• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.233-236
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• 2021

본 논문에서는 국내 드론 사용량이 증가하고 있으나 드론을 제재하기 위한 수단과 AI를 활용한 드론 콘텐츠가 부족하다. 상기 문제점을 해결하기 위해 Darknet 과 YOLO_mark를 사용하여 디바이스를 학습시켜 손쉽게 드론 인식 및 구별을 할 수 있게 구현하였다. 이를 통해 기존 드론 제재 수단의 한계를 극복하고 손쉽게 이용할 수 있다. 나아가 본 논문을 이용하여 군◦경에서 드론 식별 등으로 활용할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.382-384
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• 2021

In this study, we implement a system that automatically classifies types of plastics using YOLO (You Only Look Once), a real-time object recognition algorithm. The system consists of Nvidia jetson nano, a small computer for deep learning and computer vision, with model trained to recognize plastic separation emission marks using YOLO. Using a webcam, recycling marks of plastic waste were recognized as PET, HDPE, and PP, and motors were adjusted to be classified according to the type. By implementing this automatic classifier, it is convenient in that it can reduce the labor of separating and discharging plastic separation marks by humans and increase the efficiency of recycling through accurate recycling.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.11a
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• pp.869-871
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• 2022

현재 사회적 문제로 잘못된 자원 재활용 방법 및 경비 노동자 근로 환경 개선 필요성이 지속해서 대두되고 있으며, 최근 발생한 코로나바이러스로 인하여 배달 음식의 수요가 증가하여 각 가정에서 배출되는 쓰레기의 양이 매우 증가하였다. 이러한 사회적 문제를 효율적으로 대처하기 위하여 본 논문에서는 분리수거가 가능한 사물을 인식하여 AI 모듈로 객체 정보를 전송하고 전송된 정보에 따라 적절한 분리수거를 수행하는 스마트 분리수거 자동화 시스템을 개발하였다. 본 연구에서는 잘못된 객체 정보 전송을 최소화하고, 객체 인식률의 정확도를 높이기 위하여 많은 종류의 Custom dataset을 Yolo_Mark, Scaling Annoter Tool을 이용하여 직접 라벨링 하였으며 K-means Clustering 알고리즘을 적용하여 더욱 정확한 분리수거 자동화 시스템을 구현하였다. 본 연구를 바탕으로 불필요한 자원과 인력 낭비를 줄일 수 있으며, 인간이 아닌 시스템에 의해 통제되므로 더욱 정확한 분리수거가 가능하다.

• Journal of the Korea Society of Computer and Information
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• v.26 no.7
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• pp.19-27
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• 2021

In this paper, we propose a method for detecting characters in images and detecting facial regions, which consists of two tasks. First, we separate two different characters to detect the face position of the characters in the frame. For fast detection, we use You Only Look Once (YOLO), which finds faces in the image in real time, to extract the location of the face and mark them as object detection boxes. Second, we present three image processing methods to detect accurate face area based on object detection boxes. Each method uses HSV values extracted from the region estimated by the detection figure to detect the face region of the characters, and changes the size and shape of the detection figure to compare the accuracy of each method. Each face detection method is compared and analyzed with comparative data and image processing data for reliability verification. As a result, we achieved the highest accuracy of 87% when using the split rectangular method among circular, rectangular, and split rectangular methods.

• Journal of Broadcast Engineering
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• v.26 no.2
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• pp.184-196
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• 2021

This paper proposes statistics adaptive linear regression-based object size prediction method for object detection. YOLOv2 and YOLOv3, which are typical deep learning-based object detection algorithms, designed the last layer of a network using statistics adaptive exponential regression model to predict the size of objects. However, an exponential regression model can propagate a high derivative of a loss function into all parameters in a network because of the property of an exponential function. We propose statistics adaptive linear regression layer to ease the gradient exploding problem of the exponential regression model. The proposed statistics adaptive linear regression model is used in the last layer of the network to predict the size of objects with statistics estimated from training dataset. We newly designed the network based on the YOLOv3tiny and it shows the higher performance compared to YOLOv3 tiny on the UFPR-ALPR dataset.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.6
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• pp.2086-2097
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• 2021

The current cultural assets are being restored depending on the opinions of experts (craftsmen). We intend to introduce digitalized artificial intelligence techniques, excluding the personal opinions of experts on reconstruction of such cultural properties. The first step toward restoring digitized cultural properties is separation. The restoration of cultural properties should be reorganized based on recorded documents, period historical backgrounds and regional characteristics. The cultural properties in the form of photographs or images should be collected by separating the background. In addition, when restoring cultural properties most of them depend a lot on the tendency of the restoring person workers. As a result, it often occurs when there is a problem in the accuracy and reliability of restoration of cultural properties. In this study, we propose a search method for learning stored digital cultural assets using AI technology. Pagoda was selected for restoration of Cultural Properties. Pagoda data collection was collected through the Internet and various historical records. The pagoda data was classified by period and region, and grouped into similar buildings. The collected data was learned by applying the well-known CNN algorithm for artificial intelligence learning. The pagoda search used Yolo Marker to mark the tower shape. The tower was used a total of about 100-10,000 pagoda data. In conclusion, it was confirmed that the probability of searching for a tower differs according to the number of pagoda pictures and the number of learning iterations. Finally, it was confirmed that the number of 500 towers and the epochs in training of 8000 times were good. If the test result exceeds 8,000 times, it becomes overfitting. All so, I found a phenomenon that the recognition rate drops when the enemy repeatedly learns more than 8,000 times. As a result of this study, it is believed that it will be helpful in data gathering to increase the accuracy of tower restoration.