DIGITAL WATERMARKING TECHNIQUE

Geometrical attack degraded the quality of the digital watermarking technique and extracts the watermark symbol form cover image and increases the possibility of piracy of digital multi-media data. Now a day’s digital watermarking plays an important role in different multi-media data such as digital image video audio and many more for the protection of piracy of multimedia data. Various authors proposed various methods for enhancement of security strength of watermarking techniques such as DWT DCT and pixel-based techniques.