• Title/Summary/Keyword: adversarial machine learning

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A Study on Image Creation and Modification Techniques Using Generative Adversarial Neural Networks (생성적 적대 신경망을 활용한 부분 위변조 이미지 생성에 관한 연구)

  • Song, Seong-Heon;Choi, Bong-Jun;Moon, M-Ikyeong
    • The Journal of the Korea institute of electronic communication sciences
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    • v.17 no.2
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    • pp.291-298
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    • 2022
  • A generative adversarial network (GAN) is a network in which two internal neural networks (generative network and discriminant network) learn while competing with each other. The generator creates an image close to reality, and the delimiter is programmed to better discriminate the image of the constructor. This technology is being used in various ways to create, transform, and restore the entire image X into another image Y. This paper describes a method that can be forged into another object naturally, after extracting only a partial image from the original image. First, a new image is created through the previously trained DCGAN model, after extracting only a partial image from the original image. The original image goes through a process of naturally combining with, after re-styling it to match the texture and size of the original image using the overall style transfer technique. Through this study, the user can naturally add/transform the desired object image to a specific part of the original image, so it can be used as another field of application for creating fake images.

A Research on Adversarial Example-based Passive Air Defense Method against Object Detectable AI Drone (객체인식 AI적용 드론에 대응할 수 있는 적대적 예제 기반 소극방공 기법 연구)

  • Simun Yuk;Hweerang Park;Taisuk Suh;Youngho Cho
    • Journal of Internet Computing and Services
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    • v.24 no.6
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    • pp.119-125
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    • 2023
  • Through the Ukraine-Russia war, the military importance of drones is being reassessed, and North Korea has completed actual verification through a drone provocation towards South Korea at 2022. Furthermore, North Korea is actively integrating artificial intelligence (AI) technology into drones, highlighting the increasing threat posed by drones. In response, the Republic of Korea military has established Drone Operations Command(DOC) and implemented various drone defense systems. However, there is a concern that the efforts to enhance capabilities are disproportionately focused on striking systems, making it challenging to effectively counter swarm drone attacks. Particularly, Air Force bases located adjacent to urban areas face significant limitations in the use of traditional air defense weapons due to concerns about civilian casualties. Therefore, this study proposes a new passive air defense method that aims at disrupting the object detection capabilities of AI models to enhance the survivability of friendly aircraft against the threat posed by AI based swarm drones. Using laser-based adversarial examples, the study seeks to degrade the recognition accuracy of object recognition AI installed on enemy drones. Experimental results using synthetic images and precision-reduced models confirmed that the proposed method decreased the recognition accuracy of object recognition AI, which was initially approximately 95%, to around 0-15% after the application of the proposed method, thereby validating the effectiveness of the proposed method.

Comparison Analysis on Automatic Coloring System Algorithm Using Machine Learning (머신러닝을 활용한 자동 채색 시스템 알고리즘 비교 분석)

  • Lee, song eun;Lee, Ji Yeon;Kim, Na Heon;Kim, Jin Hwan
    • Proceedings of the Korea Information Processing Society Conference
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    • 2017.11a
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    • pp.792-794
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    • 2017
  • 현재 머신러닝(Machine Learning) 기술은 기존의 머신러닝과 조합 및 변형 되어 조금 더 발전 된 형태로 연구되어지고 있다. 따라서 수많은 알고리즘이 개발되고 있는 시점이다. 본 연구는 최근 좋은 결과로 관심을 받고있는 GAN(Generative Adversarial Net)을 중심으로 IT기술의 머신러닝과 그림을 조합하여 자동채색을 목적으로 GAN 알고리즘을 비교하고 분석하고자 한다. GAN 알고리즘들 가운데서 'Conditional GAN'과 'Wasserstein GAN'을 사용하여 자동채색을 적용시켰고, 가장 부합한 알고리즘을 찾고 성능을 비교하여 어떠한 알고리즘이 '자동채색' 목적에 더 부합한지 비교하고 판단 한다.

