To provide a large

scalable embedding capacity and maintain a good visual quality of stego-image

this paper presents a novel steganography.According to human visual characteristic

the algorithm divides an image into smooth area

transition area

and edged area by the difference between the maximum pixel value and the minimum pixel value of 3 neighboring pixels;according to the characteristics of the module cycle

it uses modulus function with security features to adaptively embed different bits information into a pixel in 3 different areas with one of the embedding schemes.Different embedding scheme gets different rates of embedding and visual quality of stego-image.Experimental results show that the algorithm can maintain a high embedding rate while maintaining good visual quality of stego-image

and good security.