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    Perception-based quality metrics for volume rendering
    3.
    发明申请
    Perception-based quality metrics for volume rendering 审中-公开
    基于感知的体绘制质量指标

    公开(公告)号：US20080012856A1

    公开(公告)日：2008-01-17

    申请号：US11800565

    申请日：2007-05-07

    申请人： Daphne Yu ,  Jeffrey P. Johnson ,  Mariappan S. Nadar ,  John S. Nafziger ,  Thomas Stingl

    发明人： Daphne Yu ,  Jeffrey P. Johnson ,  Mariappan S. Nadar ,  John S. Nafziger ,  Thomas Stingl

    IPC分类号： G06T17/00

    CPC分类号： G06T7/0012 ,  G06T2207/30004

    摘要： Perception-based visual quality metrics are used in volume rendering. A perception-based visual quality metric is measured from one or more three-dimensional representations. For example, people tend to notice edges, so a numeric value representing the noticeable edges is calculated. The perception-based metric is used for developing volume renderers, calibrating across different renderers, calibrating across different rendering platforms, determining rendering parameter values as a function of rendering speed, selecting rendering parameter values for a given situation, providing a range of rendering options associated with gradual perception changes, and/or combinations thereof. The perception-based visual quality metric provides a quantifiable representation of importance to the user for a given application, assisting optimization of volume rendering.

    摘要翻译： 基于感知的视觉质量度量用于体绘制。 从一个或多个三维表示测量基于感知的视觉质量度量。 例如，人们倾向于注意边缘，因此计算表示可见边缘的数值。 基于感知的度量用于开发体积渲染器，在不同渲染器之间进行校准，在不同的渲染平台之间进行校准，根据渲染速度确定渲染参数值，为给定情况选择渲染参数值，提供相关的渲染选项范围 具有逐渐的感知变化，和/或其组合。 基于感知的视觉质量度量为给定应用程序提供了对用户重要性的可量化表示，有助于体绘制的优化。

    Modular volume rendering using visual programming
    4.
    发明授权
    Modular volume rendering using visual programming 有权
    使用可视化编程进行模块化体绘制

    公开(公告)号：US08493388B2

    公开(公告)日：2013-07-23

    申请号：US11835508

    申请日：2007-08-08

    申请人： Matthieu Dederichs ,  Klaus Engel ,  Daphne Yu

    发明人： Matthieu Dederichs ,  Klaus Engel ,  Daphne Yu

    IPC分类号： G06T15/60

    CPC分类号： G06T15/00

    摘要： The rendering pipeline is divided into multiple components or modules in a scene graph based visual programming environment. Different stages of the rendering pipeline, such as data conversion, transform function, shading, and rendering, are grouped into independent conceptual modules, and each module is implemented by separate nodes in a scene graph. The user may select different nodes belonging to different modules for inclusion into the scene graph to program the rendering pipeline. The visual program is implicitly compiled and run using an application programming interface for hardware acceleration.

    摘要翻译： 渲染管线在基于场景图形的可视化编程环境中分为多个组件或模块。 渲染流水线的不同阶段（如数据转换，变换功能，阴影和渲染）分为独立的概念模块，每个模块由场景图中的单独节点实现。 用户可以选择属于不同模块的不同节点，以便包含在场景图中以对渲染管线进行编程。 可视化程序使用用于硬件加速的应用程序编程接口进行隐式编译和运行。

    SELECTIVE FLOW VISUALIZATION OF TRACED PARTICLES
    5.
    发明申请
    SELECTIVE FLOW VISUALIZATION OF TRACED PARTICLES 有权
    追踪颗粒的选择性流动可视化

    公开(公告)号：US20130038605A1

    公开(公告)日：2013-02-14

    申请号：US13556366

    申请日：2012-07-24

    申请人： Wei Li ,  Feng Qiu ,  Daphne Yu

    发明人： Wei Li ,  Feng Qiu ,  Daphne Yu

    IPC分类号： G09G5/00 ,  G06T15/00

    CPC分类号： G06T19/00 ,  G06F2217/16 ,  G06T2210/24

    摘要： A method for tracing a plurality of virtual particles through a flow filed includes receiving a flow field. A flow domain is divided into cells. Virtual particles are defined within the flow domain and values are collected for flow properties at each cell. A histogram is generated for each cell representing the collected flow properties for that corresponding cell. The histogram includes, for each of the one or more flow properties, a plurality of bins defining ranges of property values and a count of virtual particles within that cell that exhibit those properties. The histograms for the plurality of cells are advected with respect to the flow field over time. A graphical representation of the plurality of particles within the flow domain is rendered based on the advected histograms for the plurality of cells using a graphics processor.