Anomaly Detection of Generative Adversarial Networks considering Quality and Distortion of Images (이미지의 질과 왜곡을 고려한 적대적 생성 신경망과 이를 이용한 비정상 검출)

  • Seo, Tae-Moon;Kang, Min-Guk;Kang, Dong-Joong
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.3
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    • pp.171-179
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    • 2020
  • Recently, studies have shown that convolution neural networks are achieving the best performance in image classification, object detection, and image generation. Vision based defect inspection which is more economical than other defect inspection, is a very important for a factory automation. Although supervised anomaly detection algorithm has far exceeded the performance of traditional machine learning based method, it is inefficient for real industrial field due to its tedious annotation work, In this paper, we propose ADGAN, a unsupervised anomaly detection architecture using the variational autoencoder and the generative adversarial network which give great results in image generation task, and demonstrate whether the proposed network architecture identifies anomalous images well on MNIST benchmark dataset as well as our own welding defect dataset.

Using artificial intelligence to detect human errors in nuclear power plants: A case in operation and maintenance

  • Ezgi Gursel ;Bhavya Reddy ;Anahita Khojandi;Mahboubeh Madadi;Jamie Baalis Coble;Vivek Agarwal ;Vaibhav Yadav;Ronald L. Boring
    • Nuclear Engineering and Technology
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    • v.55 no.2
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    • pp.603-622
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    • 2023
  • Human error (HE) is an important concern in safety-critical systems such as nuclear power plants (NPPs). HE has played a role in many accidents and outage incidents in NPPs. Despite the increased automation in NPPs, HE remains unavoidable. Hence, the need for HE detection is as important as HE prevention efforts. In NPPs, HE is rather rare. Hence, anomaly detection, a widely used machine learning technique for detecting rare anomalous instances, can be repurposed to detect potential HE. In this study, we develop an unsupervised anomaly detection technique based on generative adversarial networks (GANs) to detect anomalies in manually collected surveillance data in NPPs. More specifically, our GAN is trained to detect mismatches between automatically recorded sensor data and manually collected surveillance data, and hence, identify anomalous instances that can be attributed to HE. We test our GAN on both a real-world dataset and an external dataset obtained from a testbed, and we benchmark our results against state-of-the-art unsupervised anomaly detection algorithms, including one-class support vector machine and isolation forest. Our results show that the proposed GAN provides improved anomaly detection performance. Our study is promising for the future development of artificial intelligence based HE detection systems.

Application of Deep Learning: A Review for Firefighting

  • Shaikh, Muhammad Khalid
    • International Journal of Computer Science & Network Security
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    • v.22 no.5
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    • pp.73-78
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    • 2022
  • The aim of this paper is to investigate the prevalence of Deep Learning in the literature on Fire & Rescue Service. It is found that deep learning techniques are only beginning to benefit the firefighters. The popular areas where deep learning techniques are making an impact are situational awareness, decision making, mental stress, injuries, well-being of the firefighter such as his sudden fall, inability to move and breathlessness, path planning by the firefighters while getting to an fire scene, wayfinding, tracking firefighters, firefighter physical fitness, employment, prediction of firefighter intervention, firefighter operations such as object recognition in smoky areas, firefighter efficacy, smart firefighting using edge computing, firefighting in teams, and firefighter clothing and safety. The techniques that were found applied in firefighting were Deep learning, Traditional K-Means clustering with engineered time and frequency domain features, Convolutional autoencoders, Long Short-Term Memory (LSTM), Deep Neural Networks, Simulation, VR, ANN, Deep Q Learning, Deep learning based on conditional generative adversarial networks, Decision Trees, Kalman Filters, Computational models, Partial Least Squares, Logistic Regression, Random Forest, Edge computing, C5 Decision Tree, Restricted Boltzmann Machine, Reinforcement Learning, and Recurrent LSTM. The literature review is centered on Firefighters/firemen not involved in wildland fires. The focus was also not on the fire itself. It must also be noted that several deep learning techniques such as CNN were mostly used in fire behavior, fire imaging and identification as well. Those papers that deal with fire behavior were also not part of this literature review.

