Abstract: The present invention relates to a method of converting two-dimensional images into three-dimensional images. In the present invention, a first image which forms the basis and a second image obtained by horizontally shifting the first image are produced from the original two-dimensional image. One of the first image and the second image is taken as a left eye image, and the other image is taken as a right eye image. If the left eye image and the right eye image obtained are displayed on a display almost simultaneously, and the left eye image and the right eye image displayed are viewed with the left eye and the right eye of a viewer, therefore, the original two-dimensional image is recognized as an image having a three-dimensional effect by the viewer even when it is a still image.

Abstract: A two-dimensional image which is constitute by a plurality of frame images which are continuous in time is taken as an image for one eye, while a two-dimensional image obtained by shifting the frame image by N frames (N includes zero and is not fixed), thereby to produce a three-dimensional image. For example, the two-dimensional image is not changed, that is, the frame difference (N) is adjusted to "0" with respect to a portion of the two-dimensional image whose content is not easily converted into a three-dimensional image, while the frame difference (N) is adjusted to (N) larger than (N) for a normal three-dimensional image with respect to a portion of the two-dimensional image whose content is very easily converted into a three-dimensional image, thereby to give further three-dimensional feeling to a viewer as well as reduce the fatigue of the eyes of the viewer.