Color image dual watermarking using DCT and DWT combine approach

In the current scenario, information transmission through digitize way is becoming a fast variant. But security between information transmissions is a measure concern. So digital watermarking technology provides a way for prevention of unauthorized access, distinguish information against illegal exploitations and allocations and copyright protection of the digitize data. Digital watermarking method should be robust, so it would be recoverable even if a part of this is altered. For embedding and extracting the watermark from the original image many different methods are provided. In this research paper watermarking is done by the combining the features of DWT (Discrete wavelet transformation) and Discrete Cosine Transformation (DCT). Red color component of the image is used for applying the DWT for embedding the watermark. After this, DCT is implemented on the 8×8 block of the image. Using this functionality a more secure and robust image is found.