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    • 7. 发明授权
    • Image processing apparatus
    • 图像处理装置
    • US5200839A
    • 1993-04-06
    • US900762
    • 1992-06-19
    • Takeharu Uchizono
    • Takeharu Uchizono
    • H04N1/393H04N1/405
    • H04N1/3935H04N1/4053
    • In an image processing apparatus which performs pseudo-halftone processing of multivalue image data, the multivalue image data are subjected to partial removal processing in accordance with an assigned reduction ratio, and the resultant multivalue data are then subjected to binary-coding processing. In partial removal processing, data of a removed picture element are reflected upon data of adjacent picture elements. Binary-coding processing is performed by referring to binary data of a predetermined region subjected to binary-coding processing. It is thereby possible to obtain an image having excellent gradation and resolution in a short time with a simple configuration of hardware, and to obtain an image not having deterioration of picture quality even in image reduction.
    • 在执行多值图像数据的伪半色调处理的图像处理装置中,根据所分配的缩小率对多值图像数据进行部分去除处理,然后对所得到的多值数据进行二进制编码处理。 在部分去除处理中,去除的像素的数据被反映在相邻像素的数据上。 通过参照进行二进制编码处理的预定区域的二进制数据来执行二进制编码处理。 由此,能够以简单的硬件配置在短时间内获得具有优异的灰度和分辨率的图像,并且即使在图像缩小中也可以获得不具有图像质量劣化的图像。