Image forming method and apparatus

• US 20050206922A1
• Filed: 09/09/2004
• Published: 09/22/2005
• Est. Priority Date: 03/18/2004
• Status: Active Grant

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Une, Kiyoshi
• Granted Patent: US 7,505,175 B2
• Time in Patent Office: Days
• US Class Current: 358/1.900
• CPC Class Codes: G06K 15/02 using printers
• CPC Class Codes: G06K 15/1852 involving combining data of different types
• CPC Class Codes: G06T 11/203 Drawing of straight lines or curves

Abstract

An image forming method for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, in which different image processing is implemented respectively on first raster data created on the basis of a pattern fill command written in the page description language, and second raster data created on the basis of a command other than the pattern fill command.

Claims

1. An image forming method for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, wherein different image processing is implemented on first raster data created on the basis of a pattern fill command written in the page description language, and second raster data created on the basis of a command other than the pattern fill command.

4. The image forming method according to claim 1, wherein, upon the creation of the first raster data and the second raster data, different identification information is attached respectively to the first raster data and the second raster data, and the image processing is implemented on the basis of the identification information.

7. The image forming method according to claim 1, wherein only the first raster data are not subjected to a screen processing.

10. The image forming method according to claim 1, wherein a screen ruling of a screen used in screen processing that is implemented on the first raster data is set to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

13. The image forming method according to claim 1, wherein a screen used in screen processing implemented on the first raster data has a pattern which is shifted from a predetermined pattern.

16. The image forming method according to claim 1, wherein only the first raster data are not subjected to color conversion processing and color correction processing.

2. An image forming method for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, wherein different image processing is implemented respectively on first raster data created on the basis of a line drawing command, from among line drawing commands written in the page description language, in which a line width does not exceed a fixed value or a density does not exceed a fixed value, and on second raster data created on the basis of a command other than the line drawing command.

5. The image forming method according to claim 2, wherein, upon the creation of the first raster data and the second raster data, different identification information is attached respectively to the first raster data and the second raster data, and the image processing is implemented on the basis of the identification information.

8. The image forming method according to claim 2, wherein only the first raster data are not subjected to a screen processing.

11. The image forming method according to claim 2, wherein a screen ruling of a screen used in screen processing that is implemented on the first raster data is set to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

14. The image forming method according to claim 2, wherein a screen used in screen processing implemented on the first raster data has a pattern which is shifted from a predetermined pattern.

17. The image forming method according to claim 2, wherein only the first raster data are not subjected to color conversion processing and color correction processing.

3. An image forming method for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, wherein different image processing is implemented respectively on first raster data created on the basis of a character drawing command, from among character drawing commands written in the page description language, in which a character size does not exceed a fixed value or a density does not exceed a fixed value, and on second raster data created on the basis of a command other than the character drawing command.

6. The image forming method according to claim 3, wherein, upon the creation of the first raster data and the second raster data, different identification information is attached respectively to the first raster data and the second raster data, and the image processing is implemented on the basis of the identification information.

9. The image forming method according to claim 3, wherein only the first raster data are not subjected to a screen processing.

12. The image forming method according to claim 3, wherein a screen ruling of a screen used in screen processing that is implemented on the first raster data is set to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

15. The image forming method according to claim 3, wherein a screen used in screen processing implemented on the first raster data has a pattern which is shifted from a predetermined pattern.

18. The image forming method according to claim 3, wherein only the first raster data are not subjected to color conversion processing and color correction processing.

19. An image forming apparatus for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, comprising:

image processing switching unit which switches between image processing that is implemented on first raster data created on the basis of a pattern fill command written in the page description language, and image processing that is implemented on second raster data created on the basis of a command other than the pattern fill command.

22. The image forming apparatus according to claim 19, further comprising identification information attaching unit which attaches different identification information respectively to the first raster data and the second raster data upon the creation of the first raster data and the second raster data,

wherein the image processing switching unit switches between the image processing that is implemented on the first raster data and the image processing that is implemented on the second raster data on the basis of the identification information attached by the identification information attaching unit.

25. The image forming apparatus according to claim 19, wherein the image processing switching unit does not implement screen processing on the first raster data alone.

28. The image forming apparatus according to claim 19, wherein the image processing switching unit sets a screen ruling of a screen used in screen processing that is implemented on the first raster data to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

31. The image forming apparatus according to claim 19, wherein the image processing switching unit implements screen processing on the first raster data with the use of a screen having a pattern which is shifted from a predetermined pattern.

34. The image forming apparatus according to claim 19, wherein the image processing switching unit does not implement color conversion processing and color correction processing on the first raster data alone.

20. An image forming apparatus for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, comprising:

image processing switching unit which switches between image processing that is implemented on first raster data created on the basis of a line drawing command, from among line drawing commands written in the page description language, in which a line width does not exceed a fixed value or a density does not exceed a fixed value, and image processing that is implemented on second raster data created on the basis of a command other than the line drawing command.

23. The image forming apparatus according to claim 20, further comprising identification information attaching unit which attaches different identification information respectively to the first raster data and the second raster data upon the creation of the first raster data and the second raster data,

wherein the image processing switching unit switches between the image processing that is implemented on the first raster data and the image processing that is implemented on the second raster data on the basis of the identification information attached by the identification information attaching unit.

26. The image forming apparatus according to claim 20, wherein the image processing switching unit does not implement screen processing on the first raster data alone.

29. The image forming apparatus according to claim 20, wherein the image processing switching unit sets a screen ruling of a screen used in screen processing that is implemented on the first raster data to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

32. The image forming apparatus according to claim 20, wherein the image processing switching unit implements screen processing on the first raster data with the use of a screen having a pattern which is shifted from a predetermined pattern.

35. The image forming apparatus according to claim 20, wherein the image processing switching unit does not implement color conversion processing and color correction processing on the first raster data alone.

21. An image forming apparatus for creating raster data based on image data written in a page description language, and forming an image based on the created raster data, comprising:

image processing switching unit which switches between image processing that is implemented on first raster data created on the basis of a character drawing command, from among character drawing commands written in the page description language, in which a character size does not exceed a fixed value or a density does not exceed a fixed value, and image processing that is implemented on second raster data created on the basis of a command other than the character drawing command.

24. The image forming apparatus according to claim 21, further comprising identification information attaching unit which attaches different identification information respectively to the first raster data and the second raster data upon the creation of the first raster data and the second raster data,

wherein the image processing switching unit switches between the image processing that is implemented on the first raster data and the image processing that is implemented on the second raster data on the basis of the identification information attached by the identification information attaching unit.

27. The image forming apparatus according to claim 21, wherein the image processing switching unit does not implement screen processing on the first raster data alone.

30. The image forming apparatus according to claim 21, wherein the image processing switching unit sets a screen ruling of a screen used in screen processing that is implemented on the first raster data to be higher than a screen ruling of a screen used in the screen processing that is implemented on the second raster data.

33. The image forming apparatus according to claim 21, wherein the image processing switching unit implements screen processing on the first raster data with the use of a screen having a pattern which is shifted from a predetermined pattern.

36. The image forming apparatus according to claim 21, wherein the image processing switching unit does not implement color conversion processing and color correction processing on the first raster data alone.