Invertible Color-to-Grayscale Conversion by Using Clustering and Reversible Watermarking. - Qiaoyi Liang; Runwen Hu; Shijun Xiang (ICME, 2021)

Invertible Color-to-Grayscale Conversion Using Lossy Compression and High-Capacity Data Hiding. - Qiaoyi Liang; Shijun Xiang (IEEE Trans. Circuits Syst. Video Technol., 2022)