1. An apparatus comprising: a splitter configured to split light received from at least one subject into at least first and second components of light; a first imaging element configured to convert the first component of light into a first electrical signal representing a base image of the at least one subject; an optical arrangement configured to disperse the second component of light into at least a right component of light and a left component of light; a second imaging element configured to convert the right component of light into a second electrical signal representing a right detection image of the at least one subject at a first angle; and a third imaging element configured to convert the left component of light into a third electrical signal representing a left detection image of the at least one subject at a second angle different from the first angle.