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halftone dot shape

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halftone dot shape (In French tramage) variation of the AM halftone dot shape between circle/square/cushion/barrel and ellipse/chain, to distribute the so-called dot touch (meeting of the square dot edges in medium tone 50%) among the quarter and three-quarter tones and thus to avoid tone value breaks; alternatively FM: random dot size and distribution to avoid annoying patterns (moiré). The halftone dot shape has a significant influence on color rendering and is one of the parameters which, if changed, causes an ICC profile to lose its validity.