    摘要翻译： 通过流场跟踪多个虚拟粒子的方法包括接收流场。 流域分为细胞。 在流域内定义虚拟粒子，并收集每个单元格下的流动属性值。 为表示该相应单元格的采集流特性的每个单元格生成直方图。 所述直方图针对所述一个或多个流特性中的每一个包括多个限定属性值的范围和显示所述属性的所述单元内的虚拟粒子的计数的箱。 随着时间的推移，多个单元格的直方图相对于流场平流。 基于使用图形处理器的多个单元的平流的直方图来呈现流域内的多个粒子的图形表示。

    Optimization and view dependency reduction for processing slice-based volumes
    6.
    发明授权
    Optimization and view dependency reduction for processing slice-based volumes 有权
    优化和查看处理基于片段卷的依赖关系

    公开(公告)号：US07826684B2

    公开(公告)日：2010-11-02

    申请号：US11337772

    申请日：2006-01-23

    申请人： Daphne Yu ,  Robert Schneider

    发明人： Daphne Yu ,  Robert Schneider

    IPC分类号： G06K9/32

    CPC分类号： G06T19/00 ,  G06T15/08 ,  G06T2219/008

    摘要： This invention describes an optimization and view dependency reduction method for multiplanar reformatting (MPR) of slice-based volume images. This method utilizes a traversal scheme that allows for efficient access of the computer memory layout of a sliced based volume, and therefore optimizes overall processing time. This method does not require changes to the volume memory layout or additional volume memory. Instead, efficient memory access is achieved by adaptive traversal patterns on the reformatting planes. The traversal pattern is adapted on-the-fly during rendering as the reformatting plane location and orientation is changed arbitrarily relative to the volume. In this way, the typical speed differences between various reformatting planes orientations caused by inefficient memory access is greatly reduced. Computer cache coherency, SIMD coherent implementation, and multiprocessing environments are also considered in the design of the traversal pattern.

    摘要翻译： 本发明描述了用于基于片的体积图像的多平面重新格式化（MPR）的优化和视图依赖性降低方法。 该方法利用遍历方案，允许有效访问基于片段的卷的计算机存储器布局，因此优化整个处理时间。 此方法不需要更改卷内存布局或额外的卷内存。 相反，通过重新格式化平面上的自适应遍历模式实现高效的存储器访问。 随着重新格式化平面位置和方向相对于卷的任意改变，遍历模式在渲染期间随时适应。 以这种方式，由于低效的存储器访问引起的各种重新格式化平面方向之间的典型速度差异大大降低。 在遍历模式的设计中也考虑了计算机缓存一致性，SIMD相干实现和多处理环境。

    Range-peeling for punching masks in volume rendering
    7.
    发明授权
    Range-peeling for punching masks in volume rendering 有权
    用于在体积渲染中冲压口罩的范围剥离

    公开(公告)号：US07773086B2

    公开(公告)日：2010-08-10

    申请号：US11687728

    申请日：2007-03-19

    申请人： Wei Li ,  Daphne Yu

    发明人： Wei Li ,  Daphne Yu

    IPC分类号： G06T17/00

    CPC分类号： G06T15/08

    摘要： Rendering with a punching mask is performed without voxelization. A plurality of sub-volumes are identified as a function of the punching mask. The sub-volumes are generally layered in range. Each sub-volume is rendered separately or independently. The renderings from multiple passes or sub-volumes are composited together.

