基于照片的三维虚拟人重建技术

以标准的三维虚拟人模型为模板,结合从真人的二维正交照片中提取的信息,对其进行重建,得到具有真实感的三维虚拟人模型.首先根据摄像机投影矩阵,得到标准人体三维模型的二维正交投影图像,跟真人的正交照片图像进行对比,得到两者轮廓中对应特征点之间的变形关系.然后利用二维正交图形的变形关系,计算出标准的三维虚拟人和真人的三维虚拟人模型相应三维特征顶点之间的位移关系;并根据特征点之间的相对变形矩阵对分块的标准三维虚拟人模型的所有顶点进行相应的坐标变换.最后提取真人的纹理信息,加载到三维模型中,得到具有真人纹理及相近形态特性的三维虚拟人模型.

Reconstructing 3D virtual humans from photo-realistic images

Using standard 3D virtual human models as templates and combined with the information extracted from 2D orthogonal photographs,realistic human 3D models are developed by reconstructing these 3D model templates.First 2D orthogonal images of a 3D model template are obtained based on a camera projective matrix. Then through comparing these 2D images with the photos of real human,corresponding transformation relations of feature points in silhouettes are obtained.The displacement of 3D feature points between standard virtual human and realistic virtual human is computed from aforementioned relations.The coordinate transformation of vertices of detached 3D human model templates is carried out.Finally, mapping the textures extracted from the images into the virtual models,virtual human models with real human's textures and character shape are constructed.