Patent US2625604A successfully refreshed from Google Patents.
Patent EP1191784A1 successfully refreshed from Google Patents.
EP1191784A1
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Method of processing document image data
Assignee: Xerox Corp
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Filing: 2000-11-29
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Granted: —
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Expires: 2020-11-29
Abstract
Abstract The present invention is directed to a method for differentially processing image types within a document image to enhance the quality of on an image on a receiving medium. In one aspect of the invention, the method begins by receiving document image data (170) including one or more image regions. The method determines (174) for each image region whether the region includes any image data corresponding to a first image type. The method then prints regions including image data corresponding to the first image type according to a first pixel management process and prints regions not including image data corresponding to the first image type according to a second pixel management process.
Inventors
- 👤 Peter A. Torpey
- 👤 Virgil Joseph Hull
- 👤 Glenn K. Smith
- 👤 Lesley P. Dudek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; G06K15/105; G06K15/107; H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/58; G06K2215/00; G06K2215/0082; G06K2215/0094
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
177 words
A method of processing color image data for printing
on an inkjet printer to reduce intercolor bleeding in an
image on a receiving medium, comprising: receiving color image data comprising a plurality of
color planes that combine to form an array of composite
pixels, the color planes including a black plane and a non-black
plane, wherein each color plane comprises an array of
separation pixels; identifying an interface between a black area and a
color area; modifying the color image data corresponding to an M-pixel
wide color border in the color area using a thinning
operation according to a color pixel modification pattern,
the color pixel modification pattern identifying a fraction
of the separation pixels in a non-black plane to remove
from the color image data; and modifying the color image data within an N -pixel wide
black border in the black area using a substitution
operation according to a black pixel modification pattern,
the black pixel modification pattern replacing a fraction
of the separation pixels in the black plane with separation
pixels in a non-black plane.
Claim 2
Independent Claim
167 words
A method of processing color image data for printing
on an inkjet printer to reduce intercolor bleeding in an
image on a receiving medium, comprising: receiving a target pixel, the target pixel comprising a plurality of separation pixels each corresponding to
an individual color plane, the color planes including a
black plane and at least one non-black plane; determining if the target pixel is within an black
border region near a black/color interface, and if so,
modifying the target pixel using a substitution operation
according to a black pixel modification pattern, the black
pixel modification pattern identifying separation pixels in
the black plane to replace with separation pixels from a
non-black plane; and determining if the target pixel is within a color
border region near a black/color interface, and if so,
modifying the target pixel using a thinning operation
according to a color pixel modification pattern, the color
pixel modification pattern identifying a pattern of
separation pixels in a non-black plane to remove from the
composite image.
Claim 3
Dependent Claim
102 words
The method of claim 2, wherein the step of determining
if the target pixel is within a black border region
comprises: determining if a first condition is met, the first
condition being that the number of black pixels within a
black window filter is within a black border pixel range; determining if a second condition is met, the second
condition being that the number of color only pixels within
the black window filter is greater than an interface
threshold; and identifying the target pixel as being within a black
border region near an interface when the first and second
conditions are met.
Claim 4
Independent Claim
127 words
A device for processing color image data to reduce
intercolor bleeding in an image on a receiving medium,
comprising: a statistics collection filter connected to receive a
target pixel and a set of surrounding pixels, the
statistics collection filter generating a statistics
signal; a pixel identification circuit connected to receive
the statistics signal, the identification circuit
generating a pixel identification signal indicating whether
the target pixel is within a border region; and a pixel modification circuit connected to receive the
pixel identification signal, the modification circuit
modifying the target pixel according to a black bitmap
modification pattern when the target pixel is within a
black border and modifying the target pixel according to a
color bitmap modification pattern when the target pixel is
within a color border.
References Cited (Backward Citations)
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