Tong, Zhengyan, Xuanhong Chen, Bingbing Ni, and Xiaohang Wang. “Sketch Generation With Drawing Process Guided by Vector Flow and Grayscale”. Proceedings of the AAAI Conference on Artificial Intelligence 35, no. 1 (May 18, 2021): 609-616. Accessed July 16, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/16140.