Advanced Computing and Communication Techniques for High Performance Applications |
Foundation of Computer Science USA |
ICACCTHPA2014 - Number 2 |
February 2015 |
Authors: Keerthi K M |
06076509-de4a-4f52-a361-5fbcf1ba9fa8 |
Keerthi K M . A Novel Steganographic Method based on Edge Detection and Adaptive Multiple Bits Substitution. Advanced Computing and Communication Techniques for High Performance Applications. ICACCTHPA2014, 2 (February 2015), 1-4.
This paper proposes a novel method for grayscale image steganography based on edge detection and adaptive multiple bits substitution. The pixels located in the edge regions usually present more random characteristics than the smooth regions. In proposed method, the Sobel operator is used to compute the gradient magnitude of the pixels of the cover image. As a result, all edges of the cover image, both horizontal and vertical, are fully detected. The sharper edges are adaptively preserved and the weaker edges are suppressed, according to the length of secret data. Therefore, the sharper edges will be used in advance of the weaker edges and the smooth regions for data embedding. Next, the data embedding route is determined using a pseudorandom number generator (PRNG) and multiple bits of secret data are adaptively embedded into k- LSBs of the pixels in the route. The value k depends on the gradient magnitude of each pixel . The larger the gradient magnitude, the larger the value k. .