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1. 发明授权

US07304645B2 System and method for improving signal to noise ratio in 3-D point data scenes under heavy obscuration 有权
标题翻译： 3-D点数据场景下信噪比提高的系统和方法
公开(公告)号：US07304645B2
公开(公告)日：2007-12-04
申请号：US10892055
申请日：2004-07-15
申请人： Steven G. Blask , Tim Faulkner , Mark Rahmes
发明人： Steven G. Blask , Tim Faulkner , Mark Rahmes
IPC分类号： G60T17/00
CPC分类号： G01S17/89 , G01S7/003 , G01S7/4802
摘要： A method comprises loading LADAR point data into a three-dimensional voxel array as a plurality of components (304); determining connected components in the array (306); determining a size for each component and a hit count of occupied voxels (316); and determining whether each occupied voxel is to be written to an output file (312), wherein occupied voxels are written (312) to the output file according to a set of criteria based on statistics for determining when a voxel represents a light pulse reflected by a physical object.
摘要翻译：一种方法包括将LADAR点数据作为多个组件加载到三维体元阵列中（304）; 确定阵列中的连接的组件（306）; 确定每个组件的大小和占用体素的命中数（316）; 并且确定是否要将每个被占用的体素写入输出文件（312），其中根据用于确定何时体素代表由...体反射的光脉冲的统计的统计量，根据一组标准将输入文件写入（312）到输出文件物理对象。

2. 发明授权

US07061488B2 Lighting and shadowing methods and arrangements for use in computer graphic simulations 有权
公开(公告)号：US07061488B2
公开(公告)日：2006-06-13
申请号：US10010776
申请日：2001-12-06
申请人： Mark R. Randel
发明人： Mark R. Randel
IPC分类号： G60T17/00
CPC分类号： G06T17/00 , G06T15/405 , G06T15/506
摘要： The effects of lighting and resulting shadows within a computer simulated three-dimensional scene are modeled by rendering a light depth image and a light color image for each of the light sources. The light depth images are compared to a camera depth image to determine if a point within the scene is lighted by the various light sources. An accumulated light image is produced by combining those portions of the light color images determined to be lighting the scene. The resulting accumulated light image is then combined with a camera color image to produce a lighted camera image that can be further processed and eventually displayed on a computer display screen. The light color image can be static or dynamic. Transformations between different perspective and/or coordinate systems can be precalculated for fixed cameras or light sources. The various images and manipulations can include individual pixel data values, multiple-pixel values, polygon values, texture maps, and the like.

3. 发明授权

US07952575B2 Computer-implemented process and system for creating a parametric surface 有权
标题翻译：用于创建参数表面的计算机实现过程和系统
公开(公告)号：US07952575B2
公开(公告)日：2011-05-31
申请号：US11780792
申请日：2007-07-20
申请人： Sébastien Rosel
发明人： Sébastien Rosel
IPC分类号： G60T17/00
CPC分类号： G06T17/30
摘要： The invention is directed to a computer program product, a computer system, computer apparatus and a computer-implemented method for creating a parametric surface. The invention provides a base mesh having a plurality of outer or inner vertices with valence greater than two. The vertices define faces and at least one of the vertices is an extraordinary vertex. The invention converts faces of the base mesh into parametric elementary surfaces and trims at least one of said parametric elementary surfaces located in the vicinity of the extraordinary vertex. Trimming is performed according to: (i) at least two parametric elementary surfaces adjacent to a subject parametric elementary surface; and (ii) the base mesh. Next the invention constructs at least one parametric elementary surface, adjacent to the trimmed parametric elementary surface, wherein the resulting parametric elementary surfaces form the parametric surface.
摘要翻译：本发明涉及一种用于创建参数表面的计算机程序产品，计算机系统，计算机设备和计算机实现的方法。本发明提供了具有多于两个价态的多个外顶点或内顶点的基网。顶点定义面，并且顶点中的至少一个是非常的顶点。本发明将基网的面转换为参数基本表面，并修剪位于非常顶点附近的至少一个参数元素表面。根据以下步骤执行修剪：（i）与主题参数基本表面相邻的至少两个参数基本表面; 和（ii）基网。接下来，本发明构造了与修剪的参数元素表面相邻的至少一个参数元素表面，其中所得到的参数元素表面形成参数表面。

4. 发明授权

US07295202B2 System for approximating and displaying three dimensional CAD data, and system for executing method thereof 有权
公开(公告)号：US07295202B2
公开(公告)日：2007-11-13
申请号：US10506762
申请日：2003-12-26
申请人： Tsuyoshi Harada , Shintaro Nakayama
发明人： Tsuyoshi Harada , Shintaro Nakayama
IPC分类号： G60T17/00
CPC分类号： G06T17/20 , G06T17/205 , G06T17/30
摘要： The objective of the present invention is to provide a method for approximating and displaying a three-dimensional object represented by CAD data. In particular, the present invention provides a method for approximating CAD data representing a three-dimensional object, comprising steps of: (a) generating a mesh with mesh lines for approximating each face of the three-dimensional object represented by the CAD data within a rough conversion tolerance with respect to a specified conversion tolerance; (b) approximating a boundary edge surrounding and defining each individual face with a plurality of curves within the specified conversion tolerance, approximating each of the curves with a polyline comprising points and connecting lines within the rough conversion tolerance to define boundary points which are the points of the polylines, and obtaining a vector tangential to the curve at each of the boundary points; (c) generating polygons with three or four vertices by connecting internal points which are points of intersection of the mesh lines inside the boundary edge, and by connecting the boundary points and the internal points that are adjacent to and inside the boundary edge; (d) calculating a vector normal to the face at each of the vertices of each of the polygons, storing information identifying the vertices and the corresponding normal vectors, and storing the tangential vector at each of the boundary points obtained at the step (b); (e) converting each of the polygons with three or four vertices to a triangular or quadrilateral surface by using a plurality of control points obtained by processing the information identifying the vertices, the normal vectors, and the tangential vectors; and (f) examining if each of the triangular or quadrilateral surfaces is close to the face represented by the CAD data within the specified conversion tolerance, and if not, regenerating a mesh with a narrower mesh width and more mesh lines on the face to repeat the steps (c)-(e) and (f). It is preferable that the polygons are triangles.

5. 发明授权

US06867770B2 Systems and methods for voxel warping 有权
标题翻译：体素翘曲的系统和方法
公开(公告)号：US06867770B2
公开(公告)日：2005-03-15
申请号：US10017703
申请日：2001-12-14
申请人： Bradley A. Payne
发明人： Bradley A. Payne
IPC分类号： G06T17/00 , G06T17/10 , G09G5/00 , G60T17/00
CPC分类号： G06T17/00 , G06T17/10
摘要： Systems and methods for calculating a modification of a geometrical shape by applying an inverse modification function to an array representing the shape. An array representing the geometrical shape is defined on a multi-dimensional space. A modification function is used to modify the geometrical shape. A user or a programmed computer can select the modification function. The computer applies an inverse of the modification function to the array. The computer deduces a change in the geometrical shape from the modified array. An advantage of the system and method is the ability to compute shape changes in certain situations where a direct computation is cumbersome or otherwise inconvenient.
摘要翻译：通过对表示形状的阵列应用逆修正函数来计算几何形状的修改的系统和方法。在多维空间上定义表示几何形状的数组。修改函数用于修改几何形状。用户或编程的计算机可以选择修改功能。计算机将修改函数的反向应用于数组。计算机从修改的数组中推导出几何形状的变化。系统和方法的一个优点是在直接计算麻烦或其他不便的某些情况下计算形状变化的能力。

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