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91. 发明授权

US5720019A Computer graphics system having high performance primitive clipping preprocessing 失效
标题翻译：具有高性能原始裁剪预处理的计算机图形系统
公开(公告)号：US5720019A
公开(公告)日：1998-02-17
申请号：US488639
申请日：1995-06-08
申请人： Louise A. Koss , Mary Louise Nash
发明人： Louise A. Koss , Mary Louise Nash
IPC分类号： G09G5/00 , G06T11/00 , G06T15/30 , G06T15/10
CPC分类号： G06T15/30 , G06F9/30021
摘要： A graphics processing circuit for use in a graphics accelerator that includes a clipping processor, with a vertex input data path operatively connected to a vertex data input of the clipping processor. A clipping preprocessor has a vertex data input operatively connected to the vertex input data path and a control output operatively connected to a control input of the clipping processor. The clipping preprocessor is constructed and arranged to perform an evaluation of a relationship between primitive vertex data from the vertex input data path and a clip region and to provide a signal on the control output based on this evaluation.
摘要翻译：一种用于图形加速器中的图形处理电路，其包括剪切处理器，顶点输入数据路径可操作地连接到剪辑处理器的顶点数据输入。裁剪预处理器具有可操作地连接到顶点输入数据路径的顶点数据输入和可操作地连接到裁剪处理器的控制输入的控制输出。裁剪预处理器被构造和布置成执行来自顶点输入数据路径的原始顶点数据与剪辑区域之间的关系的评估，并且基于该评估在控制输出上提供信号。

92. 发明授权

US5396585A Clipping processor 失效
标题翻译：剪切处理器
公开(公告)号：US5396585A
公开(公告)日：1995-03-07
申请号：US825614
申请日：1992-01-24
申请人： Tatsuya Fujii , Naoto Shiraishi , Masanobu Fukushima , Tatsuya Nakajima , Yasuhiro Izawa
发明人： Tatsuya Fujii , Naoto Shiraishi , Masanobu Fukushima , Tatsuya Nakajima , Yasuhiro Izawa
IPC分类号： G06F3/153 , G06T11/00 , G06T11/20 , G06T15/30 , G09G5/20 , G09G5/36 , G06F15/40
CPC分类号： G06T15/30
摘要： A clipping processor has a first polygonal end point memory for storing two end point information of X and Y constituting a polygon and respective end point information of mapping information. The clipping processor also has a screen side generating circuit for judging whether a polygonal side crosses each of screen end points and is located inside or outside a screen based on the two end point information from the first polygonal end point memory. The clipping processor further has an intersecting point arithmetic circuit for calculating an intersecting point on the polygonal side at each of the screen end points and respective end point addresses of the mapping information at the intersecting point on the basis of data from the screen side generating circuit. The two end point information and the mapping information at the intersecting point on the polygonal side at each of the screen end points are clipped by the intersecting point arithmetic circuit and are written to the second polygonal end point memory.
摘要翻译：剪辑处理器具有用于存储构成多边形的X和Y的两个端点信息的第一多边形终点存储器以及映射信息的各个终点信息。剪辑处理器还具有屏幕侧产生电路，用于基于来自第一多边形终点存储器的两个端点信息来判断多边形边是否跨过屏幕终点并且位于屏幕内部或外部。削波处理器还具有交点运算电路，用于根据来自屏幕侧发生电路的数据计算交点处的每个屏幕终点和映射信息的各端点地址的多边形相交点。每个屏幕终点处的多边形侧的交点处的两个端点信息和映射信息被交叉点运算电路截取并写入第二多边形终点存储器。

