There’s no mistaking a Meatyard photograph. Ralph Eugene Meatyard (1925-1972) was an eccentric in line with oddball American artists in other media: Emily Dickinson in poetry, Albert Pinkham Ryder in painting, Charles Ives in music. “The Family Album of Ralph Eugene Meatyard” at the High Museum of Art through May 10 is a good introduction to his unique practice. Appropriately, Gregory Harris, curator of photography at the High, arranged for the gallery where the 36 black-and-white prints are displayed to be painted an unusual way: The walls are dark gray halfway up and white from there to the ceiling. The small-format prints straddle the two colors.