• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2022.11a
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• pp.82-84
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• 2022

최근 자율주행에서 안전한 주행을 위해 영상 기반 다중객체 검출 기술이 활발히 연구되고 있다. 이때, 저해상도 영상은 객체 검출 단계에서 정확도가 떨어지는 한계가 있다. 본 논문에서는 이러한 문제점을 해결하기 위해 초해상화와 객체 검출을 위한 방법을 함께 사용하는 기법을 제안한다. 더 나아가 초해상화 단계에서 하나의 구분자만 사용하는 기존의 방법과 다르게 이미지 생성 과정 중간에서 추가의 구분자를 사용하여 총 두 개의 구분자를 사용하여 성능을 향상하고자 하였다. 본 논문은 한국 고속도로 교통 데이터를 사용하여 실험하였으며, 그 결과 제안된 방법의 성능이 mAP@0.5 및 F1 점수 측면에서 기존 방법보다 우수하다는 것을 확인하였다.

• Journal of Broadcast Engineering
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• v.28 no.1
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• pp.124-131
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• 2023

Object detection techniques are increasingly used to obtain information on physical characteristics or situations of a specific area from remote images. The accuracy of object detection is decreased in remote sensing images with low resolution because the low resolution reduces the amount of detail that can be captured in an image. A single neural network is proposed to joint the super-resolution method and object detection method. The proposed method constructs a deep residual-based network to restore object features in low-resolution images. Moreover, the proposed method is used to improve the performance of object detection by jointing a single network with YOLOv5. The proposed method is experimentally tested using VEDAI data for low-resolution images. The results show that vehicle detection performance improved by 81.38% on mAP@0.5 for VISIBLE data.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.11a
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• pp.117-118
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• 2018

본 논문에서는 작은 객체를 검출하기 위한 수정 된 YOLOv3-tiny 를 제안한다. 컴퓨터 비전에서 작은 객체 검출은 제한된 해상도와 정보로 검출하기 어렵다. 이 문제를 해결하기 위해 기존 방법의 대부분은 높은 정확도 향상을 위해 속도를 희생한다. 본 논문은 정확도와 속도가 균형적인 성능을 통해 빠른 속도로 작은 객체를 검출하는 것을 목표로 한다. 실험은 WIDER FACE 와 자체 수집한 데이터베이스에서 기존 YOLOv3-tiny 보다 높은 87.48% mAP 를 얻었으며, 속도는 각각 100.5FPS 로 YOLOv3-tiny 보다는 느리지만 높은 정확도와 YOLOv3 보다는 빠르지만 낮은 정확도를 통해 균형적인 성능을 얻을 수 있다.

• Annual Conference of KIPS
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• 2015.10a
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• pp.1571-1572
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• 2015

본 논문에서는 GMM (Gaussian mixture model) 기반의 BS (background subtraction) 알고리즘을 이용한 이동 객체 검출기의 하드웨어 구조 설계 결과를 제시하였다. 설계된 이동객체 검출기는 1280 * 720 HD 해상도의 영상을 30 frames per second로 실시간 처리가 가능하다. 하드웨어 구현은 Verilog-HDL을 이용하였으며, FPGA 기반 구현 결과, 설계된 이동 객체 검출기는 582 Slice, 1,698 Slice LUT, 8 DSP48s, 1,769 Flip Flop, 691.2 KByte BRAM으로 구성되었음을 확인하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.6
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• pp.774-784
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• 2021

The object detection and recognition process is a very important task in the field of computer vision, and related research is actively being conducted. However, in the actual object recognition process, the recognition accuracy is often degraded due to the resolution mismatch between the training image data and the test image data. To solve this problem, in this paper, we designed and developed an integrated object recognition and super-resolution framework by proposing an image super-resolution technique to improve object recognition accuracy. In detail, 11,231 license plate training images were built by ourselves through web-crawling and artificial-data-generation, and the image super-resolution artificial neural network was trained by defining an objective function to be robust to the image flip. To verify the performance of the proposed algorithm, we experimented with the trained image super-resolution and recognition on 1,999 test images, and it was confirmed that the proposed super-resolution technique has the effect of improving the accuracy of character recognition.

