Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2007-09-04
2007-09-04
Lee, Thomas D. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003090
Reexamination Certificate
active
10143617
ABSTRACT:
The appearance of edges in an image is improved through precise placement of subpixels within pixel cells that are located on or near edges in an image. Image data is examined to identify a “target pixel” near the edge of an object that represents the object and is adjacent to a “background pixel” that represents only background. The target pixel may represent both the object and its background or it may represent the object only. A “second pixel”, adjacent to the target pixel and representing the object, is also identified. The second pixel may represent both the object and its background or it may represent the object only. The target pixel's location with respect to the second pixel is analyzed to determine the placement of a subpixel within the target pixel cell and the placement of a subpixel within the second pixel cell, such that the edge of the object is well-defined and the density of the object is preserved. A vertical smoothing process can additionally be performed to improve further the appearance of edges in the image. The technique is particularly advantageous for printing a halftoned object represented by pixels that are not saturated.
REFERENCES:
patent: 4847641 (1989-07-01), Tung
patent: 5249242 (1993-09-01), Hanson et al.
patent: 5339171 (1994-08-01), Fujisawa et al.
patent: 5818971 (1998-10-01), Moolenaar et al.
patent: 6020979 (2000-02-01), Zeck et al.
patent: 6052203 (2000-04-01), Suzuki et al.
patent: 6072588 (2000-06-01), Dohnomae
patent: 6137918 (2000-10-01), Harrington et al.
patent: 6144461 (2000-11-01), Crean et al.
patent: 6243499 (2001-06-01), Loce et al.
patent: 6914615 (2005-07-01), Okada et al.
patent: 7102650 (2006-09-01), Okada et al.
patent: 2003/0210409 (2003-11-01), Huang et al.
patent: 9186867 (1997-07-01), None
patent: 11331608 (1999-11-01), None
patent: 2002299788 (2000-10-01), None
patent: 200249366 (2002-02-01), None
Bhattacharjya Anoop
Guleryuz Onur
Huang Jincheng
Shu Joseph
Brinich Stephen
Haro Rosalio
Lee Thomas D.
Seiko Epson Corporation
LandOfFree
PWM rendering for color/gray-scale text and graphics for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with PWM rendering for color/gray-scale text and graphics for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PWM rendering for color/gray-scale text and graphics for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3745237