• Journal of Broadcast Engineering
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• v.22 no.1
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• pp.42-50
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• 2017

A Bit-depth expansion is a method to increase the number of bit. It is getting important as the needs of HDR (High Dynamic Range) display or resolution of display have been increased because the level of luminance or expressiveness of color is proportional to the number of bit in the display. In this paper, we present effective bit-depth expansion algorithm for conventional standard 8 bit-depth content to display in high bit-depth device (10 bits). Proposed method shows better result comparing with recently developed methods in quantitative (PSNR) with low complexity. The proposed method shows 1db higher in PSNR measurement with 40 times faster in computational time.

• Science of Emotion and Sensibility
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• v.8 no.1
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• pp.63-74
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• 2005

This research basically defines that relationship among simplicity/complexity, other product aesthetics and consumer preference. The goal of this research is to find answer 'How much the simplicity/complexity influence expressed functional shapes on products?' and 'What is relationship between simplicity/complexity and consumer preference?' This is process that first we make categorize products by analysis, and second we analyze each category group for fading propensity from consumers, and finally we verify through design process.

• Journal of Educational Research in Mathematics
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• v.23 no.4
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• pp.491-503
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• 2013

In this paper we analyse how school mathematics terminologies have been changed from the syllabus period to the 2007 curriculum. For this we survey the school mathematics terminologies which have been used since the syllabus period on the 2007 curriculum basis, analyse changes in expression of those, and look through to the characteristics of mathematics terminologies for each curriculum period.

• Convergence Security Journal
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• v.14 no.5
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• pp.49-56
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• 2014

In this paper, we proposed a method for representing local facial features based on LDP (Local Directional Pattern). To represent both PFF (Permanent Facial Features) and TFF (Transient Facial Features) effectively, the proposed method configure local facial feature vectors based on overlapped blocks for each facial feature in the forms of various size and shape. There are three advantages - it take advantages of geometric feature based method; it shows robustness about detection error using movement characteristics of each facial feature; and it shows reduced sampling error because maintain spatial information caused by block size variability. Proposed method shows better classification accuracy and reduced amount of calculation than existing methods.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.4A
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• pp.325-328
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• 2011

In this paper, we present a new and simple derivation of the Craig representation for the two-dimensional (2-D) Gaussian Q-function in the viewpoint of geometry. The geometric derivation also leads to an alternative Craig form for the 2-D Gaussian Q-function. The derived Craig form is newly obtained from the geometry of two wedge-shaped regions generated by the rotation of Cartesian coordinates over two correlated Gaussian noises. The presented Craig form can play a important role in computing the probability represented by the 2-D Gaussian Q-function.

• Journal of KIISE:Software and Applications
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• v.32 no.6
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• pp.473-485
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• 2005

UML activity diagram is useful to model business process and workflow by reason of its suitability to present dynamic aspect of system. However it Is difficult to present precise semantics which is taken as important in workflow system with the guide provided by OMG to the UML activity diagram. This paper suggests workfolw system modelling methodology by applying ASM semantics to the activity diagram after extending its semantics to correspond to workflow system characteristics. Through the exact definition to formal semactics based on ASM it is possible to effectively model workflow.

• Journal of Digital Convergence
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• v.14 no.11
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• pp.489-494
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• 2016

Stop-Motion Animation is the work that gives lives to the objects. In order to give lives to objects and to form story line to persuade the audience, it is important that the reason of choice of color, material, and texture has something to do with the narratives. For this study, among the Garri Bardin's animation, the ones with good representation of the objects have been chosen: Conflict (1983), Fioritures (1987), and Adagio (2000). With these animations, I would like to look for the meaning of existence of the objects, and to consider the importance of the relationship between the types of objects that are represented and the narratives.

• Journal of the Korea Society of Computer and Information
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• v.15 no.3
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• pp.111-119
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• 2010

An artificial light source has a character that a light emits from a point to all directions with many radial and straight ray shapes. It is very difficult and complex to render those emitting lights. Also, users have difficulty in expressing exactly 3D objects because of colors varying with changing of a light and having many parameters. In this paper, to solve those problems we design an artificial light source using X3D to create a model that represents easily many radial and straight ray shapes and propose the online system that each factors of colors to be reflected by a light is separated and then users can control them to detect object's colors by a mouse. Various light sources with reality can be easily created using proposed system.

• The Journal of the Korea Contents Association
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• v.13 no.7
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• pp.91-101
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• 2013

At the age of uncertainty, the contemporary architecture has been changed by various design approaches as a result of the development of the media. Especially, being issued Phenomenology by Merleau-Ponty the tendency of visual interpretation on the architectural space has been studied positively. This research is to understand a Phenomenological approach to design the interior and architectural space. The phenomenological architectural space is based on knowing about the perception from a body and experience as a contents of the world. The touch from the space designed by Phenomenological architectural express by various way of the Phenomenological light is one of the concept of Phenomenological experience.

• The Journal of the Korea Contents Association
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• v.4 no.3
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• pp.81-90
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• 2004

Recently, It has been increased to use a multi-dimensional data in various applications with a rapid growth of the computing environment. In this paper, we propose the vector approximate tree for content-based retrieval of multi-dimensional data. The proposed index structure reduces the depth of tree by storing the many region information in a node because of representing region information using space partition based method and vector approximation method. Also it efficiently handles 'dimensionality curse' that causes a problem of multi-dimensional index structure by assigning the multi-dimensional data space to dynamic bit. And it provides the more correct regions by representing the child region information as the parent region information relatively. We show that our index structure outperforms the existing index structure by various experimental evaluations.