• Journal of the Korea Society of Computer and Information
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• v.22 no.1
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• pp.1-7
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• 2017

In this paper, we propose an efficient method that is tracking an object in real time using particle filter and adaptive observation model. When tracking object, it happens object shape variation by camera or object movement in variety environments. The traditional method has an error of tracking from these variation, because it has fixed observation model about the selected object by the user in the initial frame. In order to overcome these problems, we propose a method that updates the observation model by calculating the similarity between the used observation model and the eight-way of edge model from the current position. If the similarity is higher than the threshold value, tracking the object using updated observation model to reset observation model. On the contrary to this, the algorithm which consists of a process is to maintain the used observation model. Finally, this paper demonstrates the performance of the stable tracking through comparison with the traditional method by using a number of experimental data.

• Journal of the Korea Society of Computer and Information
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• v.17 no.10
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• pp.55-60
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• 2012

An free-fall object is received only force of gravity. Movement that only accept gravity is free-fall movement, and a free-falling object is free falling body. In other words, free falling body is only freely falling objects under the influence of gravity, regardless of the initial state of objects movement. In this paper, we assume, ignoring the resistance of the air, and the free-fall acceleration by the height does not change within the range of the short distance in the vertical direction. Under these assumptions, we can know about time and maximum height to reach the peak point from jumping vertically upward direction, time and speed of the car return to the starting position, and time and speed when the car fall to the ground. It can be measured by jumping degree and risk of accident from car or motorcycle in telematics.

• Journal of Korea Game Society
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• v.11 no.1
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• pp.93-100
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• 2011

Cinematic camera techniques are being increasingly applied to the game development these days. In this study, the object movement and camera effect for the game development using the curve in the 3D space were discussed. The Catmull-Rom spline algorithm follows the curve more closely than the other curve algorithms. With the algorithm proposed in this study, the Catmull-Rom spline was dynamically created according to the user's input in multiple sections in the 3D space, and objects smoothly passed along the route. In addition, Cut-Scene section is specified using the Catmull-Rom spline and the object movement can be observed. The results of the study on the accuracy and efficiency of the curve showed that the Catmull-Rom spline is very efficient not only for the object movement but also for the cinematic camera technique.

• Journal of the Korean Society of Costume
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• v.53 no.5
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• pp.141-153
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• 2003

The object of this study is to understand the problems of combat uniform garments through a survey regarding current wearing conditions, and furthermore to propose a combat uniform design more well suited to movement and body type. For this study, a survey of soldiers on active service was conducted. Based on the analysis of the survey results, a design that addressed the weak points of the garments currently in use was proposed. Four sets of experimental garments were created and in addition to present combat uniforms used in sensory tests to evaluate appearance and movement. In terms of the results of the evaluation of the appearance and movement evaluation. the test garments were generally received more favorably than the uniforms in current use.

• Journal of the Korea Furniture Society
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• v.24 no.3
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• pp.293-301
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• 2013

Through 1960 and 1970s, there had been constant endeavor in order to succeed the korean traditional architectural heritages. Among those efforts Ahn Yung Bae's book "Exterior Space in Traditional Korean Architecture"presented unique methodology utilizing abstraction of space and movement of subject. His method doesn't refer traditional form of architecture. He ignores formal elements. Instead, he reads space through subject's movement and this reading act creates meaning of space. So, he constructed knowledge not about the object of traditional architecture but the subject of today. Ahn's book opens new discourse based on traditional korean architecture. His analyses didn't deal with the form of traditional space, but the experiences of observer. However many historical documents related to architecture had not been interpreted until nineties and the succession of heritage became to be broken by modernity through 20th century. In this situation his book showed the unavoidable method, that is, the modernization of tradition.

• The KIPS Transactions:PartB
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• v.14B no.3 s.113
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• pp.171-182
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• 2007

We propose a simple method for tracking a nonparameterized subject contour in a single video stream with a moving camera and changing background. Then we present a method to eliminate the tracked contour object by replacing with the background scene we get from other frame. First we track the object using LOD (Level-of-Detail) canny edge maps, then we generate background of each image frame and replace the tracked object in a scene by a background image from other frame that is not occluded by the tracked object. Our tracking method is based on level-of-detail (LOD) modified Canny edge maps and graph-based routing operations on the LOD maps. We get more edge pixels along LOD hierarchy. Our accurate tracking is based on reducing effects from irrelevant edges by selecting the stronger edge pixels, thereby relying on the current frame edge pixel as much as possible. The first frame background scene is determined by camera motion, camera movement between two image frames, and other background scenes are computed from the previous background scenes. The computed background scenes are used to eliminate the tracked object from the scene. In order to remove the tracked object, we generate approximated background for the first frame. Background images for subsequent frames are based on the first frame background or previous frame images. This approach is based on computing camera motion. Our experimental results show that our method works nice for moderate camera movement with small object shape changes.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.393-395
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• 1998

This paper presents a modeling of railway facilities based on object-oriented software development technique for train operation simulation program. Railway network is decomposed by Line Structure Model and Signal System Model which can be composed to make the train routes and train performance calculation. A brief explanation of class design about these model is provided.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1929-1930
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• 2006

Human like robot arm posture for grasping by considering the shape of the target object is quite a challenge in the field of robotics. In this paper, an optimized grasp posture with respect to the shape of the object considering the wrist joint angle and elbow elevation angle, in order to verify that the grasp posture is human like has been proposed. Given a target object, the candidates for grasp are computed by the method described in this paper. For each candidate, the closed loop inverse kinematics has been solved for the corresponding hand position and orientation. From the obtained joint angles through inverse kinematics, the elbow elevation angle has been computed and compared with the elbow elevation angle obtained through human movement data by the characteristic equation. After considering all the candidates, the hand position and orientation with minimum wrist joint and difference in elbow elevation angles has been utilized as the optimized grasp posture. Simulation results are presented.

• Proceedings of the KSRS Conference
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• 2004.10a
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• pp.367-370
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• 2004

We model a moving object as a sizable physical entity equipped with GPS, wireless communication capability, and a computer such as a PDA and mobile phone. Furthermore, we have observed that a real trajectory of a moving object is the result of interactions among moving objects in the system yielding Multi-points instead of a line segment. In this paper, the new types and operations are integrated seamlessly into the moving object framework to achieve a relatively simple, consistent and powerful overall model and query language for constrained and unconstrained movement.

• Journal of the Korean Data and Information Science Society
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• v.18 no.4
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• pp.1157-1170
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• 2007

LBS must manage various context data and make the best use of this data for application service in ubiquitous environment. Conventional mobile object data management architecture did not consider process of context data. Therefore a new mobile data management framework is needed to process location context data. In this paper, we design a new context management framework for a location based application service. A suggestion framework is consisted of context collector, context manager, rule base, inference engine, and mobile object context database. It describes a form of rule base and a movement process of inference engine that are based on location based application scenario. It also presents an embodiment instance of interface which suggested framework is applied to location context interference of mobile object.