ACUTANCE
[Film Technology]
[Film Technology]
In Film technology measure of sharpness
at image edges. Acutance corresponds most
closely with the subjective idea of sharpness. A micro
densitometer is used to trace the density
variations across an abrupt light-to-darkness edge. The density changing is
never instantaneous. A more rapid in rise in density corresponds to a sharper image. The adjacency effect-fringing,
on outlining, caused by poor-developer-agitation-actually steepens contrast of sharp edges and improves acutance.
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