Face Expression Recognition Using Histograms of Oriented Gradients with Reduced Features. - Nikunja Bihari Kar; Korra Sathya Babu; Sanjay Kumar Jena (CVIP (2), 2016)

Face expression recognition system based on ripplet transform type II and least square SVM. - Nikunja Bihari Kar; Korra Sathya Babu; Arun Kumar Sangaiah; Sambit Bakshi (Multim. Tools Appl., 2019)

A hybrid feature descriptor with Jaya optimised least squares SVM for facial expression recognition. - Nikunja Bihari Kar; Deepak Ranjan Nayak; Korra Sathya Babu; Yu-Dong Zhang 001 (IET Image Process., 2021)

Facial expression recognition system based on variational mode decomposition and whale optimized KELM. - Nikunja Bihari Kar; Korra Sathya Babu; Sambit Bakshi (Image Vis. Comput., 2022)