A Steganographic Method Based on Wavelet Contrast and LSB
Yigang He · Dianzi xuebao · 2007
In order to provide larger capacity of the hidden secret data and to maintain a good visual quality of stego-image,in accordance with the visual property that human eyes are insensitive to edged area and dark area,a novel steganographic method based on wavelet contrast and Least-Significant-Bit(LSB)replacement is presented.First,an image is divided into blocks,and every block is decomposed into one-level wavelet to obtain the wavelet contrast.Then,the number of bit-plane embedded is decided with the sum of abstract of wavelet contrast.Finally,secret information is embedded by LSB.From the experimental results,the proposed method can hide much larger information and maintain a good visual quality of stegoimage.Besides,the embedded data can be extracted from the stego-image without referencing the original image.