Automatic color dropout using luminance-chrominance space proces

Details Automatic color dropout using luminance-chrominance space proces Automatic color dropout using luminance-chrominance space proces

1998-02-10

2000-03-07

Tran, Phuoc

Image analysis

Color image processing

Drop-out color in image

G06K 900

Patent

active

06035058&

ABSTRACT:
A document (10) is scanned to provide a digital image. At least one non-dropout color is selected (32) and transformed to a Luminance-Chrominance space (34). Each pixel of the scanned image is converted to the Luminance-Chrominance space (36) and the distance of each of the image pixels from the non-dropout color is determined (38). Each of the image pixels is converted to black (44) if the distance from the non-dropout color is less than or equal to a threshold value, and converted to white (42) if the distance is greater than the threshold value. The converted black and white pixels are then stored.

REFERENCES:
patent: 4727425 (1988-02-01), Mayne et al.
patent: 5010580 (1991-04-01), Vincent et al.
patent: 5014328 (1991-05-01), Rudak
patent: 5014329 (1991-05-01), Rudak
patent: 5335292 (1994-08-01), Lovelady et al.
patent: 5621816 (1997-04-01), Ruppert
patent: 5664031 (1997-09-01), Murai et al.

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