FL-GAN: Feature Learning Generative Adversarial Network for High-Quality Face Sketch Synthesis. - Lin Cao 003; Kaixuan Li 003; Kangning Du; Yanan Guo 003; Peiran Song; Tao Wang 035; Chong Fu 001 (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)