• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.3
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• pp.59-66
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• 2021

Humans mainly recognize surrounding objects using visual and auditory information among the five senses (sight, hearing, smell, touch, taste). Major research related to the latest object recognition mainly focuses on analysis using image sensor information. In this paper, after emitting various chirp audio signals into the observation space, collecting echoes through a 2-channel receiving sensor, converting them into spectral images, an object recognition experiment in 3D space was conducted using an image learning algorithm based on deep learning. Through this experiment, the experiment was conducted in a situation where there is noise and echo generated in a general indoor environment, not in the ideal condition of an anechoic room, and the object recognition through echo was able to estimate the position of the object with 83% accuracy. In addition, it was possible to obtain visual information through sound through learning of 3D sound by mapping the inference result to the observation space and the 3D sound spatial signal and outputting it as sound. This means that the use of various echo information along with image information is required for object recognition research, and it is thought that this technology can be used for augmented reality through 3D sound.

• Annual Conference of KIPS
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• 2010.04a
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• pp.475-477
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• 2010

본 논문에서는 객체 위주의 3D 파노라마를 생성하기 위하여 객체를 중심으로 영상을 촬영할 시, 조명의 위치나 방향에 의해 나타나는 영상 내 음영과 같은 휘도의 차이를 보정하는 방법을 제안한다. 제안하는 방법에서는 먼저 촬영한 영상을 그레이스케일 영상으로 변환한 후, 임계값(threshold)을 기반으로 객체 내 어두운 영역과 밝은 영역을 분류하고, 그레이스케일 영상의 히스토그램을 분석하여 분류한 영역의 차이를 완화시킬 수 있는 최적의 휘도 경계 값을 도출한다. 다음으로는 어두운 영역(shadow)과 밝은 영역(non-shadow)에 해당하는 히스토그램의 요소들을 추출하고, 추출한 요소들을 휘도 경계 값으로 이동하여 조명에 의해 발생된 영사의 휘도 차이를 보정한다. 제안한 방법을 건조물 문화재를 중심으로 촬영한 영상에 적용하였을 시, 조명에 의해 발생된 영상 내 급격한 휘도의 차이를 보정할 수 있었으며, 보정된 결과에서는 보정 전 어두운 영역에서는 관찰하기 어려웠던 건조물 문화재의 내부문양과 같은 정보들을 보다 명확히 확인할 수 있었다.

• Spatial Information Research
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• v.15 no.1
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• pp.35-52
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• 2007

Three-dimensional GIS, which provides spatial information through expression techniques of virtual reality close to the real world and the web, is one of the fields that attract a new attention. In particular, Open GIS Consortium(OGC) announced a topological relationship specification of spatial object which supports interoperability while interest in interoperability of spatial data is increasing. However, this specification is limited to two-dimensional spatial object. So this research established a topological relationship of three-dimensional spatial object in order to improve urban landscape and provide a foundation to use GIS. Based on this, this study proposes ways to visualize landscape information which is appropriate for new town's circumstances. It can be concluded that this research has a bigger meaning since it established a base of sharing information about realistic urban landscape that can be accessed regardless of place and time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.1
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• pp.119-126
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• 2015

In this paper, we propose a 3D visualization system that expresses the simulation results of port container operation monitoring and planning in terms of the movements of the surrounding environment including static and dynamic objects. It also enables us to objectively evaluate the operation model by way of animating the actual port operations. With XML-based design of object states, the port simulator visualization system (PSVS) that we propose has been implemented so as to maximize the interoperability with the existing port operation simulation (CATOS), and express the realtime animation of large-scale objects. The design method of PSVS system is explained, and its validity is experimentally examined.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.559-562
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• 2006

Existing 4D systems are using the 1:1 link system that directly links a schedule and a 3D model object. But considering that plant facility includes various kinds of schedule and 3D model object, this study suggests an improved link methodology of multi-selected objects and two-way link system for minimizing link errors which generated in case of multi-selected objects. For the link system, this study introduces a new concept called as interface board. Interface board can be used as an information center for representing all information of link items in the current project. It may be expected that 4D model can build an effective and rapid link system of plant project by this new approach.

