Accumulated Error Correction of Strip Stereo Models Connection without GCPs

Abstract

The commonly used accumulated error correction of strip stereo models connection need a number of GCPs(Ground Control Points), which is unsuitable for low-altitude photogrammetry with a large number of images. In this paper, a novel approach of accumulated error correction of strip stereo models connection without GCPs was proposed. The accumulated error is adjusted by changing reference image and nonlinear polynomial method. Firstly the middle image of a strip is used as reference image. Then the accumulated error of baseline parameters are adjusted by inverse distance weighted method. Finally the rotation angles of relative orientation are adjusted by polynomial formula between the fitted angles and ideal statistics. Experimental results show that the approach is effective and practical, and can significantly reduce the distortion and accumulated error of model connection, may be suitable to implement strip aerial triangulation in low-altitude photogrammetry.