Parametric Model of Pipe Defect Description for Generation of Training Set for Machine Learning in Data-Poor Conditions

The article addresses the problem of the lack of real data in training and testing of machine learning algorithms. The issue is presented below through the case of identifying the defect on the pipe inner surface. In this paper, the authors present approaches to the formation of a training set using synthetic images obtained from various sources. The article considers in detail the method of image generation based on the recommended parametric representation of the defect on the inner surface of a pipe. For the defect description, the following parameters were selected: area coefficient, HSV color model, texture, shape and boundary of the defect. The determination of each of the selected parameters is described in the paper. The experimental results on the synthetic image generation based on parametric representation of the defect using the developed software in the Matlab environment are noted. The article considers the method of detecting defects on the inner surface of the pipe using the presented defect parametric description. Based on the developed model, there was formed a sample of tube images for the neural network training and testing.