Title:
画像処理装置、印刷装置、画像処理方法および画像処理プログラム
Document Type and Number:
Japanese Patent JP5750969
Kind Code:
B2
Abstract:
An image is divided into first a second regions on the basis of inputted image data, and a comparison is made between the gradation values of pixels in the first region and threshold values corresponding to the pixels of the first region of a dither mask. The results of the comparison are referenced to determine whether or not dots are formed in the pixels of the first region. Errors are calculated based on the results of determining the first boundary pixels, which are in the first region near the boundary between the first region second regions. Some of the errors are distributed as diffusion errors to pixels in the second region near the boundary. The diffusion errors distributed from the first boundary pixels are added, and it is determined whether or not dots are formed by the error diffusion method in the pixels of the second region.
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Inventors:
Shigeaki Kakutani
Application Number:
JP2011066008A
Publication Date:
July 22, 2015
Filing Date:
March 24, 2011
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H04N1/405; G06T5/00
Domestic Patent References:
| JP2001268361A | ||||
| JP2006287474A | ||||
| JP2005072748A | ||||
| JP2006240054A | ||||
| JP2001128004A |
Attorney, Agent or Firm:
Meisei International Patent Office