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).