Embedding signals in a raster image processor

A method comprising:

• capturing imagery of printed material using optical capture, the printed material having printing thereon, the printing comprising artwork and a digital watermark signal embedded in the artwork, the digital watermark signal embedded in the artwork by obtaining a plurality of elements representing the signal, determining edges within the artwork, using the determined edges as a reference, modulating a plurality of print structures within raster image processing (RIP) according to the plurality of elements to embed the digital watermark signal within the artwork;
• detecting the digital watermark signal from within the imagery;
• determining the edges within of the artwork, the determined edges providing a reference;
• utilizing the reference and the digital watermark signal to generate pose information relative to the optical capture;
• and
• providing the pose information as an input to a homography generator.