Image processing method, and image processor and storage...

Details Image processing method, and image processor and storage... Image processing method, and image processor and storage...

2007-01-16

2007-01-16

Lee, Thomas D. (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003050, C382S237000

Reexamination Certificate

active

09795449

ABSTRACT:
The present invention relates to an image processing method using the error diffusion method to prevent jumps in a highlight part and darkening in a shadow part at high resolution. The image processing method comprises a step of calculating an average value of density values of N×M (N, M>1) pixels, a step of adding the average value and a diffused quantization error value, a step of quantizing the addition result with a predetermined number of tones, a step of selecting a quantization pattern corresponding to the quantization result, and a step of calculating the diffused quantization error value from the quantization error. The error diffusion algorithm has flexibility in outputting dots. In other words, error diffusion processing is performed in N×M pixel units, and a plurality of quantization patterns are provided, and a quantization pattern is selected based on the quantization result. Therefore jumps in a highlight part and smears in a shadow part can be prevented, the tone maintenance characteristic unique to the error diffusion can be satisfied, and a smooth and sharp image can be obtained.

REFERENCES:
patent: 5014333 (1991-05-01), Miller et al.
patent: 5050000 (1991-09-01), Ng
patent: 5610999 (1997-03-01), Bannai et al.
patent: 6203133 (2001-03-01), Tanaka et al.
patent: 6369912 (2002-04-01), Kumashiro
patent: 6-189119 (1994-07-01), None
patent: 8-307690 (1996-11-01), None
patent: 9-23334 (1997-01-01), None
patent: 9-46522 (1997-02-01), None
patent: 11-215376 (1999-08-01), None

Affiliated with

Also associated with

Rating

Image processing method, and image processor and storage... 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 method, and image processor and storage..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing method, and image processor and storage... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3824351