A Fragile Watermark Method for Improving Medical Images Security
Liangyong Huang · Journal of Computers · 2014
Aiming at the medical images security problem during storage and transmission, the author provides a fragile watermark method to protect it. And this method can be able to achieve integrity detection and accurate tampering localization. This method adopt s image block, chaotic modulation in watermark information and encryption to set password . The watermark information will be embedded to the least significant bits of original medical image’s sub - block area. Experimental results show that the algorithm has the following features: ( 1 ) T h e watermarked medical images has high and stable quality . ( 2 ) I t is sensitive to manipulations, and any manipulation of any pixel can be detected . ( 3 ) T he tampering localization can be accurate into 2×2 pixel area . ( 4 ) T he algorithm achieves the blind detection with high security.