Lena, Mandrill, Boat, Airplane and the other classical test images are available from USC-SIPI Image Database
USC-SIPI
The Kodak test set composed of 24 true color (24 bits) images of sizes 512x768 are available in Portable Network Graphics (PNG) format
at Kodak. We introduced the Kodak set in reversible data hiding in 2011
see D. Coltuc, "Improved embedding for prediction-based reversible watermarking," IEEE Transactions on Information Forensics and Security 6.3 (2011): 873-882,
IEEE
The Canon set, available from Canon,
has eighteen 480x512x3 images. We will present reversible data hiding results on Canon set at IEEE ICIP 2018
Multiple moduli prediction error expansion reversible data hiding,
SPIC2019 - source code in Matlab