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1. 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）。

2. 发明授权

US4734875A Log mixer circuit 失效
标题翻译：对数混频器电路
公开(公告)号：US4734875A
公开(公告)日：1988-03-29
申请号：US690213
申请日：1985-01-09
申请人： Judit K. Florence , Roy W. Latham
发明人： Judit K. Florence , Roy W. Latham
IPC分类号： G06F1/03 , G06F7/38
CPC分类号： G06F7/4833 , G06F1/0307
摘要： A logarithmic mixer circuit in the form of a conversion circuit for mixing digital representations of logarithmic values eliminating the usual mathematical processes of determining anti-logs, summing them and then determining the logs again, the invention using addition, subtraction and a look up table. Additional utiity is obtained by the use of scaled offset representations of logarithmic values for digital processing and separate representations for zero values. Also the final output values are limited to the range of the inputs in anticipation of further processing.
摘要翻译：一种转换电路形式的对数混频器电路，用于混合对数值的数字表示，消除了确定反日志的通常数学过程，对它们进行求和，然后再次确定原始数据，本发明使用加法，减法和查找表。通过使用数字处理的对数值的缩放偏移表示和零值的单独表示来获得附加的功能。此外，最终的输出值限于预期进一步处理的输入范围。

3. 发明授权

US4570233A Modular digital image generator 失效
标题翻译：模块化数字图像发生器
公开(公告)号：US4570233A
公开(公告)日：1986-02-11
申请号：US394229
申请日：1982-07-01
申请人： Johnson K. Yan , Judit K. Florence
发明人： Johnson K. Yan , Judit K. Florence
IPC分类号： G06T15/40
CPC分类号： G06T15/40
摘要： A digital image generator (DIG) that realizes a modular architecture. The DIG employes a geometric processor that processes a plurality of prioritized faces which comprise an image to be displayed. The faces, in turn, comprise a plurality of picture elements (pixels) which are processed according to whether a skip over logic device determines that the pixels are visible and not occulted. Pixels that are in fact visible are processed, in part, by a Bed of Nails (BON) device-spatial filter device combination. This combination provides quantization of a visible pixel at a subpixel resolution level. Pixels that have been so processed are stored in a frame buffer memory for input to a display.
摘要翻译：实现模块化架构的数字图像生成器（DIG）。 DIG使用几何处理器来处理包括要显示的图像的多个优先面孔。这些面又依次包括多个图像元素（像素），这些图像元素（pixel）是根据跳过逻辑器件是否确定像素是可见的并且不被遮蔽来处理的。事实上可见的像素部分地由钉子（BON）设备 - 空间滤波器装置组合来处理。该组合提供子像素分辨率级别的可视像素的量化。如此处理的像素被存储在帧缓冲存储器中以输入到显示器。

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