“…The first one, namely conventional methods (Akleman et al, 2000 ; Fujiwara et al, 2000 ; Chen et al, 2001 ; Liang et al, 2002 ; Gooch et al, 2004 ; Mo et al, 2004 ; Liu et al, 2006 ; Tseng et al, 2012 ; Yang et al, 2016 ), is composed of interactive methods, regularity-based methods, and learning-based methods. On the other hand, GAN-based methods (Cao et al, 2018 ; Shi et al, 2019 ; Zheng et al, 2019 ; Hou et al, 2020 ; Li et al, 2020b ; Gu et al, 2021 ), mainly applies generative adversarial networks (GANs) (Goodfellow et al, 2014 ) for caricature generation.…”