Focus evaluation value generation apparatus, focus evaluation value generation method, and computer-readable medium storing focus evaluation value generation program

摘要

A focus evaluation value generation apparatus includes a low frequency image data generation unit configured to generate low frequency image data, a thinned image generation unit configured to generate thinned input image data and thinned low frequency image data, and a focus evaluation value generation unit configured to generate the focus evaluation value based on the thinned input image data and the thinned low frequency image data.