User-guided surface reconstruction
    62.
    发明授权
    User-guided surface reconstruction 有权
    用户指导表面重建

    公开(公告)号:US09245382B2

    公开(公告)日:2016-01-26

    申请号:US12245709

    申请日:2008-10-04

    IPC分类号: G06T15/00 G06T17/00

    摘要: Described is a technology by which a user interacts with a surface representative of a point cloud data to correct for imperfect scan data. The surface is reconstructed based on the interaction. Real time viewing of the image is facilitated by parallel surface reconstruction. For example, the user may draw strokes to reduce topological ambiguities in poorly-sampled areas. An algorithm automatically adds new oriented sample points to the original point cloud based on the user interaction. Then a new isosurface is generated for the augmented point cloud. The user also may specify the geometry of missing areas of the surface. The user copies a set of points from another point cloud, and places the points around the target area. A new isosurface is then generated.

    摘要翻译: 描述了用户与表示点云数据的表面进行交互以校正不完美扫描数据的技术。 基于交互重建表面。 通过平行表面重建,实现了图像的实时观察。 例如,用户可以绘制笔画以减少不良采样区域的拓扑模糊。 基于用户交互,算法会自动将新的定向采样点添加到原始点云。 然后为增强点云生成一个新的等值面。 用户还可以指定表面缺失区域的几何形状。 用户从另一个点云复制一组点,并将点放在目标区域周围。 然后生成新的等值面。

    Shape deformation
    64.
    发明授权
    Shape deformation 有权
    形状变形

    公开(公告)号:US07843467B2

    公开(公告)日:2010-11-30

    申请号:US11612391

    申请日:2006-12-18

    IPC分类号: G09G5/00

    CPC分类号: G06T3/0093 G06T13/80

    摘要: A method and system is provided for deforming a shape of an image. In one example, an input is received for deforming a displayed shape, the shape including a boundary polygon or outline contour and a local area within the outline contour. The local area may further include vertices and edges. During deformation, an energy function corresponding to the outline contour and the local area may be determined and reduced or minimized. Positioning of the vertices and lengths of the edges may be determined based on the energy function or preservation of coordinates associated with the outline contour and the local area.

    摘要翻译: 提供了用于使图像的形状变形的方法和系统。 在一个示例中,接收用于使所显示的形状变形的输入,该形状包括轮廓轮廓内的边界多边形或轮廓轮廓和局部区域。 局部区域还可以包括顶点和边缘。 在变形期间,可以确定和减小或减小对应于轮廓轮廓和局部区域的能量函数。 可以基于能量函数或与轮廓轮廓和局部区域相关联的坐标的保持来确定边缘的顶点和长度的定位。

    OCTREE CONSTRUCTION ON GRAPHICS PROCESSING UNITS
    65.
    发明申请
    OCTREE CONSTRUCTION ON GRAPHICS PROCESSING UNITS 有权
    图形处理单元的构造

    公开(公告)号:US20100082703A1

    公开(公告)日:2010-04-01

    申请号:US12240973

    申请日:2008-09-29

    IPC分类号: G06F17/30 G06F7/06

    CPC分类号: G06F17/30961

    摘要: An octree GPU construction system and method for constructing a complete octree data structure on a graphics processing unit (GPU). Embodiments of the octree GPU construction system and method first defines a complete octree data structure as forming a complete partition of the 3-D space and including a vertex, edge, face, and node arrays, and neighborhood information. Embodiments of the octree GPU construction system and method input a point cloud and construct a node array. Next, neighboring nodes are computed for each of the nodes in the node arrays by using at least two pre-computed look-up tables (such as a parent look-up table and a child look-up table). Embodiments of the octree GPU construction system and method then use the neighboring nodes and neighborhood information to compute a vertex array, edge array, and face array are computed by determining owner information and self-ownership information based on the neighboring nodes.

