Image processing apparatus and image processing method
AssigneeCanon Kabushiki Kaisha
InventorsTakayuki Tsutsumi, Hisashi Ishikawa
Life of this patent
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Abstract
An apparatus includes a processing unit configured to perform halftone processing for input image data and output halftone image data, a determination unit configured to determine a mixing ratio based on a difference value between a low frequency component of the halftone image data and a low frequency component of the input image data, and a mixing unit configured to mix the input image data and the halftone image data based on the mixing ratio.
Claims15
An apparatus comprising:
- a processing unit configured to perform halftone processing for input image data and output halftone image data;
- a determination unit configured to determine a mixing ratio based on a difference value between a low frequency component of the halftone image data and a low frequency component of the input image data;
- and
- a mixing unit configured to generate output image data by mixing the input image data and the halftone image data based on the mixing ratio,
- wherein the output image data includes a pixel having a pixel value constituting the input image data, a pixel having a pixel value constituting the halftone image data, and a pixel having a pixel value calculated based on the pixel value constituting the input image data and the pixel value constituting the halftone image data.
A method comprising:
- performing halftone processing for input image data and outputting halftone image data;
- determining a mixing ratio based on a difference value between a low frequency component of the halftone image data and a low frequency component of the input image data;
- and
- generating output image data by mixing the input image data and the halftone image data based on the mixing ratio,
- wherein the output image data includes a pixel having a pixel value constituting the input image data, a pixel having a pixel value constituting the halftone image data, and a pixel having a pixel value calculated based on the pixel value constituting the input image data and the pixel value constituting the halftone image data.
A non-transitory computer-readable recording medium recording a program for realizing computer to execute a method comprising:
- performing halftone processing for input image data and outputting halftone image data;
- determining a mixing ratio based on a difference value between a low frequency component of the halftone image data and a low frequency component of the input image data;
- and
- generating output image data by mixing the input image data and the halftone image data based on the mixing ratio,
- wherein the output image data includes a pixel having a pixel value constituting the input image data, a pixel having a pixel value constituting the halftone image data, and a pixel having a pixel value calculated based on the pixel value constituting the input image data and the pixel value constituting the halftone image data.
Dependencies are inferred from the claim text.