• 한국공간구조학회논문집
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• 제19권4호
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• pp.103-110
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• 2019

The cable-based retractable membrane roof makes it impossible to maintain its shape and stiffness during driving process, unlike the hard-type retractable roof. Consequently, monitoring using a relatively simple wireless video transmission device is required. However, since video data has a bigger transmission rating than other monitoring data in terms of the structure velocity or acceleration, there is a need to develop transmission device that is easy to install and entails low maintenance cost. This paper studies on a real-time video transmission system for monitoring the cable-based retractable membrane roof while driving. A video transfer software, using the mobile network, is designed and the embedded system is constructed. Ultimately, the data transmission server is tested. Connecting a trolley to the system allows testing of the validity and efficiency of the developed system through the video data transmitted in the driving process. Result of the test shows that the developed system enables multi-device data transfer with monitoring via the mobile network.

• Journal of Advanced Marine Engineering and Technology
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• 제32권4호
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• pp.630-636
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• 2008

Monitoring the location of the shoreline and foreshore changes through the time and core tasks are carried out by coastal engineers for a wide range of research. With the advent of digital imaging technology, the shore-based video monitoring system provides many advantages than field surveys. This study presents the development and construction(installation) of video monitoring system to assist the study of coastal and shoreline dynamics and evolution, especially sandbar variation at the Nakdong river estuary. For the purpose of this study, at high building near the Dadea-po beach (St. 2) and Jinudo(island) (St. 1) foreshore region, where coastline variation is highly active, 5 video cameras installed; the coastline movement has monitored since Aug. 2007 using the systems. From the image results of video camera, the 'Spit' type sandbar appears at the foreshore region of Doyodeung and Dadea-po beach and measured the deposition process of Jinudo(island) foreshore region. As a result, the monitoring system using video-based technique built in this study would be able to identify changes in the area and width of shoreline and beach of Nakdong river estuary.

• 한국위성정보통신학회논문지
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• 제7권1호
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• pp.134-138
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• 2012

본 논문에서는 자동화 생산 시설물의 객체모니터링을 위해서 생산라인 현장의 상태 감시 모니터링이 가능한 시스템을 구현하고자하며, 효율성을 향상시키기 위해 영상추적필터를 이용한 CCTV 영상추적 기술을 제안하고자 한다. 이 시스템에서는 자동화 생산 시설물의 객체모니터링을 위해 기존에 일반적으로 사용되었던 영상모니터링 방식이 아닌 영상추적필터를 기반으로 소프트웨어를 구축하여 효율적이며, 신뢰성 있는 데이터 전달을 함으로써 PC 기반의 모니터링이 가능하게 한다. 그리고 실시간 상태 확인이 가능하도록 함으로써 관리자의 접근성과 편의성을 향상시켰다. 또한 제안한 모니터링 시스템에 영상추적필터를 적용한 시뮬레이션을 수행함으로써 성능개선효과를 확인하였으며, 제안한 시스템의 효율성과 유용성을 확인하였다.

• 전기학회논문지
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• 제56권1호
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• pp.206-213
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• 2007

In this paper, The monitoring system for TV advertisement is implemented using video watermark. The functions of the advertisement monitoring system are monitoring the time, length, and index of the on-air advertisement, saving the log data, and reporting the monitoring result. The performance of the video watermark used in this paper is tested for TV advertisement monitoring. This test includes LAB test and field test. LAB test is done in laboratory environment and field test in actually broadcasting environment. LAB test includes PSNR, distortion measure in image, and the watermark detection rate in the various attack environment such as AD/DA(analog to digital and digital to analog) conversion, noise addition, and MPEG compression. The result of LAB test is good for the TV advertisement monitoring. KOBACO and SBS are participated in the field test. The watermark detection rate is 100% in both the real-time processing and the saved the processing. The average deviation of the watermark detection time is 0.2 second, which is good because the permissible average error is 0.5 second.

• 한국해안해양공학회지
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• 제10권1호
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• pp.45-53
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• 1998

비디오_모니터링 기술 및 이의 해안에서의 적용에 대하여 검토하였다. 최근에 비디오 하드웨어 및 영상처리 기술의 발달로 인하여 비디오카메라를 이용한 해안선 변화, 연안 사주의 형태, 파의 쳐올림 및 스워쉬(swash)운동 등에 대한 관측이 가능해졌다 특히 영상의 디지털화(digitization),좌표수정(rectification)및 영상 처리과정을 통하여 비디오 영상으로부터 정량적인 정보를 얻을 수 있게 되었다. 비디오 모니터링 기술은, 비록 정밀도가 낮고 육지 및 해수 표면에 대한 정보만을 간접적으로 제공하지만, 기존의 관측 기술에 비해 훨씬 적은 비용으로 장기간의 관측을 가능하게 해 준다.

