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    Low-Complexity Film Grain Simulation Technique
    5.
    发明申请
    Low-Complexity Film Grain Simulation Technique 有权
    低复杂度电影粒度模拟技术

    公开(公告)号：US20080152250A1

    公开(公告)日：2008-06-26

    申请号：US11667846

    申请日：2005-09-26

    Applicant: Cristina Gomila ,  Joan Llach ,  Jeffrey Allen Cooper

    Inventor： Cristina Gomila ,  Joan Llach ,  Jeffrey Allen Cooper

    IPC: G06K9/40

    CPC classification number: G06T5/10 ,  G06T5/002 ,  G06T2207/10016 ,  G06T2207/20052 ,  G06T2207/20204 ,  H04N19/46 ,  H04N19/467 ,  H04N19/85

    Abstract: 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.

    Abstract translation: 视频图像中的胶片颗粒的模拟是通过首先为一组切割频率f LF，V V L和V L而产生变换系数的块（即，矩阵阵列） ，f H HH和f V H H N，与期望的颗粒图案相关联。 （截止频率f L HL，f VL，f HH和f H V H表示截止频率，在 表示所需胶片颗粒图案的过滤器的两个尺寸）。 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。

    Methods, apparatus and system for film grain simulation
    9.
    发明授权
    Methods, apparatus and system for film grain simulation 有权
    胶片颗粒模拟的方法，装置和系统

    公开(公告)号：US08014558B2

    公开(公告)日：2011-09-06

    申请号：US11246474

    申请日：2005-10-07

    Applicant: Jeffrey Allen Cooper ,  Joan Llach ,  Cristina Gomila

    Inventor： Jeffrey Allen Cooper ,  Joan Llach ,  Cristina Gomila

    IPC: G06K9/00

    CPC classification number: G06T5/002 ,  G06F17/30784 ,  G06T2207/10016 ,  G06T2207/20204 ,  G11B27/031 ,  H04N5/775 ,  H04N9/8715 ,  H04N19/423 ,  H04N19/44 ,  H04N19/46 ,  H04N19/467 ,  H04N19/85

    Abstract: The present invention provides a method, apparatus and system for providing fast access to film grain patterns in a film grain simulation process including providing a first memory storing at least one film grain pattern and in response to a film grain pattern required by the film grain simulation process not being stored in the first memory, updating the first memory to obtain at least the required film grain pattern from at least a second memory. In one embodiment, the first memory is a local cache, the second memory is a film grain pattern database and a controller causes the examination of the local cache for a particular film grain pattern required in the film grain simulation process. In response to the required film grain pattern not being stored in the local cache, the controller causes the update of the local cache using the film grain pattern database.

    Abstract translation: 本发明提供了一种用于在胶片颗粒模拟过程中提供对胶片颗粒图案的快速访问的方法，装置和系统，包括提供存储至少一个胶片颗粒图案的第一存储器和响应于胶片颗粒模拟所需的胶片颗粒图案 处理不被存储在第一存储器中，更新第一存储器以从至少第二存储器获得至少所需的胶片颗粒图案。 在一个实施例中，第一存储器是本地高速缓存，第二存储器是胶片颗粒图案数据库，并且控制器对胶片颗粒模拟过程中所需的特定胶片颗粒图案的本地高速缓存进行检查。 响应于所需的胶片颗粒图案不存储在本地高速缓存中，控制器使用胶片颗粒图案数据库来使本地高速缓存更新。

    Method and apparatus for reading film grain patterns in a raster order in film grain simulation
    10.
    发明授权
    Method and apparatus for reading film grain patterns in a raster order in film grain simulation 有权
    在胶片颗粒模拟中以光栅顺序读取胶片颗粒图案的方法和装置

    公开(公告)号：US07982743B2

    公开(公告)日：2011-07-19

    申请号：US11251696

    申请日：2005-10-17

    Applicant: Jeffrey Allen Cooper ,  Joan Llach ,  Cristina Gomila

    Inventor： Jeffrey Allen Cooper ,  Joan Llach ,  Cristina Gomila

    IPC: G09G5/00

    CPC classification number: G06T5/002 ,  G06F17/30784 ,  G06T2207/10016 ,  G06T2207/20204 ,  G11B27/031 ,  H04N5/775 ,  H04N9/8715 ,  H04N19/423 ,  H04N19/44 ,  H04N19/46 ,  H04N19/467 ,  H04N19/85

    Abstract: The present invention provides a method and apparatus for reading film grain patterns in a raster order in film grain simulation including establishing a pseudo-random starting position, repeating the pseudo-random starting position for each line of a group of film grain blocks, and using a different pseudo-random starting position for each display line of a next group of film grain blocks. In various embodiments of the present invention, the different pseudo-random starting positions are triggered by resetting at least one seed value of a pseudo-random number generator implemented to determine said pseudo-random starting positions.

    Abstract translation: 本发明提供了一种用于在胶片颗粒模拟中以光栅顺序读取胶片颗粒图案的方法和装置，包括建立伪随机开始位置，重复一组胶片颗粒块的每一行的伪随机起始位置，以及使用 对于下一组胶片颗粒块的每个显示线的不同的伪随机开始位置。 在本发明的各种实施例中，不同的伪随机起始位置通过复位实现以确定所述伪随机起始位置的伪随机数发生器的至少一个种子值来触发。

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