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    • 1. 发明授权
    • Image processing apparatus, image forming apparatus, and image processing method
    • 图像处理装置,图像形成装置和图像处理方法
    • US07623265B2
    • 2009-11-24
    • US11391808
    • 2006-03-28
    • Makio GotohMasanori Minami
    • Makio GotohMasanori Minami
    • H04N1/46
    • H04N1/40075H04N1/60
    • As the color conversion process for image data of an RGB signal, a color correction section 26 performs a color correction process, and a black generation and under color removal section 27 performs a black generation and under color removal process. In the color conversion process, the color correction section 26 and the black generation and under color removal section 27 are supplied with a halftone frequency recognized by a halftone frequency recognition section 23. The color correction section 26 and the black generation and under color removal section 27 change the process based upon the halftone frequency. As a result, an image processing apparatus is realized in which improved image quality can be produced by an optimum image process that is performed on an image containing a halftone area depending upon the halftone frequency of the halftone area so that image quality is improved.
    • 作为RGB信号的图像数据的颜色转换处理,颜色校正部26进行颜色校正处理,黑色生成和下部颜色去除部27进行黑色生成和颜色除去处理。 在颜色转换处理中,颜色校正部分26和黑色产生和下色移除部分27被供给由半色调频率识别部分23识别的半色调频率。色彩校正部分26和黑色生成和下面的颜色去除部分 27根据半色调频率改变过程。 结果,实现了一种图像处理装置,其中可以通过根据半色调区域的半色调频率对包含半色调区域的图像执行的最佳图像处理来产生改善的图像质量,从而提高图像质量。
    • 5. 发明申请
    • IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, IMAGE FORMING APPARATUS, PROGRAM, AND RECORDING MEDIUM
    • 图像处理装置,图像处理方法,图像形成装置,程序和记录介质
    • US20090225370A1
    • 2009-09-10
    • US12396897
    • 2009-03-03
    • Makio GotohYuri NakayamaMasanori Minami
    • Makio GotohYuri NakayamaMasanori Minami
    • H04N1/40H04N1/405
    • H04N1/6022H04N1/4052
    • An image processing apparatus is provided that restrains image quality deterioration of image data read with a resolution in a sub-scanning direction set lower than a resolution in a main scanning direction from a document containing text, halftone photographs, line drawings, photographs, etc. An image processing apparatus performs the tone reproduction processing by applying error diffusion processing to the image data that has undergone processing of making the resolution in the sub-scanning direction equal to the resolution in the main scanning direction when the resolution in the sub-scanning direction is lower than the resolution in the main scanning direction and applying dither processing to the image data in other case. When the resolution in the sub-scanning direction is lower than the resolution in the main scanning direction, the halftone processing is applied to the entire image data that sharpness and smoothing processing has been performed.
    • 提供一种图像处理装置,其从包含文本,半色调照片,线条图,照片等的文档抑制以比主扫描方向上的分辨率低的副扫描方向以分辨率读取的图像数据的图像质量劣化。 图像处理装置通过对在副扫描方向上的分辨率为副扫描方向上的分辨率等于主扫描方向上的分辨率的处理的图像数据进行误差扩散处理来进行色调再现处理 低于主扫描方向上的分辨率,并且在其他情况下对图像数据应用抖动处理。 当副扫描方向上的分辨率低于主扫描方向上的分辨率时,将半色调处理应用于执行了清晰度和平滑处理的整个图像数据。
    • 6. 发明授权
    • Image processing apparatus, image processing method, image forming apparatus, program, and recording medium
    • 图像处理装置,图像处理方法,图像形成装置,程序和记录介质
    • US08248659B2
    • 2012-08-21
    • US12396897
    • 2009-03-03
    • Makio GotohYuri NakayamaMasanori Minami
    • Makio GotohYuri NakayamaMasanori Minami
    • H04N1/40H04N1/405
    • H04N1/6022H04N1/4052
    • An image processing apparatus is provided that restrains image quality deterioration of image data read with a resolution in a sub-scanning direction set lower than a resolution in a main scanning direction from a document containing text, halftone photographs, line drawings, photographs, etc. An image processing apparatus performs the tone reproduction processing by applying error diffusion processing to the image data that has undergone processing of making the resolution in the sub-scanning direction equal to the resolution in the main scanning direction when the resolution in the sub-scanning direction is lower than the resolution in the main scanning direction and applying dither processing to the image data in other case. When the resolution in the sub-scanning direction is lower than the resolution in the main scanning direction, the halftone processing is applied to the entire image data that sharpness and smoothing processing has been performed.
    • 提供一种图像处理装置,其从包含文本,半色调照片,线条图,照片等的文档抑制以比主扫描方向上的分辨率低的副扫描方向以分辨率读取的图像数据的图像质量劣化。 图像处理装置通过对在副扫描方向上的分辨率为副扫描方向上的分辨率等于主扫描方向上的分辨率的处理的图像数据进行误差扩散处理来进行色调再现处理 低于主扫描方向上的分辨率,并且在其他情况下对图像数据应用抖动处理。 当副扫描方向上的分辨率低于主扫描方向上的分辨率时,将半色调处理应用于执行了清晰度和平滑处理的整个图像数据。