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    • 8. 发明授权
    • High dynamic range image hallucination
    • 高动态范围图像幻象
    • US08346002B2
    • 2013-01-01
    • US11781227
    • 2007-07-20
    • Li-Yi WeiKun ZhouBaining GuoHeung-Yeung ShumLvdi Wang
    • Li-Yi WeiKun ZhouBaining GuoHeung-Yeung ShumLvdi Wang
    • G06K9/00
    • G06T5/008
    • An apparatus and method provide for providing an output image from an input image. The input image may contain at least one portion that does not display certain desired information of the image, such as texture information. The desired information may be obtained from a second portion of the input image and applied to the at least one portion that does not contain the texture information or contains a diminished amount of the texture information. Also, at least one characteristic of the second portion of the input image may not be applied to the at least one portion such as illumination information. In another example, the input image may be decomposed into multiple parts such as a high frequency and a low frequency component. Each component may be hallucinated individually or independently and combined to form the output image.
    • 一种设备和方法提供从输入图像提供输出图像。 输入图像可以包含不显示图像的某些所需信息的至少一个部分,例如纹理信息。 可以从输入图像的第二部分获得期望的信息,并将其应用于不包含纹理信息的至少一个部分或者包含纹理信息的减少量。 此外,输入图像的第二部分的至少一个特征可以不被应用于诸如照明信息的至少一个部分。 在另一示例中,输入图像可以被分解成多个部分,例如高频和低频分量。 每个组件可以单独地或独立地幻影,并组合以形成输出图像。
    • 9. 发明申请
    • Real-Time Rendering of Light-Scattering Media
    • 光散射介质的实时渲染
    • US20090006052A1
    • 2009-01-01
    • US11770974
    • 2007-06-29
    • Kun ZhouQiming HouMinmin GongJohn Michael SnyderBaining GuoHeung-Yeung Shum
    • Kun ZhouQiming HouMinmin GongJohn Michael SnyderBaining GuoHeung-Yeung Shum
    • G06G7/48
    • G06T15/50
    • A real-time algorithm for rendering of an inhomogeneous scattering medium such as fog with a surface object immersed therein is described. An input media animation is represented as a sequence of density fields. The algorithm computes surface reflectance of the surface object in the inhomogeneous scattering medium. The algorithm may also compute airlight of the inhomogeneous scattering medium. Several approximations are taken which lead to analytical solutions of quantities such as optical depth integrations and single scattering integrations, and a reduced number of integrations that need to be calculated. The resultant algorithm is able to render inhomogeneous media including their shadowing and scattering effects in the real time. The algorithm may be adopted for a variety of light sources including point lights and environmental lights.
    • 描述了用于渲染非均匀散射介质(例如,其中浸入表面物体的雾)的实时算法。 输入媒体动画被表示为一系列密度字段。 该算法计算非均匀散射介质中表面物体的表面反射率。 该算法还可以计算不均匀散射介质的空气光。 采用几种近似方法,其导致诸如光学深度积分和单一散射积分的量的分析解,以及需要计算的减少的积分数。 所得到的算法能够实时渲染包括它们的阴影和散射效果的非均匀介质。 该算法可以用于各种光源,包括点光源和环境光源。
    • 10. 发明授权
    • Real-time rendering of light-scattering media
    • 实时渲染光散射介质
    • US08190403B2
    • 2012-05-29
    • US11830794
    • 2007-07-30
    • Kun ZhouZhong RenStephen Ssu-te LinBaining GuoHeung-Yeung Shum
    • Kun ZhouZhong RenStephen Ssu-te LinBaining GuoHeung-Yeung Shum
    • G06F17/10
    • G06T15/55
    • A real-time algorithm for rendering of an inhomogeneous scattering media such as smoke under dynamic low-frequency environment lighting is described. An input media animation is represented as a sequence of density fields, each of which is decomposed into a weighted sum of a set of radial basis functions (RBFs) and an optional residual field. Source radiances from single and optionally multiple scattering are directly computed at only the RBF centers and then approximated at other points in the volume using an RBF-based interpolation. Unique approximation techniques are introduced in the computational algorithms to simplify and speed up the computation of source radiance contributed by single and multiple scattering. Using the computed source radiances, a ray marching technique using slice-based integration of radiance along each viewing ray may be performed to render the final image.
    • 描述了在动态低频环境照明下渲染非均匀散射介质(如烟雾)的实时算法。 输入媒体动画被表示为密度字段序列,每个密度字段被分解成一组径向基函数(RBF)和可选残余字段的加权和。 仅从RBF中心直接计算来自单个和任选多个散射的源辐射,然后使用基于RBF的插值在体积中的其他点处近似。 在计算算法中引入了独特的近似技术,以简化和加快由单次和多次散射贡献的源辐射的计算。 使用计算的源辐射,可以执行使用沿着每个观察射线的基于片段的辐射积分的射线行进技术来渲染最终图像。