A SSIM-based approach for finding similar facial expressions

— There are various scenarios where finding the most similar expression is the requirement rather than just classifying one, for example, facial expression transfer and facial expression based automatic album generation. This paper proposes a novel method for finding the most similar facial expression. Instead of the regular L2 norm distance, we investigate the use of the Structural SIMilarity (SSIM) metric for similarity comparison as a distance metric in a nearest neighbour unsupervised algorithm. The feature vectors are generated using Active Appearance Models (AAM). We also demonstrate how this technique can be extended and used for finding corresponding facial expression images across two or more subjects, which is useful in applications such as facial animation and automatic expression transfer. Personindependent facial expression performance results are shown on the Multi-PIE, FEEDTUM and AVOZES databases. We also compare the performance of the SSIM metric versus other dist...

• Type: Journal
• Year: 2011
• Where: FGR
• Authors: Abhinav Dhall, Akshay Asthana, Roland Goecke
• Keywords: Biometrics, Expression Transfer, Facial Expression, FGR 2011, Similar Facial Expression