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    • 7. 发明授权
    • Digital processing method and system for determination of optical flow
    • 用于确定光流的数字处理方法和系统
    • US08712095B2
    • 2014-04-29
    • US13905592
    • 2013-05-30
    • Spinella IP Holdings, Inc.
    • William L. Gaddy
    • G06K9/00H04N11/02
    • G06T7/20G06T7/207G06T7/269G06T2207/10016G06T2207/20016
    • A method and system for determining an optical flow field between a pair of images is disclosed. Each of the pair of images is decomposed into image pyramids using a non-octave pyramid factor. The pair of decomposed images is transformed at a first pyramid scale to second derivative representations under an assumption that a brightness gradient of pixels in the pair of decomposed images is constant. Discrete-time derivatives of the second derivative image representations are estimated. An optical flow estimation process is applied to the discrete-time derivatives to produce a raw optical flow field. The raw optical flow field is scaled by the non-octave pyramid factor. The above-cited steps are repeated for the pair of images at another pyramid scale until all pyramid scales have been visited to produce a final optical flow field, wherein spatiotemporal gradient estimations are warped by a previous raw optical flow estimation.
    • 公开了一种用于确定一对图像之间的光流场的方法和系统。 使用非八度金字塔因子将这对图像中的每一个图像分解成图像金字塔。 在一对分解图像中的像素的亮度梯度恒定的假设下,将一对分解图像以第一金字塔标尺变换为二进制表示。 估计二阶导数图像表示的离散时间导数。 将光流估计过程应用于离散时间导数以产生原始光流场。 原始光流场由非八度金字塔因子缩放。 对于另一个金字塔尺度的一对图像重复上述步骤,直到所有金字塔刻度被访问以产生最终的光流场,其中时间梯度估计由先前的原始光流估计扭曲。
    • 8. 发明授权
    • System and method for histogram computation using a graphics processing unit
    • 使用图形处理单元进行直方图计算的系统和方法
    • US08704842B1
    • 2014-04-22
    • US13944159
    • 2013-07-17
    • Spinella IP Holdings, Inc.
    • William L. GaddyVidhya SeranStephen NowalkYong LiuChidambaram Ramanathan
    • G09G5/00
    • G06T1/20G06F17/18G06T2200/28
    • A method and system for obtaining a histogram and related statistical values from a data set of texels is disclosed. A processing device receives from a first buffer, a data set of texels. The data set has a dimensionality D of at least two and each texel contains a value. The processing device sorts the data set into a point list of coordinates, wherein a point in the point list corresponds to a texel location in the data set. The processing device reduces the dimensionality of the point list by arranging points in the point list according to an N−1 dimensional dominancy. The processing device performs a raster operation on each associated value of the arranged points to obtain at least one value. The processing device is to output the at least one value to a second buffer. The processing device may be a graphics processing unit.
    • 公开了一种从纹理数据集获得直方图和相关统计值的方法和系统。 处理设备从第一缓冲器接收纹理数据集。 数据集的维数D至少为2,每个纹素包含一个值。 处理设备将数据集排序成坐标点列表,其中点列表中的点对应于数据集中的纹素位置。 处理装置通过根据N-1维统一排列点列表中的点来降低点列表的维度。 处理装置对排列点的每个相关值执行光栅操作以获得至少一个值。 处理装置将至少一个值输出到第二缓冲器。 处理装置可以是图形处理单元。
    • 9. 发明申请
    • DIGITAL PROCESSING METHOD AND SYSTEM FOR DETERMINATION OF OPTICAL FLOW
    • 数字处理方法和光流测定系统
    • US20130259317A1
    • 2013-10-03
    • US13905592
    • 2013-05-30
    • SPINELLA IP HOLDINGS, INC.
    • William L. Gaddy
    • G06T7/20
    • G06T7/20G06T7/207G06T7/269G06T2207/10016G06T2207/20016
    • A method and system for determining an optical flow field between a pair of images is disclosed. Each of the pair of images is decomposed into image pyramids using a non-octave pyramid factor. The pair of decomposed images is transformed at a first pyramid scale to second derivative representations under an assumption that a brightness gradient of pixels in the pair of decomposed images is constant. Discrete-time derivatives of the second derivative image representations are estimated. An optical flow estimation process is applied to the discrete-time derivatives to produce a raw optical flow field. The raw optical flow field is scaled by the non-octave pyramid factor. The above-cited steps are repeated for the pair of images at another pyramid scale until all pyramid scales have been visited to produce a final optical flow field, wherein spatiotemporal gradient estimations are warped by a previous raw optical flow estimation.
    • 公开了一种用于确定一对图像之间的光流场的方法和系统。 使用非八度金字塔因子将这对图像中的每一个图像分解成图像金字塔。 在一对分解图像中的像素的亮度梯度恒定的假设下,将一对分解图像以第一金字塔标尺变换为二进制表示。 估计二阶导数图像表示的离散时间导数。 将光流估计过程应用于离散时间导数以产生原始光流场。 原始光流场由非八度金字塔因子缩放。 对于另一个金字塔尺度的一对图像重复上述步骤,直到所有金字塔刻度被访问以产生最终的光流场,其中时间梯度估计由先前的原始光流估计扭曲。