Abstract: Logo watermarking is attaining wide popularity in today’s time. Watermarking has wide range of applications such as content identification and management, content protection, forensics and piracy deterrence, document and image security and many more. This paper presents a tamper-resistant algorithm for watermarking images. With appropriate alterations to the embedding and extraction methods, we can encapsulate logo watermark in the image by the use of watermark embedder. In this paper, we systematically review proposed attacks on watermarks. We use enlightened watermark detector which can extract the watermark even in the presence of geometric attacks.

Keywords: Logos, Image files, Watermark, Pixel