10.60933/PRDR/FY7EDJ Zhao, QiLi, HuanhaoZhong, TiantingYu, ZhipengLai, Puxianget al. PolyU Research Data Repository 2025 Optical speckle datasets for "Extended Learning Robustness for High-Fidelity Human Face Imaging from Spatiotemporally Decorrelated Speckles" Zhao, QiLai, Puxiang