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    • 27. 发明授权
    • Image processing apparatus and image processing method
    • 图像处理装置和图像处理方法
    • US06753910B1
    • 2004-06-22
    • US09441824
    • 1999-11-17
    • Masami OgataTakashi TsuchiyaKazuhiko Ueda
    • Masami OgataTakashi TsuchiyaKazuhiko Ueda
    • H04N968
    • H04N5/20H04N5/205
    • The invention provides an image processing apparatus and an image processing method and can be applied to an image information apparatus such as, for example, a television receiver, a video tape recorder, a television camera and a printer so that the gradation can be corrected while effectively preventing a finally obtained image from partial deterioration of the contrast. An area to which each of image data belongs is discriminated with reference to, for example, a low frequency component of a pixel value, and a correction coefficient is produced for the area. Such correction coefficients are smoothed between successive frames, and the pixel values of the image data are corrected with the smoothed correction coefficients.
    • 本发明提供一种图像处理装置和图像处理方法,并且可以应用于诸如电视接收机,录像机,电视摄像机和打印机的图像信息装置,使得可以校正灰度等级 有效地防止最终获得的图像的对比度的部分劣化。 参考例如像素值的低频分量来区分图像数据所属的区域,并且为该区域产生校正系数。 这样的校正系数在连续帧之间被平滑,并且用平滑的校正系数来校正图像数据的像素值。
    • 29. 发明授权
    • Wavelet processing with leading and trailing edge extrapolation
    • 带前导和后沿外推的小波处理
    • US06658379B1
    • 2003-12-02
    • US09155936
    • 1999-03-04
    • Masami Ogata
    • Masami Ogata
    • H04N726
    • G06F17/148H04N19/635H04N19/80
    • An data processing apparatus for performing signal processing on an input signal having a finite length. The apparatus performs a wavelet transform to divide the input signal into sub-bands for signal processing. An extrapolation process is performed to limit transform artifacts at the leading and trailing ends of each sub-band of the finite length signal. An extrapolation processing discriminator is used to determine whether the extrapolation process satisfies a complete reconstruction condition, whereby an output signal will be a substantial reconstruction of the input signal. The extrapolation process is chosen from among four different loopback methods.
    • 一种用于对具有有限长度的输入信号进行信号处理的数据处理装置。 该装置执行小波变换以将输入信号划分成用于信号处理的子带。 执行外推处理以限制有限长度信号的每个子带的前端和后端的变换伪像。 使用外推处理鉴别器来确定外插过程是否满足完整的重建条件,由此输出信号将是输入信号的实质重建。 外插过程选自四种不同的环回方法。