Abstract: A new method of virtual walkthrough using image-based rendering with polygonal
panoramic mosaics is presented. First, we take pictures and get multiple panoramas with ordinary
handhold camera along a route or in a square region. Second, we use SIFT feather points detection
to get slim images with depth which can be used in interpolation for the rendering of new view
point. The algorithm proposed in this method is very efficient for virtual walkthrough in the large
outdoor scene. The construction and rendering process with multiple panoramas is easy to
implement and the data capturing is simple without expensive equipments.

Key words: virtual walkthrough, image-based rending, panoramic mosaic, slim image