opencv2 → img_hash Relation

File in opencv2	Includes file in opencv2/img_hash
img_hash.hpp	average_hash.hpp
img_hash.hpp	block_mean_hash.hpp
img_hash.hpp	color_moment_hash.hpp
img_hash.hpp	marr_hildreth_hash.hpp
img_hash.hpp	phash.hpp
img_hash.hpp	radial_variance_hash.hpp