    摘要翻译: 用于在图形处理单元(GPU)上构造完整八叉树数据结构的八叉树GPU构造系统和方法。 八叉树GPU构造系统和方法的实施例首先将完整的八叉树数据结构定义为形成3-D空间的完整分区并且包括顶点,边缘,面和节点阵列以及邻域信息。 八叉树GPU构造系统和方法的实施例输入点云并构造节点阵列。 接下来,通过使用至少两个预先计算的查询表(诸如父查询表和子查找表)来计算节点阵列中的每个节点的相邻节点。 八叉树GPU构造系统和方法的实施例然后通过基于相邻节点确定所有者信息和自身所有权信息来计算相邻节点和邻域信息来计算顶点阵列,边缘阵列和面部阵列。

    RAY TRACING ON GRAPHICS HARDWARE USING KD-TREES
    66.
    发明申请
    RAY TRACING ON GRAPHICS HARDWARE USING KD-TREES 有权
    使用KD-TREES对图形硬件进行RAY跟踪

    公开(公告)号:US20100079451A1

    公开(公告)日:2010-04-01

    申请号:US12241044

    申请日:2008-09-30

    IPC分类号: G06T17/00 G06T15/50

    CPC分类号: G06T15/06 G06T17/005

    摘要: Described is a technology by which a ray tracer incorporates a GPU-based kd-tree builder for rendering arbitrary dynamic scenes. For each frame, the ray tracer builds a kd-tree for the scene geometry. The ray tracer spawns and traces eye rays, reflective and refractive rays, and shadow rays. For each ray to be traced, the ray tracer walks through the kd-tree until it reaches leaf nodes and associated triangles. When a ray passes through both sides of a splitting plane, the “far” sub-tree is pushed into the stack and the “near” sub-tree is traversed first.

    摘要翻译: 描述了一种技术,通过该技术,射线跟踪器结合了用于渲染任意动态场景的基于GPU的kd-tree构建器。 对于每个帧,光线跟踪器为场景几何构建一个kd-tree。 射线追踪器产生并追踪眼睛的光线,反射和折射光线以及阴影线。 对于要跟踪的每条光线,光线跟踪器穿过kd树,直到它到达叶节点和相关联的三角形。 当光线穿过分裂平面的两侧时,“远”子树被推入堆叠中,并且首先遍历“近”子树。

    Interactive Relighting of Dynamic Refractive Objects
    67.
    发明申请
    Interactive Relighting of Dynamic Refractive Objects 审中-公开
    动态折射物体的相互作用

    公开(公告)号:US20100033482A1

    公开(公告)日:2010-02-11

    申请号:US12189763

    申请日:2008-08-11

    IPC分类号: G06T17/00

    CPC分类号: G06T15/06 G06T15/50

    摘要: Dynamic refractive object relighting technique embodiments are presented which involve rendering an image of a refractive object in a dynamic scene by first voxelizing a representation of the surfaces of the object into a volumetric representation in the form of a rectangular voxel grid. A refractive index is assigned to each voxel based on user-input material parameters. Next, the paths of photons are traced in a step-wise manner as each photon refracts through the object. The size of each step forward is variable and based on variations in refractive index of the object. Radiance values are assigned to all the voxels that the photons traverse in their paths through the object. An output image of the refractive object is then rendered from a user-input viewpoint by tracing viewing rays from the viewpoint into the scene and calculating the amount of radiance that reaches the viewpoint along each of the rays.

    摘要翻译: 提出了一种动态折射物体重心技术实施例,其包括通过首先将物体表面的表示体视为矩形体素网格形式的体积表示来在动态场景中渲染折射物体的图像。 基于用户输入的材料参数将折射率分配给每个体素。 接下来,当每个光子通过物体折射时,以逐步的方式跟踪光子的路径。 前进的每一步的大小是可变的,并且基于物体的折射率的变化。 辐射值被分配给光子穿过对象的路径中遍历的所有体素。 然后,通过将从视点观看的光线追踪到场景中并且计算沿着每个光线到达视点的辐射量,从用户输入的视点来渲染折射物体的输出图像。

