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    • 64. 发明申请
    • LOW-DIMENSIONAL RANK-1 LATTICES IN COMPUTER IMAGE SYNTHESIS
    • 计算机图像合成中的低维RANK-1谱图
    • US20090244084A1
    • 2009-10-01
    • US12416236
    • 2009-04-01
    • Sabrina DammertzHolger DammertzAlexander Keller
    • Sabrina DammertzHolger DammertzAlexander Keller
    • G09G5/00
    • G06T11/001G06T1/60
    • Methods, systems and computer program code (software) products executable in a digital processor operable to generate a synthetic image include (1) selecting a rank-1 lattice in accordance with a maximized minimum distance function (max-min-dist lattice) corresponding to points in the synthetic image to be generated, (2) generating a data structure for efficient access of data stored in points of the rank-1 lattice, the data structure including the number n of lattice points, generator vector g, s basis vectors, and indices of the basis vectors, wherein the basis vectors are lattice points, and (3) generating, using the rank-1 lattice, digital output representative of a synthetic image, wherein the generating includes using the layout of rank-1 lattice points to represent textures of arbitrary dimension.
    • 在可操作以产生合成图像的数字处理器中可执行的方法,系统和计算机程序代码(软件)产品包括(1)根据对应于最大化最小距离函数(max-min-dist lattice)的最大化最小距离函数 要生成的合成图像中的点,(2)生成用于有效访问存储在Rank-1格点的数据的数据结构,包括格点数n,包括生成矢量g,s基矢量的数据结构, 和基矢量的索引,其中基矢量是格点,以及(3)使用等级-1格格生成表示合成图像的数字输出,其中所述生成包括使用rank-1格点的布局 代表任意维度的纹理。
    • 67. 发明申请
    • SYSTEM AND METHOD FOR GENERATING PIXEL VALUES FOR PIXELS IN AN IMAGE USING STRICTLY DETERMINISTIC METHODOLOGIES FOR GENERATING SAMPLE POINTS
    • 使用严格决定性方法生成样本点的图像中的像素生成像素值的系统和方法
    • US20090147002A1
    • 2009-06-11
    • US12272005
    • 2008-11-17
    • Alexander Keller
    • Alexander Keller
    • G06T15/50
    • G06T15/06G06T15/506G06T15/55
    • A computer graphics system generates a pixel value for a pixel in an image, the pixel being representative of a point in a scene as recorded on an image plane of a simulated camera. The computer graphics system comprises a sample point generator and a function evaluator. The sample point generator is configured to generate a set of sample points representing at least one simulated element of the simulated camera, the sample points representing elements of, illustratively, for sample points on the image plane, during time intervals during which the shutter is open, and on the lens, a Hammersley sequence, and, for use in global illumination, a scrambled Halton sequence. The function evaluator is configured to generate at least one value representing an evaluation of a selected function at sample points generated by the sample point generator, those values corresponding to the pixel value.
    • 计算机图形系统为图像中的像素生成像素值,该像素代表记录在模拟相机的图像平面上的场景中的点。 计算机图形系统包括采样点发生器和功能评估器。 采样点发生器被配置为在快门打开的时间间隔期间生成表示模拟相机的至少一个模拟元素的采样点集合,采样点表示例如图像平面上的采样点的元素 ,并且在镜头上是Hammersley序列,并且在全局照明中使用加扰的Halton序列。 功能评估器被配置为在由采样点发生器产生的采样点处产生表示所选择的函数的评估的至少一个值,对应于像素值的那些值。
    • 70. 发明授权
    • Generating images using ray tracing and ray tree generated using low-discrepancy sequences
    • 使用光线跟踪和使用低差异序列生成的射线树生成图像
    • US07358971B2
    • 2008-04-15
    • US11676796
    • 2007-02-20
    • Alexander Keller
    • Alexander Keller
    • G06T17/00
    • G06T15/506G06T15/06G06T15/55
    • Computer graphics apparatus, methods and systems and program products operable to generate and display human-perceptible images, comprise a ray tracer operable to generate a ray tree, the ray tree comprising a primary ray shot along a selected direction and a plurality of other rays, the other rays being generated by recursive splitting. A ray is split when it encounters a predetermined condition, and each of the rays into which it is split is directed along a selected direction. The ray tracer comprises a low-discrepancy sequence generator an condition detector and a ray generator. The low-discrepancy sequence generator is configured to generate elements of at least one low-discrepancy sequence. The condition detector is configured to determine, for one of the rays in the ray tree, whether the one of the rays encounters the predetermined condition. The ray generator is configured to, when the condition detector makes a positive determination in connection with the one of the rays, generate a selected number “M” of split rays each along a splitting, direction determined by a respective direction value.
    • 可操作以产生和显示人类可感知图像的计算机图形装置,方法和系统和程序产品包括可操作以产生射线树的射线追踪器,所述射线树包括沿所选方向的一次射线射线和多个其它射线, 其他光线是通过递归分割生成的。 当遇到预定条件时,射线被分裂,并且其中被分裂的射线中的每个射线沿选定的方向被引导。 射线追踪器包括一个低差异序列发生器,一个条件检测器和一个射线发生器。 低差异序列发生器被配置为生成至少一个低差异序列的元素。 条件检测器被配置为针对射线树中的一个射线确定射线中的一个是否遇到预定条件。 射线发生器被配置为当条件检测器与一条光线相结合时确定正确时,沿着由相应的方向值确定的分割方向产生分割光线的选定数量“M”。