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    Low-complexity film grain simulation technique
    26.
    发明授权
    Low-complexity film grain simulation technique 有权
    低复杂度胶片颗粒模拟技术

    公开(公告)号：US08472526B2

    公开(公告)日：2013-06-25

    申请号：US11667846

    申请日：2005-09-26

    申请人： Cristina Gomila ,  Joan Llach ,  Jeffrey Allen Cooper

    发明人： Cristina Gomila ,  Joan Llach ,  Jeffrey Allen Cooper

    IPC分类号： H04N11/02

    CPC分类号： G06T5/10 ,  G06T5/002 ,  G06T2207/10016 ,  G06T2207/20052 ,  G06T2207/20204 ,  H04N19/46 ,  H04N19/467 ,  H04N19/85

    摘要： The simulation of film grain in a video image occurs by first creating a block (i.e., a matrix array) of transformed coefficients for a set of cut frequencies fHL, fVL, fHH and fVH associated with a desired grain pattern. (The cut frequencies fHL, fVL, fHH and fVH represent cut-off frequencies, in two dimensions, of a filter that characterizes the desired film grain pattern). The block of transformed coefficients undergoes an inverse transform to yield a bit-accurate film grain sample and the bit accurate sample undergoes scaling to enable blending with a video signal to simulate film grain in the signal.

    摘要翻译： 视频图像中的胶片颗粒的模拟通过首先为与期望的颗粒图案相关联的一组切割频率fHL，fVL，fHH和fVH创建变换系数的块（即，矩阵阵列）而发生。 （切割频率fHL，fVL，fHH和fVH表示二维特征所需胶片颗粒图案的滤光片的截止频率）。 变换后的系数块进行逆变换以产生位精确的胶片颗粒样品，并且比特精确的样本进行缩放以使得能够与视频信号混合以模拟信号中的胶片颗粒。

    Film Grain Simulation Method Based on Pre-Computed Transform Coefficients
    28.
    发明申请
    Film Grain Simulation Method Based on Pre-Computed Transform Coefficients 有权
    基于预计算变换系数的胶片粒度模拟方法

    公开(公告)号：US20070297515A1

    公开(公告)日：2007-12-27

    申请号：US11667581

    申请日：2005-10-26

    申请人： Cristina Gomila ,  Joan Llach

    发明人： Cristina Gomila ,  Joan Llach

    IPC分类号： H04N11/02

    CPC分类号： G06T5/002 ,  G06T5/10 ,  G06T2207/10016 ,  G06T2207/20052 ,  G06T2207/20204 ,  H04N19/117 ,  H04N19/136 ,  H04N19/176 ,  H04N19/46 ,  H04N19/80 ,  H04N19/85

    摘要： Film grain simulation within a receiver 4 occurs by first obtaining at least one block of pre-computed transformed coefficients. The block of pre-computed transformed coefficients undergoes filtering responsive to a frequency range that characterizes a desired pattern of the film grain. In practice, the frequency range lies within a set of cut frequencies fHL, fVL, fHH and fVH of a filter in two dimensions that characterizes a desired film grain pattern. Thereafter, the filtered set of coefficients undergoes an inverse transform to yield the film grain pattern.

    摘要翻译： 通过首先获得至少一个预先计算的变换系数块，发生接收机4内的胶片颗粒模拟。 预先计算的变换系数的块根据表征胶片颗粒的期望图案的频率范围进行滤波。 在实践中，频率范围在一组切割频率f LF，f V L，f H HH和f V H， SUB>滤光器，其特征在于所需的胶片颗粒图案。 此后，经滤波的系数组经过逆变换以产生胶片颗粒图案。