Random Insertion Watermarking By Computing Angle Between Two Lines In Blue Components On Postage Stamp

This paper presents a new approach for watermarking by using geometric analytic and mathematical model providing robustness to embed the watermarking in postage stamp (ps) image, using the angle between two lines to insert the embedded information in blue component for pixels. Analytic geometry, also known as coordinate geometry, or Cartesian geometry, is the study of geometry using a coordinate system and analysis. The modern and advanced meaning refers to the geometry of analytic varieties, to develop a data-hiding method that has a good performance in color images. Furthermore, the watermark must be either robust or fragile; depending on the application. The expression "robust" in this paper refers to the capability of the watermark to resist manipulations of the media. Two types of watermarked attack was used; the JEPQ compression as lossy compression (where compressing and decompressing data retrieve hidden information that may be close enough to the original image), and the enhancement filter (mean filter). This proposed watermarking system refers to the watermark objective evaluation test or (WOET).