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THREE DIMENSIONAL DIGITIZATION OF HUMAN HEAD BY FUSING STRUCTURED LIGHT AND CONTOURS
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作者 JinGang LiDehua 《Journal of Electronics(China)》 2002年第1期37-42,共6页
Three dimensional digitization of human head is desired in many applications. In this paper, an information fusion based scheme is presented to obtain 3-D information of human head. Structured light technology is empl... Three dimensional digitization of human head is desired in many applications. In this paper, an information fusion based scheme is presented to obtain 3-D information of human head. Structured light technology is employed to measure depth. For the special reflection areas,in which the structured light stripe can not be detected directly, the shape of the structured light stripe can be calculated from the corresponding contour. By fusing the information of structured light and the contours, the problem of reflectance influence is solved, and the whole shape of head,including hair area, can be obtained. Some good results are obtained. 展开更多
关键词 Computer vision 3-d information digitization structured light shape from contours Data fusion
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作用在三维任意形状建筑物底面上的渗流压力的数值计算
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作者 邱大洪 藏军 《海洋通报》 CAS CSCD 北大核心 1993年第1期61-68,共8页
本文用数值方法计算了作用在三维任意形状建筑物底面上的波浪引起的渗流压力。本文的计算考虑了三种海床情况,一种是均质的,各向同性的线弹性海床,另一种是有部分抛石基床嵌在线弹性海床之中。其中,抛石基床中的渗流采用非达西流,渗流... 本文用数值方法计算了作用在三维任意形状建筑物底面上的波浪引起的渗流压力。本文的计算考虑了三种海床情况,一种是均质的,各向同性的线弹性海床,另一种是有部分抛石基床嵌在线弹性海床之中。其中,抛石基床中的渗流采用非达西流,渗流阻力满足Forcheimer公式;线弹性海床中的渗流采用达西流,土骨架的位移及孔隙水压满足Biot固结理论。根据Kokkinowrachos,从Biot方程和贮水方程中将土骨架位移消去,从而得到了一个以孔隙水压为变量的泊松方程。据此,本文用有限元方法求解了圆墩和方墩底面上的渗流压力。 展开更多
关键词 渗流 压力 数值计算 建筑物 底面
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