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    • 10. 发明授权
    • Texture information giving method, object extracting method, three-dimensional model generating method and apparatus for the same
    • 纹理信息赋予方法,对象提取方法,三维模型生成方法和装置
    • US06356272B1
    • 2002-03-12
    • US09254127
    • 1999-11-01
    • Yukinori MatsumotoHajime TerasakiKazuhide SugimotoTsutomu Arakawa
    • Yukinori MatsumotoHajime TerasakiKazuhide SugimotoTsutomu Arakawa
    • G06T1140
    • G06T15/04G06T15/10G06T17/20
    • The present method represents a three-dimensional shape model by polygons according to a plurality of object images information picked up by rotating a real object for every arbitrary angle to assign texture information on each polygon from object image information having the largest projection area of the relevant polygon. In order to improve the color continuity between adjacent polygons, the object image information having correspondence between a polygon of interest and an adjacent polygon thereof is selected so as to be the object image information approximating the shooting position and the shooting direction. An alternative method divides an object image into a plurality of regions, obtains difference between an object image and a background image in region level, outputs a mean value of the absolute value of difference in the region level, and detects the region having the mean value of absolute values of difference equal to or greater than a threshold value as the object portion. Another further method obtains a plurality of object images by shooting only a background of an object of interest and by shooting the object of interest during each rotation. A silhouette image is generated by carrying out a difference process between the object image and the background image. A voting process is carried out on the voxel space on the basis of the silhouette image. A polygon is generated according to the three-dimensional shape obtained by the voting process. The texture obtained from the object image is mapped to the polygon.
    • 本方法根据通过旋转每个任意角度的真实对象而拾取的多个对象图像信息,通过多边形表示三维形状模型,以从具有相关的最大投影面积的对象图像信息分配每个多边形上的纹理信息 多边形 为了提高相邻多边形之间的颜色连续性,选择与感兴趣多边形及其相邻多边形之间具有对应关系的对象图像信息,以便成为近似拍摄位置和拍摄方向的对象图像信息。 一种替代方法将对象图像划分为多个区域,获得区域级别中的对象图像和背景图像之间的差异,输出区域级别的差异的绝对值的平均值,并检测具有平均值的区域 作为对象部分的等于或大于阈值的绝对值的绝对值。 另一种方法通过仅拍摄感兴趣对象的背景并且通过在每次旋转期间拍摄感兴趣的对象来获得多个对象图像。 通过执行对象图像和背景图像之间的差异处理来生成剪影图像。 在轮廓图像的基础上对体素空间进行投票处理。 根据通过投票处理获得的三维形状生成多边形。 从对象图像获得的纹理映射到多边形。