• 한국철도학회논문집
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• 제8권6호
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• pp.559-565
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• 2005

In this paper, we propose a stereoscopic video coding scheme for subway accident monitoring system. The proposed designed for providing flexible video among various displays, such ass control center, station employees and train driver. We uses MPEG-2 standard for coding the left-view sequence and IBMDC coding scheme predicts matching block by interpolating both motion and disparity predicted macroblocks. To provide efficient stereoscopic video service, we define both temporally and spatially scalable layers for each eye's-view by using the concept of Spatio-Temporal scalability. The experimental results show the efficiency of proposed coding scheme by comparison with already known methods and the advantages of disparity estimation in terms of scalability overhead. According to the experimental results, we expect the proposed functionalities will play a key role in establishing highly flexible stereoscopic video codec for ubiquitous display environment where devices and network connections are heterogeneous.

• 한국해양공학회지
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• 제31권1호
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• pp.60-68
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• 2017

In this study, we analyzed the real time video image obtained from the video monitoring system to grasp the shoreline, beach width, and area change of Haeundae beach. The video monitoring techniques enabled continuous monitoring for a long period at a much lower cost than general survey methods. It was possible to grasp quantitative beach variation characteristics of Haeundae beach through image acquisition, rectification, and image processing of video images. According to the monitoring results, the erosion rate of Haeundae beach in spring and summer was -19.8% in 2014 and -6.7% in 2015. The erosion rate in 2016 was -6.4%, which showed that the erosion rate in spring and summer continued to decrease. In particular, the influence of the erosion at the time of typhoon CHABA was revealed to be smaller than in the past. It can be concluded that these variations were due to beach width expansion by beach nourishment and the installation of submerged breakwaters.

• 한국멀티미디어학회논문지
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• 제25권4호
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• pp.583-599
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• 2022

Although the object detection accuracy with a single image has been significantly improved with the advance of deep learning techniques, the detection accuracy for pig monitoring is challenged by occlusion problems due to a complex structure of a pig room such as food facility. These detection difficulties with a single image can be mitigated by using a video data. In this research, we propose a method in pig detection for video monitoring environment with a static camera. That is, by using both image processing and deep learning techniques, we can recognize a complex structure of a pig room and this information of the pig room can be utilized for improving the detection accuracy of pigs in the monitored pig room. Furthermore, we reduce the execution time overhead by applying a pruning technique for real-time video monitoring on an embedded board. Based on the experiment results with a video data set obtained from a commercial pig farm, we confirmed that the pigs could be detected more accurately in real-time, even on an embedded board.

• 한국위성정보통신학회논문지
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• 제7권3호
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• pp.140-144
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• 2012

비디오 감시시스템의 영상 기록 및 검색을 위한 고전적 방법은 감시 영상만이 가지는 특징, 즉 감시영상에서 불필요한 배경 영역과 감시 대상을 목적으로 하는 물체 영역을 분리하여 저장하는 시스템을 갖추지 않으므로 감시영상의 저장 및 검색을 하는데 있어서 많은 저장 용량이 요구되기 때문에 매우 비효율적이다. 본 논문에서 제안한 감시 영상 시스템의 기록 및 검색 방법은 비효율적 요소를 해결한 시간별 장소별로 데이터베이스를 활용하여 손쉽게 검색하는 비디오 감시 시스템으로서 기존의 방법에 비해 더욱 효율적인 감시영상의 검색을 가능하게 한다.

• 한국멀티미디어학회논문지
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• 제16권1호
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• pp.50-55
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• 2013

This article presents a simple and reasonable in-service, real-time, and continuous single-ended objective video quality assessment model for DTV broadcasting using a multiburst signal at the bottom of the transient effect area, similar to Vertical Interval Test Signals. The issue of in-service video-quality monitoring in DTV broadcasting is addressed, and an effective method of quality monitoring is presented. The proposed method is also implemented and tested in a range of situations using a simulated HDTV broadcasting network.