Xingyue Lin Xingjian Hu Shuai Peng Jianhua Zhu Liangcai Gao SketchRef: a Multi-Task Evaluation Benchmark for Sketch Synthesis. 1-6 2025 ICME https://doi.org/10.1109/ICME59968.2025.11209079 conf/icmcs/2025 db/conf/icmcs/icme2025.html#LinHPZG25 streams/conf/icmcs