Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2007-03-27
2007-03-27
Lee, Thomas D. (Department: 2625)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003010, C358S003040, C358S003050, C382S252000
Reexamination Certificate
active
10149174
ABSTRACT:
When image data is converted into an expression format based on the dot on-off state, such conversion is performed in a unit of a raster group comprising a predetermined number of adjacent rasters. When this is done, the binarization errors occurring in each pixel of the last raster located in the last position of such raster group are diffused into surrounding pixels and stored in a first storage unit. The errors are read out from the first storage unit for dot on-off state determination regarding the first raster of the raster group adjacent to the above-mentioned last raster, and binarization errors occurring in connection with this determination are stored in a second storage unit that permits faster reading and writing of data than the first storage unit. The remaining rasters following the first raster are converted into dot rows by conducting dot on-off state determination for each pixel therein in parallel with the process to convert the first raster into a dot row while taking into account the binarization errors that occurred in the first raster. Consequently, the errors that are taken into account by the pixels of the same raster are stored in the second storage unit that permits faster high-speed reading and writing of data, and the image data for the raster group can be converted at a high speed.
REFERENCES:
patent: 4733230 (1988-03-01), Kurihara et al.
patent: 5271070 (1993-12-01), Truong
patent: 5519791 (1996-05-01), Webb et al.
patent: 5553165 (1996-09-01), Webb et al.
patent: 5892851 (1999-04-01), Nguyen
patent: 5974228 (1999-10-01), Heitsch
patent: 6307978 (2001-10-01), Metaxas
patent: 0 606 988 (1994-07-01), None
patent: 0 625 844 (1994-11-01), None
patent: 0 880 275 (1998-11-01), None
patent: 1 005 221 (2000-05-01), None
patent: 6-266324 (1994-09-01), None
patent: 6-332417 (1994-12-01), None
patent: 10-93819 (1998-04-01), None
patent: 10-224627 (1998-08-01), None
patent: 2000-125122 (2000-04-01), None
patent: 10-0264804 (2000-06-01), None
Abstract of Korean Patent Publication 1002648040000, Pub. Date: Jun. 5, 2000, Korean Patent Abstracts.
Panagiotis T. Metaxas, “Optimal Parallel Error-Diffusion Dithering,” Proceedings of the SPIE, Conference on Colour Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts IV, vol. 3648, Jan. 26-29, 1999, pp. 485-494, XP008027794, San Jose, California, USA.
Yuefeng Zhang, “Line Diffusion: A Parallel Error Diffusion Algorithm for Digital Halftoning,” Visual Computer, vol. 12, No. 1, 1996, pp. 40-46, XP008027773.
Lee Thomas D.
Martine & Penilla & Gencarella LLP
LandOfFree
Image processing device, printing control device, image... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image processing device, printing control device, image..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing device, printing control device, image... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3795648