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    • 6. 发明授权
    • Methods, apparatus and computer program products for modeling three-dimensional colored objects
    • 用于三维有色物体建模的方法,设备和计算机程序产品
    • US06853373B2
    • 2005-02-08
    • US09842304
    • 2001-04-25
    • Steven P. WilliamsHerbert EdelsbrunnerPing Fu
    • Steven P. WilliamsHerbert EdelsbrunnerPing Fu
    • G06T15/04G06T17/20G06T15/00
    • G06T17/20G06T15/04
    • Methods, apparatus and computer program products can generate light weight but highly realistic and accurate colored models of three-dimensional colored objects. The colored model may be generated from a second plurality of points that define a coarse digital representation of the surface and at least one texture map containing information derived from a first plurality of colored points that define a fine digital representation of the surface. This derivation is achieved by mapping points within the texture map to the fine digital representation of the three-dimensional surface. Colored scan data may be used to construct the fine digital representation as a triangulated surface (i.e., triangulation) using a wrapping operation. This triangulated surface may be a two-manifold with or without nonzero boundary and the colored scan data may constitute raw point data with each datum comprising three real numbers (x-,y-, z-coordinates) providing geometric information and three integer numbers (r-,g-,b-values) providing color information. Operations are then performed to create the coarse digital representation from the fine digital representation and also preferably create a plurality a texture maps from the fine and coarse digital representations. One map may contain color information and another map may recover geometric detail lost in the simplification process associated with generating the coarse digital representation from the fine digital representation. An additional map may also be generated that corrects for differences in directions of normal vectors associated with the coarse and fine digital representations.
    • 方法,设备和计算机程序产品可以产生重量轻但高度逼真和准确的三维有色物体的彩色模型。 彩色模型可以从限定表面的粗略数字表示的第二多个点产生,并且至少一个纹理图包含从定义表面的精细数字表示的第一多个着色点导出的信息。 这种推导是通过将纹理图中的点映射到三维表面的精细数字表示来实现的。 彩色扫描数据可以用于使用包装操作来构造精细数字表示作为三角测量表面(即,三角测量)。 该三角形表面可以是具有或不具有非零边界的双歧管,并且彩色扫描数据可以构成原点数据,其中每个数据包括提供几何信息和三个整数的三个实数(x-,y-,z-坐标) r-,g-,b-值)提供颜色信息。 然后执行操作以从精细数字表示创建粗略数字表示,并且还优选地从精细和粗略数字表示创建多个纹理图。 一个地图可以包含颜色信息,另一个地图可以恢复与从精细数字表示生成粗略数字表示相关联的简化过程中丢失的几何细节。 还可以生成另外的映射,其校正与粗略和精细数字表示相关联的法向矢量的方向上的差异。