In an image reproducing method capable of displaying annotations in
virtual space constituted by a group of real panoramic images, if an
object for which an annotation is to be displayed falls within the field
of view at the position of the observer, the object is adopted as the
display position of the annotation. If the object is not within the field
of view, then the direction of forward travel of the observer is adopted
as the annotation display position. If the object is in a state of
transition, then the annotation display position is decided by
interpolation.