• Journal of Yeungnam Medical Science
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• v.15 no.2
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• pp.306-315
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• 1998

MR findings in nine patients(three female, six male) with neuro-Behcet's disease were retrospectively analyzed. NeuroBehcet's disease was diagnosed on the basis of typical clinical symptoms. Involved site, pattern, signal intensity, and contrast enhancement pattern on MRI were evaluated. In addition, follow up MR imaging was performed in four patients. The midbrain(7/9), internal capsule(7/9), pons(6/9), thalamus(6/9), basal ganglia (5/9), middle cerebella peduncle(4/9), medulla oblongata(2/9), and subcortical white matter(2/9) are involved on MRI. The size of lesions was 1cm to 3cm and their margin was ill-defined and patchy. Inhomogeneous high signal intensity on the T2-weighted images and low signal intensity on T1-weighted images was seen respectively. In four of nine cases, there was focal enhancement. On follow up MR imaging, improvement or recurrance of the lesions was found. Also in two cases of follow up cases, there was artophy in brainstem and(or) middle cerebellar peduncles. In conclusion, MR imaging with systemic clinical symptoms is useful for diagnosing neuro-Behcet's disease.

• Journal of Korea Multimedia Society
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• v.14 no.8
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• pp.1070-1081
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• 2011

Among visual communications methods through new media, the typography becomes a key role in information transfer areas with the development of motion graphics. Recently, the researches on stereoscopic image productions have been carried out actively to increase the reality of created images, and the various new approaches for the production of stereoscopic images have been investigated. However, it is obvious that the researches using motion typography have not been studied sufficiently. Thus in this study, the stereoscopic images for moving typography are suggested and produced by using three experimental studies -- the experiments using text movement, camera movement, and finally, editing and composition. In the experiments, from the stereoscopic motion typography produced by our proposed methods, the various visual effects have been obtained, and the visual communication with high reality has been achieved.

• Journal of Broadcast Engineering
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• v.13 no.5
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• pp.662-676
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• 2008

This paper presents a video copy detection algorithm that blocks online transfer of illegally copied DTV broadcast programs. Particularly, the proposed algorithm establishes a set of keyframes by detecting abrupt changes of luminance, and then exploits the spatio-temporal features of keyframes. Comparing with the preregistered features stored in the database of DTV broadcast programs, the proposed scheme performs a function of video filtering in order to distinguish whether an uploaded video is illegally copied or not. Note that we analyze only a set of keyframes instead of an entire video frame. Thus, it is highly efficient to identify illegal copied video when we deal with a vast size of broadcast programs. Also, we confirm that the proposed technique is robust to a variety of video edit-effects that are often applied by online video redistribution, such as apsect-ratio change, logo insertion, caption insertion, visual quality degradation, and resolution change (downscaling). In addition, we perform a benchmark test in which the proposed scheme outperforms previous techniques.

• Journal of Digital Convergence
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• v.18 no.8
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• pp.377-383
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• 2020

This paper studies the current development of personal media and the development of project mapping technology. The speed of social life is speeding up, and information dissemination tends to be fragmented. With the rapid development of mobile technology in recent years, personal media has gradually attracted the attention of people. And now image production and video editing become more and more simple in mobile devices, which provide a basis for the active personal media. The emergence of video content with high creative which is producing by projection mapping. And also providing an attractive new content for the general public. With the popularity of home projector, and the development of mobile terminal projection mapping production application. In the future, it will be possible to use projection mapping to produce personal media contents on the basis of mobile media platform.

• The Journal of the Convergence on Culture Technology
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• v.7 no.1
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• pp.588-594
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• 2021

Due to the recent proliferation of video contents, previous contents expressed as the character or the picture are being replaced to video and growth of video contents is being boosted because of emerging new platforms. As this accelerated growth has a great impact on the process of universalization of technology for ordinary people, video production and editing technologies that were classified as expert's areas can be easily accessed and used from ordinary people. Due to the development of these technologies, tasks like that recording and adjusting that depends on human's manual involvement could be automated through object tracking technology. Also, the process for situating the object in the center of the screen after finding the object to record could have been automated. Because the task of setting the object to be tracked is still remaining as human's responsibility, the delay or mistake can be made in the process of setting the object which has to be tracked through a human. Therefore, we propose a novel object tracking technique of CMT combining the face detection technique utilizing Haar cascade classifier. The proposed system can be applied to an effective and robust image tracking system for continuous object tracking on the smartphone in real time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.2
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• pp.234-239
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• 2021

