International Journal of Hospitality and Tourism Systems

2015 | Volume 8 | Issue 2

Blind Watermarking Scheme for Gray Scale Images using DCT

1. Nidhi Patel – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

2. Pinal Suratwala – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

3. Rupal Patel – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

4. Bhakti Kaneriya – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

5. Dhara Soliya – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

6. Mansi Gandhi – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

7. Vivek Fumaki – Shrimad Rajchandra Institute Of Management And Computer Application, Surat, Gujarat, India

Received
19-Apr-2016 		Accepted
- 		Published
19-Apr-2016
Abstract
Digital watermarking scheme is used to protect copyrights of owners. We proposed blind watermarking scheme based on DCT (Discrete Cosine Transform) algorithm. The proposed method provides hiding a watermark in Gray Scale Image. Digital color image is transformed into Gray Scale Image then the DCT algorithm is used for watermarking process. Block based DCT algorithm used for embedding watermark. For embedding watermark, all bits of the watermark image are embedded in various DCT blocks. To extract watermark same process will be done in inverse manner. In such watermarking scheme, it requires original image to retrieve embedded image where in blind watermarking process it doesnt require cover image to retrieve embedded image.
Keywords Digital Watermarking, Blind Watermarking, Discrete Cosine Transform (DCT)
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