US 11,816,762 B2
Three-dimensional reconstruction method based on half-peak probability density distribution
Feiyun Cong, Zhejiang (CN); Huimin Li, Zhejiang (CN); and Shuiguang Tong, Zhejiang (CN)
Assigned to Zhejiang University, Hangzhou (CN)
Filed by Zhejiang University, Zhejiang (CN)
Filed on Jul. 26, 2020, as Appl. No. 16/939,054.
Application 16/939,054 is a continuation of application No. PCT/CN2019/122016, filed on Nov. 29, 2019.
Claims priority of application No. 201910446247.9 (CN), filed on May 27, 2019.
Prior Publication US 2020/0380738 A1, Dec. 3, 2020
Int. Cl. G06T 11/00 (2006.01); G06T 17/20 (2006.01)
CPC G06T 11/005 (2013.01) [G06T 17/20 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A three-dimensional reconstruction method based on half-peak probability density distribution, comprising the following steps:
(1) slicing three-dimensional point cloud along a Z-axis direction to obtain a N spatial layers;
(2) extracting a scatter information in an i-th spatial layer and projecting the information to a Zi plane;
(3) constructing a membership function of each grid and scatter in the Zi plane and drawing a three-dimensional probability density plot;
(4) making a plane parallel to a XOY plane through a half-peak wmax/2 of the three-dimensional probability density plot, the parallel intersecting the three-dimensional probability density plot to obtain a contour LXY, and the contour LXY being a radioactive source reconstruction contour corresponding to the i-th spatial layer; and,
(5) superimposing radioactive source reconstruction contours corresponding to N spatial layers sequentially to obtain a three-dimensional reconstruction model of the radioactive source.