A sampling process is designed to implement the computation of the observation likelihood, in which a proposed relation model between head and face of their position and size is used so as to achieve improved accuracy and efficiency in the fusion.

• 其中，利用检测器提供的姿态信息对头部和人脸的位置大小关系提出了一种模型，提高了观测模型融合的准确性和高效性。