A Crop-resisting Watermarking Scheme Based on Feature
一种基于特征的抗剪裁盲水印算法

As an effective technique of copyright protection,digital watermarking techniques have become a new focus of interest in recent years.A useful watermark scheme should be visually imperceptible and must be robust to various attacks.In this paper,a feature-based algorithm is proposed,which embedded a binary image as watermark in DCT domain by taking into account the feature of gradient and intensity of each block.Especially we embed marker bits to locate the original block of cropped image.The proposed technique could actually survive several kinds of image processing such as image cropping,shifting,blurring,noise,sharpening and JPEG lossy compression etc.The algorithm doesn't need the original image for watermark extraction and the simulation results prove its effectiveness.