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A watermark is an identifying image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, atop a dark background), caused by thickness or density variations in the paper. [1]
A digital watermark is called robust with respect to transformations if the embedded information may be detected reliably from the marked signal, even if degraded by any number of transformations.
The Spanish Water Dog (perro de agua español) breed is used in Spain as a general purpose sheepdog and guard. It is also used sometimes as a gundog , and is skilled at retrieval from water. Description
Marca (Spanish pronunciation:), stylised as MARCA, is Spain's national daily tabloid sport newspaper owned by Unidad Editorial. The newspaper focuses primarily on football , in particular the day-to-day activities of Real Madrid , FC Barcelona , and Atlético Madrid .