1 INTRODUCTION  
2 MICRO-EXPRESSION DATABASES  
3 SPOTTING OF FACIAL MICRO-EXPRESSIONS  
3.1 Pre-processing  
3.2 Facial Micro-expression Spotting  
3.3 Performance Metrics  
4 FACIAL MICRO-EXPRESSION RECOGNITION  
4.1 Pre-processing  
4.2 Facial Micro-expression Representations  
4.3 Classification  
4.4 Experimental Protocol & Performance Metrics  
5 CHALLENGES  
5.1 Micro-expression Databases  
5.2 Micro-expression Spotting  
5.3 Micro-expression Recognition  
5.4 Experiment Related Issues  
6 CONCLUSION