EMGC : An Efficient Unsupervised Person Re-Identification Method Based on Multigrained Complementary Features. - Quanbo Yuan; Jiamu Cheng; Xu Liu; Wenguang Qian; Huijuan Wang; Pengzhi Tian; Shuai Shi; Jianhua Wang; Aoxiang Song (Expert Syst. J. Knowl. Eng., 2026)