (en) | 1996-12-11 |
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