Patent attributes
This disclosure relates to advanced image signal processing technology including encoded signals and digital watermarking. One implementation is directed to a method comprising: obtaining data representing a color area; determining that the data representing the color area, or information obtained by using the data representing the color area, indicates that the color area comprises a reflectivity of 15 percent (%) or less at or around 660 nm; generating an encoded signal, the encoded signal comprising a pattern including signal elements at various spatial locations corresponding to the color area; generating holes in the color area according to the pattern, said generating holes yield an encoded color area; and selecting a fill color for placement within the holes of the encoded color area, said selecting utilizing an encoded signal error that is associated with the color area, the fill color, and a reflectance difference at or around 660 nm between the color area and the fill color, said selecting also utilizing a color error that is associated with the color area, the fill color, and the reflectance difference. Of course, other implementations, methods, packages, systems and apparatus are described in this patent document.
