Image watermarking based on cuckoo search with dwt using lévy flight algorithms

With the expansion of digital world, the scope of copyright has started facing a great threat. Thus, there is a need to protect the original work from being copied or distributed illegally. Image watermarking plays a very important role in solving this issue. Image watermarking is the procedure to embed a particular piece of information (watermark) in an image such that it is not distorted. Thus on extracting the watermarking, the owner can claim his copyright. This paper presents image watermarking technique based on cuckoo search using lévy flight algorithms. Considering the parameters of imperceptibility and robustness, the lévy flight algorithms-Mantegna Algorithm and McCulloch Algorithm are compared and the results are discussed.