The present invention provides a display control method and a display
control device capable of detecting a position and an orientation of an
apparatus by a simple structure and controlling a display of a displayed
image based on the detected position and orientation of the apparatus
with ease. Two cameras are mounted on the apparatus. A user holds the
apparatus in the hand, captures, by a first camera, a first image
including the face of the user, and captures, by a second camera, a
second image including a scene opposite to the user. A display control
unit extracts features of the face from the first image and extracts
scene feature points from the second image. Then, the display control
unit compares the extracted results with reference graphics and the like,
and calculates a user-to-apparatus distance ro and angles .theta.o,
.phi.o which indicate a direction to the apparatus, and controls the
display of the displayed image based on the calculated distance ro and
angles .theta.o, .phi.o.