expressionlet

English

Etymology

From expression +‎ -let.

Noun

expressionlet (plural expressionlets)

1. A small part of an expression
   • 2015, Mengyi Liu, Shiguang Shan, Ruiping Wang, Xilin Chen, “Learning Expressionlets via Universal Manifold Model for Dynamic Facial Expression Recognition”, in arXiv‎^[1]:

     Specifically, our method contains three key stages: 1) each expression video clip is characterized as a spatial-temporal manifold (STM) formed by dense low-level features; 2) a Universal Manifold Model (UMM) is learned over all low-level features and represented as a set of local modes to statistically unify all the STMs. 3) the local modes on each STM can be instantiated by fitting to UMM, and the corresponding expressionlet is constructed by modeling the variations in each local mode.