关键词:最低有效位; 像素值差异; 图像信息隐藏
Study of image data hiding method based on pixel-value differencing and LSB replacement
XU Kai-ping, ZHENG Hong-yuan, DING Qiu-lin
(College of Information Science & Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China)Abstract:In order to improve the capacity of hidden secret data,this paper presented and implemented a novel steganographic method based on least-significant-bit(LSB) replacement and pixel-value differencing(PVD) method.
Could located a different value from two consecutive pixels by utilizing the PVD method on a smooth area or an edged area. In the smooth areas,hidden the secret data into the cover image by LSB method while using the PVD method in the edged areas. The experimental results show that proposed method has about 1.57-1.97 greater hiding capacity than PVD method, and steganographic image has greater than 38 dB PSNR value to maintain good visual quality. ......