Acutance

Unprocessed, slight unsharp masking, then strong unsharp masking.

Low-pass filtering and resampling affect acutance.

In photography, the term "acutance" describes a subjective perception of sharpness that is related to the edge contrast of an image. Acutance is related to the amplitude of the derivative of brightness with respect to space. Due to the nature of the human visual system, an image with higher acutance appears sharper even though an increase in acutance does not increase real resolution.

单词	Critical sharpness
释义	Critical sharpness 英语百科 Acutance In photography, the term "acutance" describes a subjective perception of sharpness that is related to the edge contrast of an image. Acutance is related to the amplitude of the derivative of brightness with respect to space. Due to the nature of the human visual system, an image with higher acutance appears sharper even though an increase in acutance does not increase real resolution.
随便看	movable reflector movable refrigerator movable relieving hook movable reservation system movable reserve movable rig movable rocker bearing movable rocket engine movable roll index movable rubber belt conveyor movables movable sand heap movables and immovables account movable scaffold movable scaffolding movable scale barometer movable scene movable scotch blocks, signal, point movable screw conveyor movable section movable shear blade movable shelf movable side guards movable sieve jig movable sign

Critical sharpness

Acutance