A Stereo Pair Selection Method for DEM from Satellite Image Archive

Abstract

To create a DEM using satellite images, correspondence detection in a stereo pair is operated. For a stereo pair, two or more in-track images are used for most cases. To use images between different orbits for a stereo pair, there are some subject about parallax, time difference, and environment. In this paper, we propose a selection method of stereo pairs for creating a precise DEM. Our method uses parallax, time difference and similarity between satellite images. And our method selects stereo pairs for every points for calculating height. We evaluate our method using ALOS/PRISM images, and the result shows the DEM provided by our method using different track images has almost same precision in comparison with the computed one using in-track images.