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    • 12. 发明申请
    • Image processing system, apparatus, and method, and color reproduction method
    • 图像处理系统,装置和方法以及色彩再现方法
    • US20050111017A1
    • 2005-05-26
    • US10927234
    • 2004-08-27
    • Kosei TakahashiTakeshi MakitaOsamu Yamada
    • Kosei TakahashiTakeshi MakitaOsamu Yamada
    • B41B1/00H04N1/60
    • H04N1/6033H04N1/6027H04N1/6058
    • In a system for converting an input image signal input from an image input device into an output image signal to be output by an image output device, an image compression unit converts a spectral image input via an image input unit into R, G, and B data, obtains principal component data by making principal component analysis of the spectral image, and stores these data in an input image storage unit. When the principal component data and R, G, and B data are loaded and stored in an output image storage unit, a spectral reflectance reconstruction unit reconstructs the spectral reflectance of each pixel using these data. A printer model determines the dot quantities of inks used to record each pixel in an image output device on the basis of the calculated spectral reflectance, and generates an output image signal for the image output device. In this way, image data which allows to estimate the spectral reflectance characteristics of an input image is provided, and faithful color reproduction can be realized.
    • 在用于将从图像输入装置输入的输入图像信号转换成由图像输出装置输出的输出图像信号的系统中,图像压缩单元将经由图像输入单元输入的分光图像转换为R,G和B 数据,通过对光谱图像进行主成分分析来获得主成分数据,并将这些数据存储在输入图像存储单元中。 当主成分数据和R,G和B数据被加载并存储在输出图像存储单元中时,光谱反射率重建单元使用这些数据重建每个像素的光谱反射率。 打印机型号基于所计算的光谱反射率确定用于记录图像输出装置中的每个像素的墨水的点数,并且生成用于图像输出装置的输出图像信号。 以这种方式,提供允许估计输入图像的光谱反射特性的图像数据,并且可以实现忠实的色彩再现。
    • 15. 发明授权
    • Reducing the effects of noise in level number transformation
    • 降低噪声在水平数转换中的影响
    • US5621476A
    • 1997-04-15
    • US464367
    • 1995-06-05
    • Takeshi MakitaSusumu SugiuraOsamu Yamada
    • Takeshi MakitaSusumu SugiuraOsamu Yamada
    • G09G1/16G06T5/00G09G5/00H04N1/405H04N5/213H04N5/21
    • H04N1/4052H04N5/213
    • An image processing apparatus prevents an increase in random noise and the like produced by distributing a transformation error, which is produced at the time of a level-number transformation, to unprocessed pixel data. Error data X.sub.n is added to pixel data, which has entered via an input unit, by an adder. Thereafter, the resulting data is subjected to a level-number transformation by a binarizing circuit. Transformation error produced at the time of the level-number transformation is calculated by an error arithmetic unit. The transformation error thus calculated is distributed to unprocessed pixel data by an error-diffusion unit, and the error is accumulated in a line buffer memory as error data. When processing of a prescribed number of lines has ended, a line-number discriminating circuit clears the error data that has been accumulated in the line buffer memory. As a result, an increase in random noise is prevented.
    • 图像处理装置防止通过将在电平数转换时产生的变换误差分配给未处理的像素数据而产生的随机噪声等的增加。 误差数据Xn被加到通过输入单元输入的像素数据中。 此后,通过二值化电路对所得数据进行电平数转换。 在电平数转换时产生的变形误差由误差运算单元计算。 这样计算的变换误差通过误差扩散单元分配给未处理的像素数据,并且该错误被累积在行缓冲存储器中作为错误数据。 当规定数量的线路的处理已经结束时,线路识别电路清除已经积累在行缓冲存储器中的错误数据。 结果,防止了随机噪声的增加。
    • 16. 发明授权
    • Image processing method and apparatus
    • 图像处理方法和装置
    • US5463478A
    • 1995-10-31
    • US243929
    • 1994-05-17
    • Takeshi MakitaSusumu SugiuraOsamu Yamada
    • Takeshi MakitaSusumu SugiuraOsamu Yamada
    • G09G1/16G06T5/00G09G5/00H04N1/405H04N5/213H04N1/409
    • H04N1/4052H04N5/213
    • An image processing apparatus prevents an increase in random noise and the like produced by distributing a transformation error, which is produced at the time of a level-number transformation, to unprocessed pixel data. Error data X.sub.n is added to pixel data, which has entered via an input unit, by an adder. Thereafter, the resulting data is subjected to a level-number transformation by a binarizing circuit. Transformation error produced at the time of the level-number transformation is calculated by an error arithmetic unit. The transformation error thus calculated is distributed to unprocessed pixel data by an error-diffusion unit, and the error is accumulated in a line buffer memory as error data. When processing of a prescribed number of lines has ended, a line-number discriminating circuit clears the error data that has been accumulated in the line buffer memory. As a result, an increase in random noise is prevented.
    • 图像处理装置防止通过将在电平数转换时产生的变换误差分配给未处理的像素数据而产生的随机噪声等的增加。 误差数据Xn被加到通过输入单元输入的像素数据中。 此后,通过二值化电路对所得数据进行电平数转换。 在电平数转换时产生的变形误差由误差运算单元计算。 这样计算的变换误差通过误差扩散单元分配给未处理的像素数据,并且该错误被累积在行缓冲存储器中作为错误数据。 当规定数量的线路的处理已经结束时,线路识别电路清除已经积累在行缓冲存储器中的错误数据。 结果,防止了随机噪声的增加。