93. 发明授权

US5329613A Apparatus and method for relating a point of selection to an object in a graphics display system 失效
标题翻译：将选择点与图形显示系统中的对象相关联的装置和方法
公开(公告)号：US5329613A
公开(公告)日：1994-07-12
申请号：US58991
申请日：1993-05-06
申请人： Deborah D. Brase , Steven P. Larky , Joe C. St. Clair , Paolo Sidoli
发明人： Deborah D. Brase , Steven P. Larky , Joe C. St. Clair , Paolo Sidoli
IPC分类号： G06F3/153 , G06F3/033 , G06F3/048 , G06T1/60 , G06T11/80 , G06T15/30 , G09G5/36 , G06F15/62
CPC分类号： G06F3/04842 , G06T15/30
摘要： Apparatus and methods for picking three dimensional objects from images depicted on a video display. The displayed objects are selectively rerendered. During such rerendering the object pixels are compared in depth to the data in a Z buffer for determining visibility. The number and size of the objects subject to rerendering by the rasterization processor is constrained by using the front end graphics processor to define object extents and by rerendering only extents which have been clipped to the boundaries of the pick window. The rerendering operation does not alter the three dimensional graphics image stored in and repetitively scanned from the frame buffer. Selection between multiple objects within the pick window can include a weighted comparison using a pick plane memory to store visibility data by object.
摘要翻译：用于从视频显示器上描绘的图像中拾取三维物体的装置和方法。显示的对象被选择性地重新呈现。在这种重新渲染期间，将目标像素与Z缓冲器中的数据进行深度比较以确定可视性。通过使用前端图形处理器来定义对象范围并且仅重新渲染已经被剪辑到选择窗口的边界的范围，限制由光栅化处理器重新渲染的对象的数量和大小。退回操作不会改变存储在帧缓冲器中并重复扫描的三维图形图像。选择窗口内的多个对象之间的选择可以包括使用拾取平面存储器按对象存储可见性数据的加权比较。

94. 发明授权

US5297240A Hardware implementation of clipping and intercoordinate comparison logic 失效
标题翻译：硬件实现削减和协调比较逻辑
公开(公告)号：US5297240A
公开(公告)日：1994-03-22
申请号：US841883
申请日：1992-02-25
申请人： Curtis Priem , Chris Malachowsky
发明人： Curtis Priem , Chris Malachowsky
IPC分类号： G06T15/30 , G06F15/62
CPC分类号： G06T15/30
摘要： An apparatus for implementing, in hardware, clipping and intercoordinate comparison logic in a graphic display subsystem. Clipping is necessary when an object to be displayed is defined as being only partially contained within a pre-determined window on a video display. For example, if a rectangular window is defined in the upper left hand corner of a video display, and a line has been defined which extends from the upper left-hand corner to the lower right-hand corner of the display, the portion of the line which is outside the defined window is not displayed, i.e., it is clipped. Additionally, if a line of text is wider than the window, the portion of the line of text which is outside the window must also be clipped. Calculations in the nature of comparisons are performed in hardware for use by a graphical subsystem for clipping images to be displayed on a video display in hardware whenever possible, leaving for software only those images, or portions of images which cannot be reliably clipped using the hardware of the graphical subsystem.
摘要翻译：一种用于在硬件中实现图形显示子系统中的削波和协调比较逻辑的装置。当要显示的对象被定义为仅部分地包含在视频显示器上的预定窗口内时，剪切是必要的。例如，如果在视频显示器的左上角定义了矩形窗口，并且已经定义了从显示器的左上角延伸到右下角的线，在定义的窗口之外的行不被显示，即被剪切。另外，如果一行文本比窗口宽，那么在窗口之外的文本行的部分也必须被剪切。在硬件中执行比较性质的计算，以便由图形子系统用于在可能的情况下在硬件中剪切要显示在视频显示器上的图像，仅使软件仅使用那些图像，或者使用硬件不能可靠地裁剪的图像部分的图形子系统。

