“…To further demonstrate the effectiveness of the second contribution of this article i.e., the development of a robust algorithm across different attacks, additional experiments are performed on the existing benchmark databases in the VIS spectrum. The performance of the proposed algorithm is evaluated on the CASIA-Face Anti-Spoofing Database (FASD) (Zhang et al, 2012), Replay-Attack (Chingovska et al, 2012), MSU-MFSD (Wen et al, 2015), 3D Mask Attack Database (3DMAD) (Erdogmus and Marcel, 2013), MSU USSA database (Patel et al, 2016), WMCA , SiW-M (Liu et al, 2019b), Silicone Mask Attack Database (SMAD) (Manjani et al, 2017), and 3D wax figure face database (WFFD) (Jia et al, 2019). These databases cover a wide spectrum of attacks such as print, photo, a replay of video, 3D hard resin masks, and the most challenging silicone mask.…”