Title:
IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2013/179657
Kind Code:
A1
Abstract:
An image processing apparatus configured to perform a halftone processing on input image data using a plurality of threshold value matrixes, includes a determination means configured to, using a threshold value matrix according to an input value expressing a target pixel in the input image data, determine an output value of the target pixel by comparing the input value with a threshold value in the threshold value matrix. Each of the plurality of threshold value matrixes is used for a different input value and has a size smaller than the input image data, and a size of at least one threshold value matrix from among the plurality of threshold value matrixes is determined according to a dot pattern expressing a corresponding input value.
Inventors:
KIKUTA KYOHEI (JP)
Application Number:
PCT/JP2013/003379
Publication Date:
December 05, 2013
Filing Date:
May 29, 2013
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
H04N1/405; G06T5/00
Foreign References:
| JPH0918714A | 1997-01-17 | |||
| JP2003046777A | 2003-02-14 | |||
| JP2004133859A | 2004-04-30 | |||
| JPH10191053A | 1998-07-21 | |||
| JP2001169095A | 2001-06-22 |
Attorney, Agent or Firm:
ABE, Takuma et al. (30-2 Shimomaruko 3-chome, Ohta-k, Tokyo 01, JP)
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