1. An image capture method comprising: capturing image data of a scene; obtaining spectral profile information for the scene; accessing a database of plural spectral profiles each of which maps a material to a corresponding spectral profile reflected therefrom; matching the spectral profile information for the scene against the database; identifying materials for objects in the scene by using matches between the spectral profile information for the scene against the database; constructing metadata which identifies materials for objects in the scene; and embedding the metadata with the image data for the scene.