• kesavan Gopal

Abstract. The main requirement of any watermark extraction algorithm is to withstand the geometrical compression and rotational attacks. Designing of such an algorithm has become prime important with the necessity to extract the watermark from the severest attacks. A new watermark extraction algorithm using color pixel comparison is proposed in this paper. Many watermarking algorithm rely on the ability of extraction procedure which retrieves watermark from the watermarked material, and also how much the quality of extraction algorithm extracts when the watermarked image or video undergoes severe attacks [3]. With the existing watermarking algorithms will not extract the watermark to a reasonable or viewable range of the watermark embedded in the image or video after severe attacks [1][6]. Using a new watermark extraction algorithm, which compares the attacked image with the original watermarked image, which in turn compared with the original image, we are supposed to extract the watermark under worst attacked condition. By using this procedure watermark supposed to be reconstructed will have distortion even less than 10% of the original watermark. The capability of the new idea withstands almost all type of attacks including, highly rotation, highly downscaling, largest compression, cropping, ambiguity, noise addition, pixel deletion with the existing algorithms will not extract such a quality of watermark, will be useful for extracting watermark from any type of embedded images.

Keywords: Robust Watermark Extraction Algorithm, Geometrical Compression, Sub-Decimal Rotational Attacks

"Robust Watermark Extraction Algorithm for Geometrical Compression and Rotational Attacks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.1428-1433, March-2019, Available :http://www.jetir.org/papers/JETIREL06215.pdf

"Robust Watermark Extraction Algorithm for Geometrical Compression and Rotational Attacks", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp1428-1433, March-2019, Available at : http://www.jetir.org/papers/JETIREL06215.pdf