An Improved Steganographic Scheme Using the Contour Principle to Ensure the Privacy of Medical Data on Digital Images. - R. Bala Krishnan; D. Yuvaraj; P. Suthanthira Devi; Varghese S. Chooralil; N. Rajesh Kumar; Karthikeyan Balasubramanian; Manikandan Ganesan (Comput. Syst. Sci. Eng., 2023)