الفهرس | Only 14 pages are availabe for public view |
Abstract Digital watermarking provides the ownership of a piece of digital data by marking the considered data invisibly or visibly. This can be used to protect several types of multimedia objects such as audio, text, image and video. This thesis demonstrates the different types of watermarking techniques such as (discrete cosine transform (DCT) and discrete wavelet transform (DWT)) and their characteristics. Then, it classifies these techniques declaring their advantages and disadvantages. An improved technique with distinguished features, such as Peak Signal to Noise Ratio (PSNR) and Similarity Ratio (SR) has been introduced. The modified technique has been compared with the other techniques by measuring their robustness against differ attacks. Finally, Field Programmable Gate Arrays (FPGA) based implementation and comparison, for the proposed watermarking technique have been presented and discussed. |