RELATIVE ORIENTATION OF STEREO IMAGES FOR EPIPOLAR IMAGE RESAMPLING WITHOUT ANY GROUND CONTROL POINT

摘要

Stereo satellite images should be precisely resampled for the epipolar images that achieve near zero y-parallax and make x-parallax linearly proportional to the ground height. The image providers support RPCs (Rational Polynomial Coefficients) that are not precise enough such that the relative orientation of stereo images is required without any GCP (Ground Control Point). We extracted conjugate points from stereo images to reconstruct their ground coordinates, i.e., quasi-GCPs, using the provided RPCs based on the stereo matching. The quasi-GCPs are back projected into the image spaces to relatively refine the RPCs. The experimental results on Kompsat-2 data showed less than a pixel of y-parallax was observable.