Subject-Independent Facial Expression Recognition with Biologically Inspired Features
Weifeng Liu, Caifeng Song, Yanjiang Wang College of Information and Control Engineering, China University of Petroleum (East China), Qingdao, P.R. China
Abstract—Despite of much research for facial expression recognition, recognizing facial expressions across different persons is still a challenging computer vision task. However, facial expression analysis seems naturally for human visual system. Motivated by visual biology, this paper proposes an invariant feature extraction method for subject-independent facial expression recognition. In particular, we extract the biologically inspired facial features using extended visual cortex model-HMAX which consist of a template matching and a maximum pooling operation. We carefully organized the facial features and achieve subject-independent facial expression recognition using a sparse representation based classifier. The experiments on Yale database and JAFFE database demonstrate the significance of our proposed method for subject-independent facial expression recognition.
Cellular Differentiation Algorithm for High Dimensional Numerical Function Optimization
Yanjiang Wang，Chengna Yuan , Weifeng Liu
College of Information and Control Engineering, China University of Petroleum (East China)Qingdao, P.R.China
Abstract— Inspired by the cellular differentiation mechanism of organisms, combined with the theory of artificial life and swarm intelligence, a new biomimetic optimization algorithm, cellular differentiation optimization algorithm (CDOA), is proposed in this paper. A certain number of cells are randomly distributed in the search space to find the optimal solution by activating their differential behaviors such as division, growth, migration, adhesion and apoptosis. Experimental results on several benchmark complex functions with high dimensions show that the proposed cellular differentiation optimization algorithm can rapidly converge at high quality solutions and outperform some of the state-of-art in high-dimension numerical function optimization.