As an effective method for multimedia authentication and tamper detection

fragile watermarking is drawing extensive attention recently.In this paper

we propose a novel fragile watermarking scheme based on HVS in DWT domain.By use of a specifical modulation

we embed the mark into the DWT coefficients of the original image.The features of proposed algorithm are as follows: i)The algorithm constructs a pyramid structure of the watermark for multi-resolution tamper detection; ii)According to the visual model

the algorithm modifies the coefficients to reduce the perceptible distortion; iii)The algorithm presents a new scheme for tamper detection by using image fusion.We propose several rules to distinguish the type of tamper between mild distortion and severe distortion.The experimental results demonstrate that the watermarks generated with the proposed algorithm can give the precise result of tamper detection when the image has been suffered from malicious tamper while tolerating JPEG lossy compression to a certain extent.