MediaWiki:Exif-spatialfrequencyresponse/qqq

Spatial frequency is the number of edges per degree of the visual angle. The human eye scans the viewed scenary for edges and uses these edges to detect what it sees. Few edges make it hard to recognize the seen objects, but many edges do so too. A rate of about 4 to 6 edges per degree of the viewing range is seen as optimal for the recognition of objects.

Spatial frequency response is a measure for the capability of camera lenses to depict spatial frequencies.