• Mr. Kesava Reddy
• Prof. T. Bhaskara Reddy

In this paper, a block DCT based algorithm is developed to embed the watermark into the images. Fig.2 will give complete idea of watermark embedding. Let X be the original gray – level image of size LI x La and the digital watermark W be a binary data of size M1 × M2. During the embedding stage, the host image is first transformed to a spectral domain that facilitates data embedding by modifying the middle frequency range. For this process, the resolution of a watermark image W is assumed to be smaller than that of the original image X. For each 8 × 8 image block, only (64 X (M1 × M2 / L1 × L2) coefficients will be used for watermark embedding. The ratio of (M1 × M2) and (L1 × L2) determines the amount of information to be embedded into the images.

DCT, Embedding, Watermark Image.

"Watermarking Embedding procedures in Middle Frequency Coefficients ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.201-210, March-2019, Available :http://www.jetir.org/papers/JETIR1903433.pdf

"Watermarking Embedding procedures in Middle Frequency Coefficients ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp201-210, March-2019, Available at : http://www.jetir.org/papers/JETIR1903433.pdf