Recently, as the installation of a large number of high-performance CCTVs for crime prevention and traffic control has increased rapidly, the problem of increasing system requirements for response to privacy infringement factors and analysis of high-definition image information transmitted from multiple cameras has been actively emerging. Accordingly, there is a need for a method for responding to privacy infringement and a method for efficiently processing surveillance images input from multiple cameras. In this paper, in order to reduce the processing cost of the input image and improve the processing speed, an integrated image is generated by grouping images input from a plurality of cameras. After analyzing the pre-generated integrated video, it detects a preset privacy event or an event that highlights interest. Depending on whether or not an event is detected, you will perform an editing operation corresponding to the event.

• Journal of the Korean Society of Radiology
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• v.83 no.4
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• pp.945-950
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• 2022

Anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis is a common autoimmune encephalitis that is noted to be a severe but treatable disease entity. Patients with anti-NMDAR encephalitis often develop psychotic symptoms, including delusions, hallucinations, and paranoia, as well as memory impairment and persistent loss of attention. However, MRI findings in such patients show no abnormalities in most cases. Although typical brain abnormality features, known as T2 hyperintensities, involve the brain parenchyma and contrast enhancement at the cerebral cortex or overlying meninges, isolated leptomeningeal enhancement has been rarely reported in anti-NMDAR encephalitis. Herein, we report a patient with anti-NMDAR encephalitis who presented with isolated leptomeningeal enhancement, additionally showing the diagnostic value of contrast-enhanced fluid-attenuated inversion recovery imaging.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.3
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• pp.35-41
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• 2018

In this paper, we define a haptic rendering algorithm for a situation that has collision between static object and single object. We classified video scenes into four categories which can be easily seen in video sequence. The proposed algorithm can detect which frame is suitable for haptic rendering by detecting the change of direction using motion estimation and change of shape using object tracking. As a result, a total of 13 frames are extracted from the sample video and playing time of these frames were calculated. We confirmed that the haptic effect appears in expected playing time by adding the appropriate haptic generating waveform thtough the haptic editing program.

• Journal of Broadcast Engineering
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• v.24 no.6
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• pp.939-947
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• 2019

With the revitalization of the media market, the necessity of compression, searching, editing and copyright protection of videos is increasing. In this paper, we propose a method to detect scene change in all these fields. We propose a pre-processing, feature point extraction using SIFT, and matching algorithm for detecting the same scene change even if distortions such as resolution change, subtitle insertion, compression, and flip are added in the distribution process. Also, it is applied to filtering technology and it is confirmed that it is effective for all transformations other than considering transform.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.356-358
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• 2012

본 논문에서는 OpenCV를 이용한 영상처리 작업환경에서 영상처리 결과에 따라 마커를 기반으로 한 복잡한 형태의 3D 애니메이션 객체를 띄우기 위해 사용되는 증강현실 라이브러리(ARToolkit, OpenVRML)를 함께 사용하는 시스템을 제시하였다. OpenCV 라이브러리와 증강현실 라이브러리는 카메라로부터 이미지를 얻어오기 위한 함수 및 가져온 이미지 타입이 다르고 각각의 라이브러리에 맞게 이미지를 처리하기 위한 설정 및 최종적으로 디스플레이 하기 위한 일련의 과정에 있어서 호출되는 모듈들이 상이하였다. 또한 ARToolkit내에서도 보다 복잡한 3D객체의 렌더링을 수월하게 하기 위한 OpenVRML 기반 렌더링과 개발자가 원하는 렌더링을 손쉽게 수행할 수 있는 OpenGL 기반 렌더링과의 병렬적인 연동에 있어서 두 라이브러리를 사용하는 프로젝트의 카메라 및 렌더링 설정과 렌더링 처리 절차에 차이가 있어 두 프로젝트의 기능별 모듈을 하나로 통합하였다. 그리고 영상처리 라이브러리의 이미지 처리에 대한 모듈을 전체 시스템의 처리 순서에 맞게 알맞은 함수들로 배정하여 이 함수 내에서 추후 개발자가 개발한 시스템에 맞게 직접 편집하여 활용할 수 있도록 하였다.