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    Bidirectional point distribution functions for rendering granular media
    1.
    发明授权
    Bidirectional point distribution functions for rendering granular media 有权
    用于渲染粒度介质的双向点分布函数

    公开(公告)号：US09472016B2

    公开(公告)日：2016-10-18

    申请号：US13842204

    申请日：2013-03-15

    申请人： Wojciech Jarosz ,  Johannes Meng ,  Marios Papas ,  Ralf Habel ,  Carsten Dachsbacher ,  Steve Marschner

    发明人： Wojciech Jarosz ,  Johannes Meng ,  Marios Papas ,  Ralf Habel ,  Carsten Dachsbacher ,  Steve Marschner

    IPC分类号： G06T15/06 ,  G06T15/50

    CPC分类号： G06T15/06 ,  G06T15/506

    摘要： The disclosure provides an approach for rendering granular media. According to one aspect of the disclosure, granular media are rendered using bidirectional point scattering distribution functions (BPSDFs). The dimensionality of BPSDFs may be reduced by making certain assumptions, such as random orientations of grains, thereby simplifying light transport for computational efficiency. To generate a BPSDF from a grain, light transport may be precomputed using a Monte Carlo simulation in which photons are shot onto the grain from all directions. The precomputed BPSDF may be used, during rendering, for describing the interactions within grains. When a light ray traced during rendering intersects proxy geometry which replaces grain geometry, the BPSDF may be evaluated to determine light transport. By repeating this process for many light rays in a Monte Carlo simulation, the light propagation through the granular medium may be determined.

    摘要翻译： 本公开提供了一种用于渲染粒状介质的方法。 根据本公开的一个方面，使用双向点散射分布函数（BPSDF）渲染粒状介质。 可以通过做出某些假设来减少BPSDF的维数，诸如颗粒的随机取向，从而简化了光传输的计算效率。 为了从颗粒生成BPSDF，可以使用蒙特卡罗模拟预先计算光传输，其中光子从所有方向被射击到颗粒上。 在渲染期间可以使用预先计算的BPSDF来描述谷物内的相互作用。 当渲染期间跟踪的光线与替代晶粒几何的代理几何相交时，可以评估BPSDF以确定光传输。 通过在蒙特卡洛模拟中对于许多光线重复该过程，可以确定通过粒状介质的光传播。

    METHOD OF FABRICATING TRANSLUCENT MATERIALS WITH DESIRED APPEARANCE
    2.
    发明申请
    METHOD OF FABRICATING TRANSLUCENT MATERIALS WITH DESIRED APPEARANCE 有权
    具有预期外观的制造透明材料的方法

    公开(公告)号：US20140198204A1

    公开(公告)日：2014-07-17

    申请号：US13935712

    申请日：2013-07-05

    申请人： Marios Papas ,  Christian Regg ,  Steve Marschner ,  Wojciech Jarosz ,  Wojciech Matusik ,  Philip J. Jackson ,  Bernd Bickel

    发明人： Marios Papas ,  Christian Regg ,  Steve Marschner ,  Wojciech Jarosz ,  Wojciech Matusik ,  Philip J. Jackson ,  Bernd Bickel

    IPC分类号： G01N21/47

    CPC分类号： G01N21/4738 ,  Y10T428/24942

    摘要： A method for creating a replication material corresponding to the appearance of a translucent or partially translucent target material. The appearance of the target material can be measured or may be prescribed by a user. The method includes receiving by a processor optical data related to a target subsurface scattering parameter of the target material. Once the processor has received the optical or light characteristic data, the method includes determining by the processor a replication pigment concentration to replicate the appearance of the target material caused by the target subsurface scattering parameter. The processor determines this concentration based on a plurality of pigment subsurface scattering parameters corresponding to a plurality of stored pigment concentrations in the computing device. Once the replication pigment concentration has been determined, the method includes creating, physically or virtually, the replication material by combining the pigment concentration with a base material.

    摘要翻译： 一种用于创建对应于半透明或部分半透明的目标材料的外观的复制材料的方法。 可以测量目标材料的外观，或者可以由用户规定。 该方法包括由处理器接收与目标材料的目标地下散射参数有关的光学数据。 一旦处理器接收到光学或光特性数据，该方法包括由处理器确定复制颜料浓度以复制由目标地下散射参数引起的目标材料的外观。 处理器基于对应于计算设备中多个储存的颜料浓度的多个颜料地下散射参数来确定该浓度。 一旦确定了复制颜料浓度，该方法包括通过将颜料浓度与基材组合来物理或虚拟地复制复制材料。

    Refractive steganography lens and method for determining milling plan for same
    5.
    发明授权
    Refractive steganography lens and method for determining milling plan for same 有权
    折射隐形镜及其相同方法

    公开(公告)号：US08964295B2

    公开(公告)日：2015-02-24

    申请号：US13470184

    申请日：2012-05-11

    申请人： Wojciech Jarosz ,  Marios Papas ,  Derek Nowrouzezahrai ,  Thomas Houit

    发明人： Wojciech Jarosz ,  Marios Papas ,  Derek Nowrouzezahrai ,  Thomas Houit

    IPC分类号： G02B27/10 ,  G03B21/60

    CPC分类号： G02B3/0043 ,  G02B27/0927

    摘要： Techniques are described for designing and manufacturing a refractive surface that produces a desired image when placed over a target image. The refractive lens surface may include a set of lens patches, each of which indexes a region on the source image to refract light from the indexed region to recreate a patch of the target image. And together, the lenses reproduce the target image. In one embodiment, the refractive geometry of the lens surface (i.e., the shape of each lens) is determined by formulating and efficiently determining a solution to an inverse light transport problem. The solution may account for additional constraints imposed by the physical manufacturing procedure. Doing so results in a design for a refractive surface amenable to milling (or other manufacturing process).

    摘要翻译： 描述了用于设计和制造当放置在目标图像上时产生期望图像的折射表面的技术。 折射透镜表面可以包括一组透镜贴片，每个透镜贴片对源图像上的区域进行索引以折射来自索引区域的光，以重新创建目标图像的贴片。 并在一起，镜头再现目标图像。 在一个实施例中，透镜表面的折射几何形状（即每个透镜的形状）通过配制和有效地确定逆光输送问题的解决方案来确定。 该解决方案可以解释由物理制造程序施加的附加约束。 这样做导致适合铣削（或其他制造工艺）的折射表面的设计。