基于人脸特征的摄影物距计算方法

针对从人像中计算摄影物距，结合面貌测量和射影几何的理论提出了一种方法：首先在人面部的平面区域内，选取眼角点、口角点、鼻翼点建立人脸模型，然后根据面部特征点的分布规律和投影原理，在照片平面与三维人脸位置之间建立起对应关系，最后利用面貌测量的统计知识求解出摄影的物距。这种方法无需任何辅助设备，易于实现，具有一定的实用性

Estimation of photographic object distance based on facial features

Aiming at estimating the photographic object distance from facial image,a method was proposed based on the theory of anthropometry in face and projective geometry.Firstly,the points of nose-wing and the corners of eyes and mouth were selected to estimate a facial model within the facial plane.Secondly,the correspondence between the image plane and the location of three-dimensional facial region was established based on the distribution of facial features inside the facial region and projective theory.Finally,the photographic object distance was computed by using anthropometry statistics.Without requiring any auxiliary equipments,the proposed method is easier to be implemented than traditional ones,and therefore has a better practicability.