frame|An image with artificially increased acutance thumb|Another illustration, where Overshoot (signal)|overshoot caused by using [[unsharp masking to sharpen the image (bottom half) increases acutance.]]
frame|An image with artificially increased acutance thumb|Another illustration, where Overshoot (signal)|overshoot caused by using [[unsharp masking to sharpen the image (bottom half) increases acutance.]]
In photography, acutance describes a subjective perception of visual acuity that is related to the edge contrast of an image. Acutance is related to the magnitude of the gradient of brightness. 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.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).