SemHiTok: A Unified Image Tokenizer via Semantic-Guided Hierarchical Codebook for Multimodal Understanding and Generation - Chen, Zisheng; Wang, Chunwei; Huang, Runhui; Xu, Hongbin; Chen, Xiuwei; Zhou, Jun; Han, Jianhua; Xu, Hang; Liang, Xiaodan (International Conference on Learning Representations, 2026)