    SPHERICAL HARMONICS SCALING
    68.
    发明申请
    SPHERICAL HARMONICS SCALING 有权
    球形谐波缩放

    公开(公告)号:US20080143719A1

    公开(公告)日:2008-06-19

    申请号:US11612394

    申请日:2006-12-18

    IPC分类号: G06T15/50

    CPC分类号: G06T15/55

    摘要: A method, device and system is provided for providing global illumination of a scene. For example, global illumination may be provided in a rendered 3-dimensional image that may contain objects and/or light sources. Radiance functions or visibility functions may further be represented by scaling of spherical harmonics functions in the spherical harmonics domain. For example, scaling of spherical harmonics coefficients corresponding to a spherical function may be performed based on a spherical harmonics scaling transformation matrix based on an angular scaling function.

    摘要翻译: 提供了一种用于提供场景的全局照明的方法,装置和系统。 例如,可以在可以包含对象和/或光源的渲染的三维图像中提供全局照明。 亮度函数或可见度函数可以进一步通过球面谐波域中的球谐函数的缩放来表示。 例如,可以基于基于角度缩放函数的球面谐波缩放变换矩阵来执行对应于球面函数的球谐函数的缩放。

    SHAPE DEFORMATION
    69.
    发明申请
    SHAPE DEFORMATION 有权
    形状变形

    公开(公告)号:US20080143711A1

    公开(公告)日:2008-06-19

    申请号:US11612391

    申请日:2006-12-18

    IPC分类号: G06T17/00

    CPC分类号: G06T3/0093 G06T13/80

    摘要: A method and system is provided for deforming a shape of an image. In one example, an input is received for deforming a displayed shape, the shape including a boundary polygon or outline contour and a local area within the outline contour. The local area may further include vertices and edges. During deformation, an energy function corresponding to the outline contour and the local area may be determined and reduced or minimized. Positioning of the vertices and lengths of the edges may be determined based on the energy function or preservation of coordinates associated with the outline contour and the local area.

    摘要翻译: 提供了用于使图像的形状变形的方法和系统。 在一个示例中,接收用于使所显示的形状变形的输入,该形状包括轮廓轮廓内的边界多边形或轮廓轮廓和局部区域。 局部区域还可以包括顶点和边缘。 在变形期间,可以确定和减小或减小对应于轮廓轮廓和局部区域的能量函数。 可以基于能量函数或与轮廓轮廓和局部区域相关联的坐标的保持来确定边缘的顶点和长度的定位。

    Method for correcting image distortion and system, and magnetic resonance imaging equipment
    70.
    发明授权
    Method for correcting image distortion and system, and magnetic resonance imaging equipment 有权
    校正图像失真和系统的方法以及磁共振成像设备

    公开(公告)号:US09404987B2

    公开(公告)日:2016-08-02

    申请号:US13872292

    申请日:2013-04-29

    申请人: Kun Zhou

    发明人: Kun Zhou

    IPC分类号: G01R33/565 G01R33/563

    摘要: In a method for an apparatus correcting image distortion in diffusion-weighted echo-planar magnetic resonance imaging, a marker sequence is applied before a diffusion-weighted echo planar imaging sequence, to form a combined sequence. The combined sequence is used to obtain marked images with different preset b values and different preset diffusion directions. The diffusion-weighted echo planar imaging sequence is used to obtain diffusion-weighted echo planar images with the same b values and diffusion directions as the marked images. A stretching coefficient and a displacement coefficient are calculated for each image data column of the diffusion-weighted echo planar image. The stretching coefficient and displacement coefficient are used to correct the diffusion-weighted echo planar images.

    摘要翻译: 在扩散加权回波平面磁共振成像中校正图像失真的装置的方法中,在扩散加权回波平面成像序列之前应用标记序列,以形成组合序列。 组合序列用于获得具有不同预设b值和不同预设扩散方向的标记图像。 扩散加权回波平面成像序列用于获得具有与标记图像相同的b值和扩散方向的扩散加权回波平面图像。 对扩散加权回波平面图像的每个图像数据列计算拉伸系数和位移系数。 拉伸系数和位移系数用于校正扩散加权回波平面图像。