• Journal of Internet Computing and Services
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• v.21 no.4
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• pp.117-126
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• 2020

A maritime object detection system is an intelligent assistance system to maritime autonomous surface ship(MASS). It detects automatically floating debris, which has a clash risk with objects in the surrounding water and used to be checked by a captain with a naked eye, at a similar level of accuracy to the human check method. It is used to detect objects around a ship. In the past, they were detected with information gathered from radars or sonar devices. With the development of artificial intelligence technology, intelligent CCTV installed in a ship are used to detect various types of floating debris on the course of sailing. If the speed of processing video data slows down due to the various requirements and complexity of MASS, however, there is no guarantee for safety as well as smooth service support. Trying to solve this issue, this study conducted research on the minimization of computation volumes for video data and the increased speed of data processing to detect maritime objects. Unlike previous studies that used the Hough transform algorithm to find the horizon and secure the areas of interest for the concerned objects, the present study proposed a new method of optimizing a binarization algorithm and finding areas whose locations were similar to actual objects in order to improve the speed. A maritime object detection system was materialized based on deep learning CNN to demonstrate the usefulness of the proposed method and assess the performance of the algorithm. The proposed algorithm performed at a speed that was 4 times faster than the old method while keeping the detection accuracy of the old method.

• Journal of Korea Multimedia Society
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• v.15 no.11
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• pp.1284-1291
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• 2012

Ship object detection is a technique to detect the existence and the location of ship when ship objects are shown on input image sequence, and there are wide variations in accuracy due to environmental changes and noise of input image. In order to solve this problem, in this paper, we propose multiple ship object detection based on background registration technique and morphology operation. The proposed method consists of the following five steps: background elimination step, noise elimination step, object standard position setting step, object restructure step, and multiple object detection steps. The experimental results show accurate and real-time ship detection for 15 different test sequences with a detection rate of 98.7%, and robustness against variable environment. The proposed method may be helpful as the base technique of sea surface monitoring or automatic ship sailing.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.97-99
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• 2022

Recently, the amount of data is increasing with the development of industries and technologies. Research on the processing and transmission of large amounts of data is attracting attention. Therefore, in this paper, compressed sensing was used to reduce the amount of data and its effect on Mask R-CNN algorithm was analyzed. We confirmed that as the compressed sensing rate increases, the amount of data in the image and the resolution decreases. However, it was confirmed that there was no significant degradation in the performance of object detection.

• Journal of Internet of Things and Convergence
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• v.9 no.1
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• pp.97-104
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• 2023

This paper is related to object segmentation using ESRGAN(Enhanced Super Resolution GAN) and SSS(Semantic Soft Segmentation). The segmentation performance of the object segmentation method using Mask R-CNN and SSS proposed by the research team in this paper is generally good, but the segmentation performance is poor when the size of the objects is relatively small. This paper is to solve these problems. The proposed method aims to improve segmentation performance of small objects by performing super-resolution through ESRGAN and then performing SSS when the size of an object detected through Mask R-CNN is below a certain threshold. According to the proposed method, it was confirmed that the segmentation characteristics of small-sized objects can be improved more effectively than the previous method.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.10
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• pp.1331-1340
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• 2020

Object detection in maritime means that the captain detects floating objects that has a risk of colliding with the ship using the computer automatically and as accurately as human eyes. In conventional ships, the presence and distance of objects are determined through radar waves. However, it cannot identify the shape and type. In contrast, with the development of AI, cameras help accurately identify obstacles on the sea route with excellent performance in detecting or recognizing objects. The computer must calculate high-volume pixels to analyze digital images. However, the CPU is specialized for sequential processing; the processing speed is very slow, and smooth service support or security is not guaranteed. Accordingly, this study developed maritime object detection software and implemented it with FPGA to accelerate the processing of large-scale computations. Additionally, the system implementation was improved through embedded boards and FPGA interface, achieving 30 times faster performance than the existing algorithm and a three-times faster entire system.