95. 发明授权

US5040130A Computer graphics boundary--defined area clippping and extraneous edge deletion method 失效
标题翻译：计算机图形边界定义区域剪切和外部边缘删除方法
公开(公告)号：US5040130A
公开(公告)日：1991-08-13
申请号：US520161
申请日：1990-05-07
申请人： Fu-Chung Chang , James A. Donnelly , Richard A. Marino , Terence W. Lindgren
发明人： Fu-Chung Chang , James A. Donnelly , Richard A. Marino , Terence W. Lindgren
IPC分类号： G06T15/30
CPC分类号： G06T15/30
摘要： A method for clipping a line segment boundary-defined area against a limiting plane is disclosed for use in a computer graphics display system wherein graphics figures are represented by random sets of polylines definitive of line segment boundary-defined areas. Pursuant to the clipping method, once two intersection points are generated against one plane, the points are connected to form an edge of the new clipped boundary-defined area. The order of intersection point connection is irrelevant to the invention and the method can accomodate discontinuously presented data as readily as continuously presented data. Implementing the method essentially requires only one register to store the first intersection point and a flag register to indicate the status of the present clip point, i.e., whether the clipped point is the first or second of two points to be paired. In another aspect of the invention, an improved extraneous edge deletion method is provided capable of deleting extraneous lines formed as a result of a line segment boundary-defined area being clipped against a limiting plane. Pursuant to the method, clipped X-axis and Y-axis extraneous edges are eliminated during area fill processing in the graphics display system.
摘要翻译：公开了一种用于限制针对限制平面限制线段边界限定区域的方法，用于计算机图形显示系统中，其中图形图形由线段边界限定区域的多边形的随机组表示。根据裁剪方法，一旦相对于一个平面产生两个交点，这些点被连接以形成新的剪切边界定义区域的边缘。交叉点连接顺序与本发明无关，该方法可以容纳不间断呈现的数据。实现该方法基本上仅需要一个寄存器来存储第一交点和标志寄存器来指示当前剪辑点的状态，即剪辑点是否是要配对的两个点中的第一或第二。在本发明的另一方面，提供一种改进的外来边缘删除方法，其能够删除由于线段边界限定区域被限制在限制平面上而形成的外来线。根据该方法，在图形显示系统的区域填充处理期间消除了夹持的X轴和Y轴的外部边缘。

96. 发明授权

US5003497A Method for three-dimensional clip checking for computer graphics 失效
标题翻译：计算机图形三维剪辑检查方法
公开(公告)号：US5003497A
公开(公告)日：1991-03-26
申请号：US284942
申请日：1988-12-15
申请人： Curtis Priem
发明人： Curtis Priem
IPC分类号： G06T11/00 , G06T15/30
CPC分类号： G06T15/30
摘要： A method for clip checking three dimensional images for display on a computer display system. The display system includes a computer having a central processing unit(CPU) coupled to a memory and a cathode ray tube (CRT) display. The method of the present invention includes inputting a plurality of points comprising an image to be displayed, wherein each of the points is described by X,Y,Z and W world coordinates. The points are stored in the memory coupled to the CPU. The CPU executes a viewing algorithm which transforms the world coordinates for each point into view reference coordinates. The view reference coordinates have an origin at the viewpoint of the user, with the Z axis pointed outward in the direction of the display screen. Each of the points of the image are described by clipping bits X Right, X Left, Y Top, Y Bottom, Z Back, and Z Front. The view reference coordinate system permits the user to selectively enable/disable clipping quadrants in X,Y,Z and W space. The present invention determines the value of the clipping bits for all of the points (vertices) comprising the image. Using predefined combinational logic, the clipping bits are evaluated and the logic determines if the image is visible, hidden, or if it intersects at least one clipping plane. The method provides an efficient means for determining if a three dimensional image is to be displayed on a computer display system.
摘要翻译：一种用于剪辑检查三维图像以在计算机显示系统上显示的方法。显示系统包括具有耦合到存储器的中央处理单元（CPU）和阴极射线管（CRT）显示器的计算机。本发明的方法包括输入包括要显示的图像的多个点，其中每个点由X，Y，Z和W世界坐标描述。这些点存储在耦合到CPU的存储器中。 CPU执行观察算法，将每个点的世界坐标转换为视图参考坐标。视图参考坐标在用户的观点具有起点，Z轴指向显示屏的方向。图像中的每个点由剪裁位X Right，X Left，Y Top，Y Bottom，Z Back和Z Front描述。视图参考坐标系允许用户选择性地启用/禁用X，Y，Z和W空间中的剪切象限。本发明确定包含该图像的所有点（顶点）的限幅位的值。使用预定义的组合逻辑，裁剪位被评估，并且逻辑确定图像是可见的，隐藏的，或者如果它与至少一个剪切平面相交。该方法提供用于确定三维图像是否要显示在计算机显示系统上的有效手段。

