Recovery of Watermarks from Distorted Images

Many techniques for watermarking of digital images have appeared in numerous publications. Most of these techniques are sensitive to cropping and or a ne distortions e.g., rotation and scaling. In this paper we describe a method for the recovery of original size and appearance of images based on the concept of identi cation marks  ngerprints"; the method does not require the use of the original" image, but only a small number of salient image points. We show that, using our method, it is possible to recover original appearances of distorted images. The restored image can be used to recover embedded watermarks.

• Type: Conference
• Year: 1999
• Where: IH
• Authors: Neil F. Johnson, Zoran Duric, Sushil Jajodia
• Keywords: Identi Cation Marks, IH 1999, Image, Information Management, Salient Image Points