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Title:
IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD
Document Type and Number:
Japanese Patent JP2010252194
Kind Code:
A
Abstract:

To improve backlash in an edge portion by performing smoothing processing only on the edge portion of a pixel value by determining whether to perform smoothing processing, not from attribute data but from the density difference of image data.

For reducing jaggies in second image data on the basis of first image data, the second image data obtained by performing pseudo-halftone processing on each image signal of the first image data, and attribute data indicating the attribute of each pixel in the first image data, a determination signal indicating whether to perform smoothing processing is output, on the basis of the first image data; and edge correction data for the smoothing processing are generated from the first image data, and whether to perform edge correction processing that uses the edge correction data is selected, according to the determination signal and the attribute data. Moreover, the second image data and the edge correction data are compared by an image signal to output either one thereof, according to the result of the comparison.


Inventors:
KASHIBUCHI YOICHI
KABURAGI HIROSHI
Application Number:
JP2009101381A
Publication Date:
November 04, 2010
Filing Date:
April 17, 2009
Export Citation:
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Assignee:
CANON KK
International Classes:
H04N1/409; G06T5/00; G06T5/20; H04N1/40
Domestic Patent References:
JPH11331603A1999-11-30
JP2002281317A2002-09-27
JP2006295877A2006-10-26
JPH01115272A1989-05-08
JPH0548890A1993-02-26
JPH11305752A1999-11-05
JPH11275368A1999-10-08
Attorney, Agent or Firm:
Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama
Nagakawa Yukimitsu



 
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