Technical term used in photography, imaging, and optics to describe how clearly details are rendered. Often used in contexts like 鮮鋭度が高い (high sharpness).
This lens has very high sharpness.
Adjust the sharpness of the image.
Compound of 鮮鋭 (せんえい, 'sharp, keen') and 度 (ど, 'degree'). The exact historical derivation is uncertain, but the term is used in modern technical fields.