효율적인 균열 데이터 수집을 위한 벡터 기반 데이터 증강과 네트워크 학습
Vector-Based Data Augmentation and Network Learning for Efficient Crack Data Collection
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초록
본 논문에서는 균열을 감지 할 때 필요한 데이터를 생성할 수 있는 벡터 기반 증강 기법과 이를 학습할 수 있는 합성곱인공신경망(Convolution Neural Networks, ConvNet) 기법을 제안한다. 균열을 빠르고 정확하게 감지하는 것은 건물 붕괴와 낙하 사고를 사전에 방지할 수 있는 중요한 기술이다. 이 문제를 인공지능으로 해결하기 위해서는 대량의 데이터확보가필수적이지만,실제균열이미지를얻기위한상황은대부분위험하기때문에대량의균열데이터를확보하기는어렵다.이런데이터베이스구축의문제점은인위적인특정부분에변형을주어데이터의양을늘리는탄성왜곡(Elastic distortion)으로 완화시킬 수 있지만, 본 논문에서는 이보다 향상된 균열 패턴 결과를 ConvNet을 활용하여 모델링한다. 탄성왜곡보다 우리의 방법이 실제 균열 패턴과 유사하게 추출된 결과를 얻을 수 있었고, 일반적인 데이터 증강에서사용되는 픽셀 단위가 아닌, 벡터 기반으로 균열 데이터 증강을 설계함으로써 균열의 변화량 측면에서 우수한 결과를얻을 수 있다. 결과적으로 본 논문에서는 적은 개수의 균열 데이터를 입력으로 사용했음에도 불구하고 균열의 방향 및패턴을다양하게생성하여효율적으로균열데이터베이스를구축할수있다.
Abstract
In this paper, we propose a vector-based augmentation technique that can generate data required for crack detection and a ConvNet( Convolutional Neural Network) technique that can learn it. Detecting cracks quickly and accurately is an important technology to prevent building collapse and fall accidents in advance. In order to solve this problem with artificial intelligence, it is essential to obtain a large amount of data, but it is difficult to obtain a large amount of crack data because the situation for obtaining an actual crack image is mostly dangerous. This problem of database construction can be alleviated with elastic distortion, which increases the amount of data by applying deformation to a specific artificial part. In this paper, the improved crack pattern results are modeled using ConvNet. Rather than elastic distortion, our method can obtain results similar to the actual crack pattern. By designing the crack data augmentation based on a vector, rather than the pixel unit used in general data augmentation, excellent results can be obtained in terms of the amount of crack change. As a result, in this paper, even though a small number of crack data were used as input, a crack database can be efficiently constructed by generating various crack directions and patterns.
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