    摘要翻译： 使用冲孔掩模进行渲染，而不进行体素化。 多个子体积被识别为穿孔掩模的函数。 子体积通常分层。 每个子卷单独或单独渲染。 来自多个遍或子卷的渲染合成在一起。

    Optimization and view dependency reduction for processing slice-based volumes
    8.
    发明申请
    Optimization and view dependency reduction for processing slice-based volumes 有权
    优化和查看处理基于片段卷的依赖关系

    公开(公告)号：US20070065001A1

    公开(公告)日：2007-03-22

    申请号：US11337772

    申请日：2006-01-23

    申请人： Daphne Yu ,  Robert Schneider

    发明人： Daphne Yu ,  Robert Schneider

    IPC分类号： G06K9/00

    CPC分类号： G06T19/00 ,  G06T15/08 ,  G06T2219/008

    摘要： This invention describes an optimization and view dependency reduction method for multiplanar reformatting (MPR) of slice-based volume images. This method utilizes a traversal scheme that allows for efficient access of the computer memory layout of a sliced based volume, and therefore optimizes overall processing time. This method does not require changes to the volume memory layout or additional volume memory. Instead, efficient memory access is achieved by adaptive traversal patterns on the reformatting planes. The traversal pattern is adapted on-the-fly during rendering as the reformatting plane location and orientation is changed arbitrarily relative to the volume. In this way, the typical speed differences between various reformatting planes orientations caused by inefficient memory access is greatly reduced. Computer cache coherency, SIMD coherent implementation, and multiprocessing environments are also considered in the design of the traversal pattern.

    摘要翻译： 本发明描述了用于基于片的体积图像的多平面重新格式化（MPR）的优化和视图依赖性降低方法。 该方法利用遍历方案，允许有效地访问基于片段的卷的计算机存储器布局，因此优化整个处理时间。 此方法不需要更改卷内存布局或额外的卷内存。 相反，通过重新格式化平面上的自适应遍历模式实现高效的存储器访问。 随着重新格式化平面位置和方向相对于卷的任意改变，遍历模式在渲染期间随时适应。 以这种方式，由于低效的存储器访问引起的各种重新格式化平面方向之间的典型速度差异大大降低。 在遍历模式的设计中也考虑了计算机缓存一致性，SIMD相干实现和多处理环境。

    Image-based method for detection and removal of small fragments in segmented three-dimensional volumes
    9.
    发明申请
    Image-based method for detection and removal of small fragments in segmented three-dimensional volumes 有权
    基于图像的方法用于检测和去除分段三维体积中的小片段

    公开(公告)号：US20050260658A1

    公开(公告)日：2005-11-24

    申请号：US11110077

    申请日：2005-04-20

    申请人： Gianluca Paladini ,  Daphne Yu

    发明人： Gianluca Paladini ,  Daphne Yu

    IPC分类号： C12Q1/68 ,  G01N33/48 ,  G01N33/50 ,  G06F19/00 ,  G06T5/00 ,  G06T15/00 ,  G06T15/40

    CPC分类号： G06T15/08 ,  G06K9/346 ,  G06K2209/05 ,  G06T5/005 ,  G06T7/11 ,  G06T2200/04 ,  G06T2207/10081 ,  G06T2207/30008

    摘要： A method for detecting and removing small isolated fragments in a 3D segmented volume is disclosed. The 3D segmented volume is projected onto several 2D images from different viewing directions. Isolated 2D fragments are detected in the 2D images. Corresponding 3D fragments are found in the 3D volume by unprojecting corresponding detected 2D fragment locations. The unprojected detected 2D fragment locations are used as seed points for region growing of isolated 3D fragments. Any of the 3D fragments having a volume size below a user-defined threshold are discarded.

    摘要翻译： 公开了一种用于检测和去除3D分段体积中的小分离碎片的方法。 3D分割的体积被投影到来自不同观察方向的几个2D图像上。 在2D图像中检测到孤立的2D片段。 通过取消投影相应的检测到的2D片段位置，在3D体积中找到相应的3D片段。 未投影检测到的2D片段位置用作分离的3D片段的区域生长的种子点。 任何具有低于用户定义阈值的体积大小的3D片段都被丢弃。