Fig. 4From: A robust encryption watermarking algorithm for medical images based on ridgelet-DCT and THM double chaosTested images ( (I1) Brain; (I2) Orbit; (I3) Internal auditory canal; (I4) Knee; (I5) Foot; (I6) Spine; (I7) Coccygeal vertebra; (I8) Shoulder)Back to article page