Abstract
Data hiding is usually irreversible and causes slight degradation in the cover image after embedding data. In some applications, such as military, medical and etc., they are desired to extract the embedded secret message and to restore original image. We present a high capacity reversible data embedding technique based on difference modification. We explore the redundancy in each color component respectively. We can also adopt the cross-color embedding after data embedding in each color component. Our method can identify the embedding locations without using the location map to increase the payload size.