Invisible and High Capacity Data Hiding in Binary Text Images Based on Use of Edge Pixels

In this paper, a novel blind method for hiding data in binary text images is presented. In this method, the embedding process is limited to the edge pixels of all connected components. In the embedding process, the secret data are located in locations so that to introduce minimal visual distortion. Unlike existing block-based methods, we embed the secret bits directly into closed outer boundary pixels of all connected components in the text image. Experimental results show the high potentials of the introduced method in terms of data capacity and image quality.