Data Hiding in Images by Hybrid LSB Substitution

In this paper, two hybrid LSB substitution image hiding methods are proposed. The first method couples two previous works, the optimal LSB substitution and the optimal pixel adjustment process (OPAP), to improve the quality of the stego-image. The second method is a variation of the first one. It replaces the optimal LSB substitution with the worst LSB substitution. Based on the collaboration technologies, better stego-image quality can be achieved. Experimental results also show that the proposed methods are superior to previous works.