Posterization is a digital image processing technique which results in the conversion of a continuous gradation of tone to some areas of fewer tones, often causing dramatic changes from one colour tone to another.

Boyne Valley Private Day Tour

Immerse yourself in the rich heritage and culture of the Boyne Valley with our full-day private tours. Visit Newgrange World Heritage site, explore the Hill of Slane, where Saint Patrick famously lit the Paschal fire. Discover the Hill of Tara, the ancient seat of power for the High Kings of Ireland. Book Now