Uncertainty of Object-Based Image Analysis for Drone Survey Images

Abstract

With the recent developments in the acquisition of images using drone systems, object- based image analysis (OBIA) is widely applied to such high-resolution images. There-fore, it is expected that the application of drone survey images would benefit from studying the uncertainty of OBIA. The most important source of uncertainty is image segmentation, which could significantly affect the accuracy at each stage of OBIA. Therefore, the trans-scale sensitivity of several spatial autocorrelation measures optimizing the segmentation was investigated, including the intrasegment variance of the regions, Moran ’ s I autocorrelation index, and Geary ’ s C autocorrelation index. Subse-quently, a top-down decomposition scheme was presented to optimize the segmented objects derived from multiresolution segmentation (MRS), and its potential was exam-ined using a drone survey image. The experimental results demonstrate that the pro- posed strategy is able to effectively improve the segmentation of drone survey images of urban areas or highly consistent areas.