Facsimile and static presentation processing – Static presentation processing – Attribute control
Reexamination Certificate
2006-04-11
2006-04-11
Lee, Tommy (Department: 2624)
Facsimile and static presentation processing
Static presentation processing
Attribute control
C358S003210, C358S003220, C382S270000
Reexamination Certificate
active
07027183
ABSTRACT:
An image forming apparatus capable of solving problems experienced in the error diffusion method operates in the following manner. An input pixel value is thresholded by a corrected threshold value, and a binarized pixel value is output. From the output value, the corrected threshold value is subtracted, the result is multiplied by a feedback coefficient β, and the result is diffused to the threshold values of surrounding pixels. As the threshold value and a scale of the pixel value are changed by the processing unit before thresholding, degree of edge enhancement is controlled.
REFERENCES:
patent: 4194221 (1980-03-01), Stoffel
patent: 4668995 (1987-05-01), Chen et al.
patent: 4955065 (1990-09-01), Ulichney
patent: 5014333 (1991-05-01), Miller et al.
patent: 5031050 (1991-07-01), Chan
patent: 5045952 (1991-09-01), Eschbach
patent: 5325211 (1994-06-01), Eschbach
patent: 5553166 (1996-09-01), Kakutani
patent: 5610999 (1997-03-01), Bannai et al.
patent: 6614556 (2003-09-01), Hong et al.
patent: 6625327 (2003-09-01), Ohshima et al.
Buchanan & Ingersoll PC
Lee Tommy
Minolta Co. , Ltd.
LandOfFree
Image processing apparatus and method allowing control of... 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 apparatus and method allowing control of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus and method allowing control of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3607347