Invention Grant
US08559057B2 Image processing device, image forming apparatus, and image processing method generating double color image data with high contrast and rich tone
有权
图像处理装置,图像形成装置和产生具有高对比度和丰富色调的双色图像数据的图像处理方法
- Patent Title: Image processing device, image forming apparatus, and image processing method generating double color image data with high contrast and rich tone
- Patent Title (中): 图像处理装置,图像形成装置和产生具有高对比度和丰富色调的双色图像数据的图像处理方法
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Application No.: US13022925Application Date: 2011-02-08
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Publication No.: US08559057B2Publication Date: 2013-10-15
- Inventor: Michiko Fujiwara
- Applicant: Michiko Fujiwara
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2010-028175 20100210
- Main IPC: G06F15/00
- IPC: G06F15/00 ; G06K1/00 ; H04N1/60 ; G06F3/08

Abstract:
An image processing device calculates saturation of each pixel on the basis of multicolor image data; determines a pixel as a chromatic/achromatic pixel based on a threshold value; generates achromatic pixel data for formation of an image using only a color material of black; generates chromatic pixel data constituting a double color image and containing single color image data for formation of an image realized by a combination of color materials; generates for the chromatic pixel, single color image data such that the consumption of a color material of a chromatic color corresponding to the single color increases with increase in the saturation of the chromatic pixel. This makes it possible to generate double color image data by which high contrast and rich tone reproduction can be realized and the boundary between the achromatic region and the chromatic region can be expressed with natural gradation.
Public/Granted literature
- US20110194129A1 IMAGE PROCESSING DEVICE, IMAGE FORMING APPARATUS, AND IMAGE PROCESSING METHOD Public/Granted day:2011-08-11
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