Improved CycleGAN for underwater ship engine audio translation (수중 선박엔진 음향 변환을 위한 향상된 CycleGAN 알고리즘)

  • Ashraf, Hina;Jeong, Yoon-Sang;Lee, Chong Hyun
    • The Journal of the Acoustical Society of Korea
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    • v.39 no.4
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    • pp.292-302
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    • 2020
  • Machine learning algorithms have made immense contributions in various fields including sonar and radar applications. Recently developed Cycle-Consistency Generative Adversarial Network (CycleGAN), a variant of GAN has been successfully used for unpaired image-to-image translation. We present a modified CycleGAN for translation of underwater ship engine sounds with high perceptual quality. The proposed network is composed of an improved generator model trained to translate underwater audio from one vessel type to other, an improved discriminator to identify the data as real or fake and a modified cycle-consistency loss function. The quantitative and qualitative analysis of the proposed CycleGAN are performed on publicly available underwater dataset ShipsEar by evaluating and comparing Mel-cepstral distortion, pitch contour matching, nearest neighbor comparison and mean opinion score with existing algorithms. The analysis results of the proposed network demonstrate the effectiveness of the proposed network.

Real-time transmission of 3G point cloud data based on cGANs (cGANs 기반 3D 포인트 클라우드 데이터의 실시간 전송 기법)

  • Shin, Kwang-Seong;Shin, Seong-Yoon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.23 no.11
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    • pp.1482-1484
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    • 2019
  • We present a method for transmitting 3D object information in real time in a telepresence system. Three-dimensional object information consists of a large amount of point cloud data, which requires high performance computing power and ultra-wideband network transmission environment to process and transmit such a large amount of data in real time. In this paper, multiple users can transmit object motion and facial expression information in real time even in small network bands by using GANs (Generative Adversarial Networks), a non-supervised learning machine learning algorithm, for real-time transmission of 3D point cloud data. In particular, we propose the creation of an object similar to the original using only the feature information of 3D objects using conditional GANs.

A Lightweight Deep Learning Model for Line-Art Colorization Using Two Stage Generator Model (이중 생성자를 사용한 저용량 선화 자동채색 모델)

  • Lee, Yeongseop;Lee, Seongjin
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2020.01a
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    • pp.19-20
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    • 2020
  • 미디어 산업의 발전으로 스토리보드와 같은 선화 이미지의 자동채색 연구가 국내외에서 진행되고 있다. 하지만 자동채색 모델 용량에 초점을 두는 연구는 아직 진행되고 있지 않다. 기존 자동채색 연구는 모델 용량이 최소 567MB 이상으로 모델 용량이 큰 단점을 가지고 있다. 본 논문에서는 채색을 2단계로 나누는 이중 생성자 구조와 기존 U-Net을 개선한 생성자를 사용해 기존 U-Net에 비해 30%, VGG16/19를 사용한 기법과 비교해 최대 85% 작은 106MB 모델을 생성했고 FID(Fréchet Inception Distance)를 통한 이미지 평가결과 512x512px에서 153.69의 채색성능을 얻었다.

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GAN System Using Noise for Image Generation (이미지 생성을 위해 노이즈를 이용한 GAN 시스템)

  • Bae, Sangjung;Kim, Mingyu;Jung, Hoekyung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.24 no.6
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    • pp.700-705
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    • 2020
  • Generative adversarial networks are methods of generating images by opposing two neural networks. When generating the image, randomly generated noise is rearranged to generate the image. The image generated by this method is not generated well depending on the noise, and it is difficult to generate a proper image when the number of pixels of the image is small In addition, the speed and size of data accumulation in data classification increases, and there are many difficulties in labeling them. In this paper, to solve this problem, we propose a technique to generate noise based on random noise using real data. Since the proposed system generates an image based on the existing image, it is confirmed that it is possible to generate a more natural image, and if it is used for learning, it shows a higher hit rate than the existing method using the hostile neural network respectively.