Classifiers ensemble of transfer learning for improved drill wear classification using convolutional neural network

Author:

Kurek JarosławORCID,Aleksiejuk-Gawron JoannaORCID,Antoniuk IzabellaORCID,Górski JarosławORCID,Jegorowa AlbinaORCID,Kruk MichałORCID,Orłowski ArkadiuszORCID,Pach JakubORCID,Świderski BartoszORCID,Wieczorek GrzegorzORCID

Abstract

In this paper we introduce the enhanced drill wear recognition method, based on classifiers ensemble, obtained using transfer learning and data augmentation methods. Red, green and yellow classes are used to describe the current drill state. The first one corresponds to the case when drill should be immediately replaced. The second one denotes a tool that is still in a good condition. The final class refers to the case when a drill is suspected of being worn out, and a human expert evaluation would be required. The proposed algorithm uses three different, pretrained network models and adjusts them to the drill wear classification problem. To ensure satisfactory results, each of the methods used was required to achieve accuracy above 90\% for the given classification task. Final evaluation is achieved by voting of all three classifiers. Since the initial data set was small (242 instances), the data augmentation method was used to artificially increase the total number of drill hole images. The experiments performed confirmed that the presented approach can achieve high accuracy, even with such a limited set of training data.

Publisher

Warsaw University of Life Sciences – SGGW Press

Subject

Computer Graphics and Computer-Aided Design,Computer Vision and Pattern Recognition,Software

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