Fig. 2
From: High-capacity reversible image steganography based on pixel value ordering
Steps in the PVO steganography method. (1) Cover image slicing. (2) Block pixel ordering. (3) Construction of the location map LM(i). (4) Compression of the location map. (5) Setting of the block threshold. (6) Processing of extra information. (7) Recording of extra information. (8) Hiding of confidential information. (9) Accomplishing steganography of the original cover image according to step 7 until the confidential information is completely hidden