Application of image recognition technology for monitoring construction progress
Date Issued
2009
Date
2009
Author(s)
Hsiao, Chung-Hui
Abstract
Although the 3D technology has been researched and developed during last two decades in construction industry, the application of 3D are still limited to the planning and designing stage of a construction project. 3D model are mainly used as visual-based tool for contractor to communicate with owner and prepare for bidding document. The schedule information in the 3D system cannot fulfill the need of monitoring the progress in the construction field because it cannot be updated in real time. This research tend to apply the well-developed image recognition and matching algorithms to compare different construction unit appearing in photos shoot in construction field with images retrieved from 3D as-planned model. The result of comparison can demonstrates the schedule difference in field and early planning expectation.he research is conducted as following procedure: 1. Identify the construction unit appearing in both field photos and 3D images. 2. Comparison of characteristic description of every object identified. 3. Decide the allowed error range for each description factors. 4. Examine real construction photos and establish visual-based construction progress monitoring model. n Taiwan, there are few researches related with visual-based progress monitoring in construction field. This research constructed a progress measurement model through semi-automatic comparison of field photos and 3D images applying image recognition technology. The results are expected to provide the project manager with real-time information about actual field completion percentage and automatic measurement of construction progress.
Subjects
construction image recognition,visual progress monitoring,construction automation
Type
thesis
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