Abstract
Construction target monitoring became one of the key concerns of the construction field. Computer vision based monitoring methods like 2D image, video and 3D laser scan methods have difficulties in meeting real-time and data objectivity requirements. This paper points out the applicability of high resolution remote sensing image (HRRSI) in this task. This paper proposes a way for enhancing Histogram of Gradients (HOG) feature for HRRSI. HOG is applied as the key feature for machine learning, which is carried out by the boosting method. To overcome the complexity of HOGs in HRRSIs, this paper builds a feature framework according to the top, side and height characteristics of engineering ground objects. Based on the feature framework, this paper presents a HRRSI based framework for construction progress monitoring. Through an application case, the performance of the framework is presented. Judging from the result, this method is robust under different seasonal and illuminative conditions.
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