Assertion: premultiplied alpha | /r/HasAspect | unique representation
Facets:
value: for transparent pixels
type: PURPOSE
Source sentences:
text: The only important difference is in the dynamic range of the colour representation in finite precision numerical calculations (which is in all applications): premultiplied alpha has a unique representation for transparent pixels, avoiding the need to choose a "clear color" or resultant artifacts such as edge fringes (see the next paragraphs).