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1. 发明授权

US5083287A Method and apparatus for applying a shadowing operation to figures to be drawn for displaying on CRT-display 失效
标题翻译：用于将阴影操作应用于CRT显示器上显示的图形的方法和装置
公开(公告)号：US5083287A
公开(公告)日：1992-01-21
申请号：US379941
申请日：1989-07-14
申请人： Koei Obata , Takashige Kai
发明人： Koei Obata , Takashige Kai
IPC分类号： G06T15/60 , G09B9/30
CPC分类号： G09B9/301 , G06T15/60
摘要： Discrimination of the condition of polygons is carried out by performing coordinate transformation from a view reference coordinate to a light source coordinate for each polygon. Then shadowing is carried out for every pixel of the polygon which is to be partially shaded. Also when multiple light sources exist, detection of the polygon is carried out by performing a coordinate transformation to each light source coordinate system for each polygon to be subjected to a shadowing operation. The detection includes detecting whether or not each polygon is the most light source side from among several polygons, thereafter intensity for display of each pixel is obtained based upon every detection result corresponding to each light source coordinate system.
摘要翻译：通过对每个多边形执行从视图参考坐标到光源坐标的坐标变换来进行多边形条件的识别。然后对要被部分遮蔽的多边形的每个像素执行阴影。此外，当存在多个光源时，通过对要进行遮蔽操作的每个多边形对每个光源坐标系执行坐标变换来执行多边形的检测。该检测包括检测多个多边形是否是多个多边形中的最多光源侧，然后基于与每个光源坐标系对应的每个检测结果，获得每个像素的显示强度。

2. 发明授权

US5335319A Polygon division method and apparatus 失效
标题翻译：多边形分割方法和装置
公开(公告)号：US5335319A
公开(公告)日：1994-08-02
申请号：US794484
申请日：1991-11-19
申请人： Koei Obata
发明人： Koei Obata
IPC分类号： G06T11/40 , G06T7/60 , G06T17/20 , G06F15/62
CPC分类号： G06T17/20
摘要： A polygon division method, and polygon division apparatus are disclosed for dividing polygons according to a basic judgement as to whether each apex of the polygon is concave or convex. According to the claimed method, and what is carried out by the claimed apparatus, each apex of a polygon is judged as to whether it is concave or convex. The total number of apexes of the polygon is stored. A first convex apex is selected, whereupon a judgement is made as to whether another apex is present in the interior of a triangle that is formed by two sides which unite at the selected convex apex and a line segment that interconnects the ends of such sides. If no other apex is presence in the interior of such triangle, the triangle is cut from the polygon. Otherwise, a different convex apex is chosen. Further, the method and apparatus could include selection of convex apexes based upon whether the convex apexes overlap other apexes. Also, according to the invention, polygon division can be terminated if, during the division, it is determined that an apex has changed from convex to concave during the division.
摘要翻译：公开了一种多边形分割方法和多边形分割装置，用于根据关于多边形的每个顶点是凹凸还是凸出的基本判断来划分多边形。根据要求保护的方法，以及由要求保护的装置执行的是多边形的每个顶点被判定为是凹形还是凸形。存储多边形顶点的总数。选择第一凸顶点，由此判断另一个顶点是否存在于由选定的凸顶部结合的两侧形成的三角形的内部以及将这些侧面的端部相互连接的线段上。如果没有其他顶点存在于这种三角形的内部，则从多边形切割三角形。否则，选择不同的凸顶点。此外，该方法和装置可以包括基于凸顶点是否与其他顶点重叠的凸顶点的选择。此外，根据本发明，如果在分割期间确定在分割期间顶点已经从凸起变成凹陷，则可以终止多边形分割。

3. 发明授权

US5341462A Figure drawing method and apparatus for drawings accentuated lines 失效
标题翻译：图纸绘图方法和设备强调线条
公开(公告)号：US5341462A
公开(公告)日：1994-08-23
申请号：US638898
申请日：1991-01-11
申请人： Koei Obata
发明人： Koei Obata
IPC分类号： G09G5/02 , G06T11/40 , G06T15/40 , G09G5/36 , G06F15/72
CPC分类号： G06T15/405 , G06T15/06 , G06T15/50
摘要： A method fills a polygon and then draws edge lines while inhibiting renewal of only depth data in a depth buffer. Thereafter, a method fills the polygon while inhibiting renewal of only color data in a color buffer. The filling and drawing are performed by applying hidden surface removing processings based upon depth buffer algorithm.
摘要翻译：一种方法填充多边形，然后绘制边缘线，同时禁止在深度缓冲区中更新深度数据。此后，方法填充多边形，同时禁止颜色缓冲器中的仅彩色数据的更新。通过基于深度缓冲算法应用隐藏的表面去除处理来执行填充和绘图。