• Proceedings of the KOR-KST Conference
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• 1999.10a
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• pp.477-482
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• 1999

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.561-563
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• 1998

객체지향기술의 주요 목표는 구조화된 소프트웨어를 생산하는 것과, 좀더 확장가능하고 재사용가능한 시스템을 구축하는데 있다. 본 논문은 재사용이 가능한 시스템 구축에 d있어 현재 활발히 연구되고 있는 객체지향 프로그래밍 분야 중 객체지향 프레임워크의 설계 지원도구에 대해 연구하였다. 객체지향 프레임워크는 분석과 설계 정보의 재사용을 포함하는 넓은 스케일의 재사용을 제공하는 재사용가능한 소프트웨어 아키텍쳐라고 할 수 있다. 이에 대한 설계 프로세스로 우선 3개의 어플리케이션에 대한 분석으로 객체를 추출하고, 객체에 대한 책임을 부여하며, 객체들간의 연결관계를 정의함으로써 이들에 대한 공통구조를 추출한다. 객체에 대한 책임을 부여하며, 객체들간의 연결관계를 정의함으로써 이들에 대한 공통구조를 추출한다. 여기에 영역 전문가로부터의 영역지식과 기존의 해결안인 디자인 패턴을 적용하여 프레임워크의 구조를 설계한다. 그리고 이런 설계 프로세스를 지원하기 위한 지원도구들이 필요한데 이들 설계 지원도구로는 공통구조를 모델링하기 위한 모델링 도구와 영역지식에 대한 관리도구, 디자인 패턴 지원도구가 포함된다.

• Journal of the Korea Society of Computer and Information
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• v.18 no.1
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• pp.21-29
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• 2013

The current software for creating and editing animation offers the possibility of dividing variable objects into layers. This paper suggests a method to render and edit each of right and left layer in the process of creating a 3D stereoscopic animation. It is possible to apply a variety of effects to left and right images and to adjust the gap of binocular parallax through this method so that wider variation of images and richer sense of depth can be produced. In addition, this method offers freedom of deleting and inserting an object, controlling size and position of the object and adjusting the gap of binocular parallax. Thus, new sense of depth can be obtained. This method shows the results to apply various effects on the 3D stereoscopic image and to reduce visual fatigue rather than the method to render simultaneously both of left and right layer.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.07a
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• pp.415-416
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• 2012

모델 기반 카메라 추적에서 추적을 위한 3 차원 객체 모델의 정확도는 매우 중요하다. 하지만 3 차원 객체의 실측 모델링은 일반적으로 정교한 작업을 요구할 뿐 아니라, 오차 없이 모델링 하기가 매우 어렵다. 반면에 오차를 포함하고 있는 객체 모델을 이용하더라도 실제 추적 환경에서 사용자가 느끼는 성공적인 추적의 허용 오차는 실제 추적 오차와 다를 수 있다. 따라서, 본 논문에서는 모델 기반 카메라 추적에서 모델링 오차에 따른 모델과 영상 정보 간의 실제 정합 오차와 육안으로 판단되는 정합의 허용 오차를 사용자 평가를 통해 비교 분석하고, 3 차원 객체 모델링의 허용 오차 범위에 대해 논의한다.

• Journal of Cadastre & Land InformatiX
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• v.46 no.1
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• pp.101-115
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• 2016

The uses of land were relatively simple in the old days, but they are being expanded rapidly to the aboveground and underground due to the urban concentration, the large-scale urban development and so on in these days. Accordingly, the concept of the rights to lands grows from 2D to 3D, and many studies about the 3D cadastral information have been performed in recent years. Several studies were performed about the construction and the visualization of the 3D cadastral information, but most of them focused on the 3D visualization of the buildings and facilities. However, it is more desirable to visualize the individual objects of the rights to lands while considering 'the information on the rights' as well as the 'physical information'. Therefore it is supposed to construct and use the 3D cadastral information based on the individual objects of the rights in this paper. The level of the cadastral information will be upgraded by making and describing more detailed 3D cadastral information through this paper. And also the applicability of the 3D cadastral information will be improved when it is used with the real estate information, the demographic information and many others.