Digital display system with color lookup table
    1.
    发明授权
    Digital display system with color lookup table 失效
    具有彩色查询表的数字显示系统

    公开(公告)号:US4710806A

    公开(公告)日:1987-12-01

    申请号:US877910

    申请日:1986-06-24

    CPC分类号: G09G5/06

    摘要: A digital display system includes a frame buffer store containing picture element data which is read out to address a color lookup table from which color data is read to a display device. The color lookup table comprises a first area storing color data common to a plurality of images and further areas each storing color data related to a corresponding one of the images. Data in the first area is generated by uniformly sampling a color space, data in the further areas is generated by sampling and quantizing input image data.

    摘要翻译: 数字显示系统包括一个帧缓冲器存储器,它包含读出来的图象元素数据,以将一个颜色查找表寻址到一个显示装置上。 颜色查找表包括存储多个图像公共的颜色数据的第一区域和每个存储与相应图像相关的颜色数据的其他区域。 通过对颜色空间进行均匀采样来生成第一区域中的数据,通过对输入图像数据进行采样和量化来生成其他区域中的数据。

    Method and device for volume rendering using concentric spherical
slicing isosurfaces
    2.
    发明授权
    Method and device for volume rendering using concentric spherical slicing isosurfaces 失效
    使用同心球形切片等值面的体绘制方法和装置

    公开(公告)号:US5956041A

    公开(公告)日:1999-09-21

    申请号:US991019

    申请日:1992-12-15

    IPC分类号: G06T15/20 G06T17/20

    CPC分类号: G06T15/50

    摘要: A rendering method is provided that can materialize rendering processing from volume data at high speed using a surface rendering processor without restrictions on the structure of volume data to be processed. In the method, the sampling points of volume data V over a 3-D region are, in principle, arranged on the surfaces Q.sub.1, Q.sub.2, . . . Q.sub.n in equal intervals along a viewing ray L around viewing point p, and these surfaces are extracted as a set of triangles T.sub.i. Then, the volume data at each vertex of these triangles and the gradient vectors of this data are obtained by interpolation and generated as a triangle data group. High-speed volume rendering is materialized by displaying the data groups of these partially transparent triangles using a surface rendering processor. Since existing programs can be used for generation and processing of triangle data groups, there are no restrictions on the structure of the volume data to be handled.

    摘要翻译: 提供了一种渲染方法,其可以使用表面渲染处理器高速地从卷数据实现渲染处理,而不限制要处理的卷数据的结构。 在该方法中,三维区域上的体数据V的采样点原则上被布置在表面Q1,Q2上。 。 。 Qn沿着观察点L围绕观察点p等间隔,并且这些表面被提取为一组三角形Ti。 然后,通过插值获得这些三角形的每个顶点处的体积数据和该数据的梯度向量,并将其生成为三角形数据组。 通过使用表面渲染处理器显示这些部分透明三角形的数据组来实现高速体绘制。 由于现有程序可用于三角形数据组的生成和处理,因此对要处理的卷数据的结构没有限制。

    Data visualizer utilizing exterior selected and depth sorted polyhedron
faces
    3.
    发明授权
    Data visualizer utilizing exterior selected and depth sorted polyhedron faces 失效
    数据可视化器利用外部选择和深度排序的多面体面

    公开(公告)号:US5742293A

    公开(公告)日:1998-04-21

    申请号:US607048

    申请日:1996-02-26

    IPC分类号: G06T15/00 G06T15/06 G06T15/40

    CPC分类号: G06T15/40 G06T15/06

    摘要: To provide high-speed volume rendering without computing the points at which a viewing ray intersects with the boundaries of a volume data area. Visualizing a volume entails: selecting the exterior faces that face toward a viewing point from among a plurality of exterior faces of a volume data area, sorting the ones thus selected according to distance from the viewing point, selecting those exterior faces in the sorting order, and determining pixels on a projection plane corresponding to the exterior faces in question by scan conversion; computing pixel values along each viewing ray passing through each pixel for each corresponding exterior face until a final exterior face is encountered; such a final exterior face can be judged from information on many partial solids restricting the volume data area; when a viewing ray enters the volume data area again, pixel values to be added later on another exterior face are computed and added to the previous pixel values; the completion of processing of all exterior faces facing toward a viewing point is tantamount to the completion of processing all viewing rays.

    摘要翻译: 提供高速体积渲染,而不需要计算观察光线与体积数据区域边界相交的点。 可视化卷需要:从卷数据区域的多个外表面中选择面向观察点的外表面,根据距离观察点的距离对由此选择的那些进行排序,在排序顺序中选择这些外表面, 以及通过扫描转换来确定与所述外部面对应的投影平面上的像素; 沿着每个观察光线计算每个对应的外表面的每个像素的像素值,直到遇到最后的外表面; 可以从限制体积数据区域的许多部分固体的信息来判断这样的最终外部面部; 当观看光线再次进入体数据区域时,计算另外的外部面部稍后添加的像素值并将其相加到先前的像素值; 面向观察点的所有外表面的处理完成等于处理所有观看光线的完成。