4. 发明授权

US5128961A Distance measurement method and apparatus, and relative position measurement apparatus 失效
标题翻译：距离测量方法和装置以及相对位置测量装置
公开(公告)号：US5128961A
公开(公告)日：1992-07-07
申请号：US617769
申请日：1990-11-26
申请人： Tomoaki Ueda , Koei Obata
发明人： Tomoaki Ueda , Koei Obata
IPC分类号： G01S13/28 , G01S5/22 , G01S5/30 , G01S7/292 , G01S15/32
CPC分类号： G01S15/325 , G01S5/22 , G01S5/30
摘要： A distance measurement apparatus receives pseudo noise reflected from a target object. The apparatus then obtains a cross-correlation value from cross-correlation of the received pseudo noise with pseudo noise which has been convoluted with expected measurement values. The apparatus measures a distance to the target object based upon the cross-correlation value. Also, a relative position measurement apparatus measures distances to an operator from plural points on the apparatus and then measures a relative position of the operator with respect to the apparatus based upon the plural distances.

5. 发明授权

US5280568A Method and apparatus for drawing a surface model by assigning a drawing priority to each primitive surface model which provides a portion of the surface model 失效
标题翻译：通过为提供表面模型的一部分的每个基本表面模型分配绘制优先级来绘制表面模型的方法和装置
公开(公告)号：US5280568A
公开(公告)日：1994-01-18
申请号：US565482
申请日：1990-08-10
申请人： Koei Obata
发明人： Koei Obata
IPC分类号： G09G5/36 , G06T15/40 , G06F15/72
CPC分类号： G06T15/40
摘要： A method for drawing a surface model performs modelling for plural primitive surface models, each primitive surface model being a part of the surface model, and applies drawing priority to each primitive surface model. Then, the method draws the primitive surface model with hidden surface removal based on depth values when the primitive surface model has the same drawing priority as the drawing priority of another primitive surface model, and draws the primitive surface model without hidden surface removal when the primitive surface model has a higher drawing priority.
摘要翻译：用于绘制表面模型的方法对多个原始表面模型执行建模，每个基本表面模型是表面模型的一部分，并且对每个基本表面模型应用绘制优先级。然后，当原始表面模型与另一个原始表面模型的绘制优先级具有相同的绘制优先级时，该方法基于深度值绘制具有隐藏表面去除的原始表面模型，并且当原始表面模型没有隐藏的表面去除时绘制原始表面模型表面模型具有较高的绘图优先级。

6. 发明授权

US5222203A Method and apparatus for displaying translucent surface 失效
标题翻译：用于显示半透明表面的方法和装置
公开(公告)号：US5222203A
公开(公告)日：1993-06-22
申请号：US879460
申请日：1992-05-04
申请人： Koei Obata
发明人： Koei Obata
IPC分类号： G01N21/47 , G06T15/50
CPC分类号： G06T15/506 , G01N21/47 , G01N2021/1765
摘要： A method for displaying a translucent object on a display screen includes a step of displaying a translucent object by providing a diffused transmitted light component instead of a diffused reflection light component and a specular reflection light component as are necessary for displaying an object as an opaque object. A method for displaying a translucent object on a screen also includes a step of judging whether or not an object to be displayed is to be displayed as a translucent object based upon a relation of a viewpoint and a light source to the object to be displayed.
摘要翻译：用于在显示屏幕上显示半透明物体的方法包括通过提供扩散的透射光分量而不是扩散的反射光分量和镜面反射光分量来显示半透明物体的步骤，这是将物体显示为不透明物体所必需的。用于在屏幕上显示半透明对象的方法还包括基于视点和光源与待显示对象的关系来判断要显示的对象是否被显示为半透明对象的步骤。

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