97. 发明授权

US4888712A Guardband clipping method and apparatus for 3-D graphics display system 失效
标题翻译： 3-D图形显示系统的保护带裁剪方法和装置
公开(公告)号：US4888712A
公开(公告)日：1989-12-19
申请号：US117112
申请日：1987-11-04
申请人： Anthony C. Barkans , Brian D. Schroeder , Thomas L. Durant , Dorothy Gordon , Jorge Lach
发明人： Anthony C. Barkans , Brian D. Schroeder , Thomas L. Durant , Dorothy Gordon , Jorge Lach
IPC分类号： G06T15/30
CPC分类号： G06T15/30
摘要： A system for clipping polygons representing three-dimensional objects to produce a representation of the portion of the objects in a desired viewing space is disclosed. A guardband space at least partially enclosing the viewing space is defined. The polygons are compared to the guardband space to determine which polygons intersect at least one of the guardband planes defining the guardband space. The intersecting polygons are also compared to the viewing space to determine if they intersect at least one of the viewing planes defining the viewing space. Only polygons intersecting both a viewing plane and a guardband plane are clipped.
摘要翻译：公开了一种用于剪裁表示三维对象的多边形以产生所需观看空间中对象部分的表示的系统。定义至少部分包围观察空间的护卫空间。将多边形与保护带空间进行比较，以确定哪些多边形与限定保护带空间的保护带平面中的至少一个相交。还将相交的多边形与观看空间进行比较，以确定它们是否与限定观看空间的至少一个观看平面相交。只有与观察平面和保护带平面相交的多边形被剪切。

98. 发明授权

US4208810A Clipping polygon faces through a polyhedron of vision 失效
标题翻译：通过视觉多面体剪切多边形面
公开(公告)号：US4208810A
公开(公告)日：1980-06-24
申请号：US940818
申请日：1978-09-11
申请人： Michel A. Rohner , Judit K. Florence
发明人： Michel A. Rohner , Judit K. Florence
IPC分类号： G06T15/30 , G09B9/30 , G09B9/08 , H04N7/18
CPC分类号： G06T15/30 , G09B9/302
摘要： A flight simulator combines flight data and polygon face terrain data to provide a CRT display at each window of the simulated aircraft. The data base specifies the relative position of each vertex of each polygon face therein. Only those terrain faces currently appearing within the pyramid of vision defined by the pilots eye and the edges of the pilots window need be displayed at any given time. As the orientation of the pyramid of vision changes in response to flight data, the displayed faces are correspondingly displaced, eventually moving out of the pyramid of vision. Faces which are currently not visible (outside the pyramid of vision) are clipped from the data flow. In addition, faces which are only partially outside of pyramid of vision are reconstructed to eliminate the outside portion. Window coordinates are generated defining the distance between each vertex and each of the boundary planes forming the pyramid of vision. The sign bit of each window coordinate indicates whether the vertex is on the pyramid of vision side of the associated boundary panel (positive), or on the other side thereof (negative). The set of sign bits accompanying each vertex constitute the "outcode" of that vertex. The outcodes (O.C.) are systematically processed and examined to determine which faces are completely inside the pyramid of vision (Case A--all signs positive), which faces are completely outside (Case C--All signs negative) and which faces must be reconstructed (Case B--both positive and negative signs).
摘要翻译：飞行模拟器将飞行数据和多面体地形数据相结合，以在模拟飞机的每个窗口上提供CRT显示。数据库指定其中每个多边形面的每个顶点的相对位置。只有目前出现在驾驶员眼睛和飞行员窗口边缘所定义的视野金字塔内的那些地形面才需要在任何给定时间显示。随着视觉金字塔的方向根据飞行数据而变化，显示的面部相应地移位，最终移出视觉金字塔。当前不可见的外观（视觉金字塔外）被从数据流中剪切出来。此外，重建仅部分在视野金字塔之外的面以消除外部部分。生成窗口坐标，定义每个顶点与形成视角金字塔的每个边界平面之间的距离。每个窗口坐标的符号位指示顶点是否在相关边界面板（正）的视觉侧的金字塔上，或者在其另一侧（负）。伴随每个顶点的符号位组合构成该顶点的“代码”。（OC）被系统地处理和检查以确定哪个面部完全在视野金字塔内（情况A-所有符号为正），其面部完全在外面（情况C-全部符号为负），并且哪些面必须被重建案例B - 正面和负面符号）。

