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    • 4. 发明授权
    • Image processing method and image processing apparatus
    • 图像处理方法和图像处理装置
    • US06724507B1
    • 2004-04-20
    • US09345783
    • 1999-07-01
    • Hiroaki IkegamiHitoshi OgatsuRyosuke HigashikataTakahide Inoue
    • Hiroaki IkegamiHitoshi OgatsuRyosuke HigashikataTakahide Inoue
    • G03F308
    • H04N1/6058
    • Provided is an image processing method and a apparatus of converting a color input image or a partial region thereof in accordance with a color gamut of a color image output apparatus is provided. The method and apparatus is characterized in that only the region requiring color gamut compression can be put to color gamut compression depending on the distribution of an input image, that the direction of the color gamut compression can be controlled continuously for each of the regions; the amount of the color gamut compression can be controlled continuously including clipping, that when color gamut compression is conducted by a color converter of a multi-dimensional DLUT interpolating calculation type, an excessively unnecessary color gamut compression can be avoided particularly upon clipping, and that there is enabled correction for visual bending in iso-hue lines caused by distortion of a color space in each of the regions of the color space.
    • 提供了一种图像处理方法和根据彩色图像输出装置的色域转换彩色输入图像或其部分区域的装置。 该方法和装置的特征在于,只有需要色域压缩的区域可以根据输入图像的分布进行色域压缩,可以为每个区域连续地控制色域压缩的方向; 可以连续地控制色域压缩量,包括削波,当通过多维DLUT内插计算类型的色彩转换器进行色域压缩时,特别是在限幅时可以避免过度不必要的色域压缩,并且, 由于颜色空间的每个区域中的颜色空间的变形而导致的等色线中的视觉弯曲的校正。