Invention Grant
US08169664B2 Image processing apparatus and method for quantizing pixel of interest by error diffusion method
失效
用于通过误差扩散法量化感兴趣像素的图像处理装置和方法
- Patent Title: Image processing apparatus and method for quantizing pixel of interest by error diffusion method
- Patent Title (中): 用于通过误差扩散法量化感兴趣像素的图像处理装置和方法
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Application No.: US12412713Application Date: 2009-03-27
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Publication No.: US08169664B2Publication Date: 2012-05-01
- Inventor: Naoto Kawamura
- Applicant: Naoto Kawamura
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Cowan, Liebowitz & Latman, P.C.
- Priority: JP2008-096559 20080402
- Main IPC: H04N1/40
- IPC: H04N1/40
Abstract:
A quantizing unit, error detector, error diffusion matrix, and adder quantize a pixel of interest of an input image by an error diffusion method. A calculation unit and gain adjuster calculate a value to be added to the pixel of interest with reference to quantized pixels. The adder adds the calculated value to the pixel of interest. A control unit controls the calculation of the gain adjuster.
Public/Granted literature
- US20090251735A1 IMAGE PROCESSING APPARATUS AND METHOD THEREOF Public/Granted day:2009-10-08
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