99. 发明公开

US20240394977A1 THREE-DIMENSIONAL DISPLAYS USING ELECTROMAGNETIC FIELD COMPUTATIONS 审中-公开
公开(公告)号：US20240394977A1
公开(公告)日：2024-11-28
申请号：US18671515
申请日：2024-05-22
申请人： Pacific Light & Hologram, Inc.
发明人： Jonathan Seamus Blackley , Tina Qin , Asher Zelig Sefami , Kamran Qaderi , Mark Anthony Sararu , Joshua D. Wiensch , Rajay Kumar , Sylvain Marcel Colin
IPC分类号： G06T17/10 , G01R29/08 , G02B5/32 , G02B27/01 , G02B30/40 , G02B30/52 , G02B30/56 , G03H1/02 , G06T15/00 , G06T15/20 , G06T15/30 , G06T19/00 , G09G3/00 , H04N13/15 , H04N13/275 , H04N13/296 , H04N13/32 , H04N13/324 , H04N13/349
CPC分类号： G06T17/10 , G01R29/0807 , G02B5/32 , G02B27/0103 , G02B30/40 , G02B30/52 , G02B30/56 , G03H1/0248 , G06T15/005 , G06T15/205 , G06T15/30 , G06T19/006 , G09G3/003 , H04N13/15 , H04N13/275 , H04N13/296 , H04N13/32 , H04N13/324 , H04N13/349 , G02B2027/0109 , G03H2001/0212 , G03H2001/0224 , G06T2210/21
摘要： Methods, apparatus, devices, and systems for three-dimensional (3D) displaying objects are provided. In one aspect, a method includes obtaining data including respective primitive data for primitives corresponding to an object, determining an electromagnetic (EM) field contribution to each element of a display for each of the primitives by calculating an EM field propagation from the primitive to the element, generating a sum of the EM field contributions from the primitives for each of the elements, transmitting to each of the elements a respective control signal for modulating at least one property of the element based on the sum of the EM field contributions, and transmitting a timing control signal to an illuminator to activate the illuminator to illuminate light on the display, such that the light is caused by the modulated elements of the display to form a volumetric light field corresponding to the object.

100. 发明公开

US20240378816A1 DATA OPTIMIZATION METHODS FOR DYNAMIC CUT BOUNDARY 审中-公开
公开(公告)号：US20240378816A1
公开(公告)日：2024-11-14
申请号：US18763095
申请日：2024-07-03
申请人： Monogram Orthopaedics Inc.
发明人： Kamran SHAMAEI
IPC分类号： G06T19/00 , G06T15/30 , G16H20/40 , G16H50/50
CPC分类号： G06T19/003 , G06T15/30 , G16H20/40 , G16H50/50 , G06T2210/41
摘要： A data optimization method for a dynamic cut boundary includes obtaining a three-dimensional (3D) model, of a patient anatomy, that comprises a collection of points defining a periphery thereof; based on clipping the 3D model to form clipped surface(s) intersecting the periphery of the 3D model, obtaining a set of points that are on/adjacent intersection(s) of the clipped surface(s) and the periphery of the 3D model, the set of points forming a path along the periphery of the 3D model and corresponding to points on the patient anatomy; determining an ordering, of the set of points, that specifies a sequence of the points from a first point to a last point in a continuous path along the periphery of the 3D model, such that each next point in the sequence is a next-encountered point traveling along the continuous path; and performing processing based on the determining.

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