Abstract
Autonomous mortar raking requires a computer vision system which is able to provide accurate segmentation masks of close-range images of brick walls. The goal is to detect and ultimately remove the mortar, leaving the bricks intact, thus automating this construction-related task. This paper proposes such a vision system based on the combination of machine learning algorithms. The proposed system fuses the individual segmentation outputs of eight classifiers by means of a weighted voting scheme and then performing a threshold operation to generate the final binary segmentation. A novel feature of this approach is the fusion of several segmentations using a low-cost commercial off-the-shelf hardware setup. The close-range brick wall segmentation capabilities of the system are demonstrated on a total of about 9 million data points.
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Acknowledgment
The authors would like to thank the company Robot At Work for offering their collaboration to solve the mortar raking problem. Furthermore, we thank Rune Hansen, Finn Christensen, and Kasper Laursen from Robot At Work for their support and contribution to the project.
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Kajatin, R., Nalpantidis, L. (2021). Image Segmentation of Bricks in Masonry Wall Using a Fusion of Machine Learning Algorithms. In: Del Bimbo, A., et al. Pattern Recognition. ICPR International Workshops and Challenges. ICPR 2021. Lecture Notes in Computer Science(), vol 12667. Springer, Cham. https://doi.org/10.1007/978-3-030-68787-8_33
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