acutance : Spreety TV Online Glossary
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acutance n. An objective measure of the physical
characteristics that influence a viewer’s subjective opinion of film image
sharpness. The concept of acutance was developed c. 1940 when it was realized
that simple lens resolving power does not necessarily correlate directly to perceived
image quality. Acutance is generally expressed as the change in density across
a film image as measured with a densitometer. See resolution.
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