• Journal of Korea Game Society
• /
• v.14 no.2
• /
• pp.77-84
• /
• 2014

Presence of soft shadow effects from an area light makes virtual scenes look more realistic. However, since computation of soft shadow effects takes a long time, acceleration methods are required to apply it to real-time 3D applications. Many researches assumed that area lights are white rectangles. We suggest a new method which renders soft shadows under the area light source having arbitrary shape and color. In order to approximate visibility test, we use a shadow mapping result near a pixel. Complexity of shadow near a pixel is used to determine degree of precision of our visibility estimation. Finally, our method can present more realistic soft shadows for the area light that have more general shape and color in real-time.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.15 no.4
• /
• pp.43-50
• /
• 2001

In this paper, the discharge phenomena and electromagnetic waves caused by discharge with insertion of a solid insulator and flame between sphere-sphere electrodes in air ware investigated. The surface discharge light and patterns of flame generated on a solid insulator surface were observed by using a CCD(Charged Coupled Device) camera. Also, the radiated electromagnetic waves were measured by using a biconical antenna and a spectrum analyzer. The surface discharge light generated on the solid insulator surface was larger and the size of flame was smaller by increasing allied voltages. Also, voltage distortion by voltage drop was strongly revealed when a insulator surface was polluted. When a solid insulator surface was not polluted, the electric field stength of electromagnetic waves was 10∼17[dBuV/m] higher than a polluted solide insulator, and 5∼9[dBuV/m] higher than a polluted solide insulator and flame.

• Journal of the Korea Computer Graphics Society
• /
• v.21 no.3
• /
• pp.55-61
• /
• 2015

In this paper, we introduce a method to synthesize realistic make-up effects on input images efficiently. In particular, we focus on shading on the make-up effects due to the lighting and face curvature. By doing this, we can synthesize a wider range of effects realistically than the previous methods. To do this, the information about lighting information together with the normal vectors on all pixels over the face region in the input image. Since the previous methods that compute lighting information and normal vectors require relatively heavy computation cost, we introduce an approach to approximate lighting information using cascade pose regression process and normal vectors by transforming, rendering, and warping a standard 3D face model. The proposed method consumes much less computation time than the previous methods. In our experiment, we show the proposed approximation technique can produce naturally looking virtual make-up effects.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.22 no.9
• /
• pp.1214-1219
• /
• 2018

A variety of VR contents are being introduced as of 2017. VR contents are concentrated in the genre of games and interactive because of the difficulty of $360^{\circ}$ shooting production environment. Live action $360^{\circ}$ VR content has many problems due to the difficulty of the production environment. In this paper, a three - dimensional information value is generated in binocular disparity of a real image by using a re-light technique based on real image data. The generated 3D information values are combined with a technique of converting the depth information into a depth map and a re-light technique by installing virtual lighting on the surface formed in the 3D space. In order to solve the problem of lighting exposure, we apply the technique of re-lighting to the VR production pipeline by comparing and analyzing the result image of actual image and virtual image data.

• JOURNAL OF ELECTRICAL WORLD
• /
• no.10 s.106
• /
• pp.86-90
• /
• 1985

요즘 빌딩을 비롯하여 공장, 병원, 학교등 모든 분야의 건축시설에서 OA화, FA화, EA화등 정보화시대에 대응할 수 있도록 설비면에서의 배려가 중요과제로서 크로즈업되게 되었다. 주요과제를 들면 전원의 공급방식, 접지 등 거주환경, 조명 등 다방면에 걸치게 되는데 여기서는 빌딩을 예로 하여 OA 접지에 대하여 소개하기로 한다.

• Journal of the KSME
• /
• v.52 no.2
• /
• pp.39-42
• /
• 2012

이 글에서는 최근 급속하게 확산 적용되고 있는 고전력 LED 조명에서의 주요 요소기술인 광원냉각기술의 최근 동향을 소개하고, 국부적인 능동냉각으로 면 광원 분포의 성능을 용이하게 제어할 수 있는 자원절약형 친환경 액적열스위치에 대한 개념과 기술적인 관심사에 대해 소개하고자 한다.

• Proceedings of the Optical Society of Korea Conference
• /
• 2004.07a
• /
• pp.232-233
• /
• 2004

LED 광원의 특성인 높은 색재현성, 친환경성, 저소비전력 등을 디스플레이 광원으로 그 활용도가 높이 평가되고 있다. 최근 비약적인 광효율 증가를 보이고 있는 고출력 LED 광원을 대화면의 LCD TV 용 BLU 와 Projection TV의 조명계에 적용하기 위하여 기술개발에 필요한 주요 요소들을 살펴본다.

• 주택과사람들
• /
• s.206
• /
• pp.6-7
• /
• 2007

정부는 6월 1일 화성 동탄면 일대 660만 평을 분당급 신도시로 개발한다고 발표했다. 10만 5000가구에 26만 명을 수용할 계획이다. 구릉 많은 동쪽 지역은 타운하우스.고급단독.연립주택 단지가 들어설 예정이고, 평지 많은 서쪽 지역은 고층 아파트와 주상복합이 들어설 것으로 보인다. 신도시의 향후 개발계획을 집중 조명한다.

• The Optical Journal
• /
• s.129
• /
• pp.14-16
• /
• 2010

자동차 헤드램프용 비구면 렌즈를 비롯하여 첨단IT기종에 적용되는 다양한 특수 렌즈 및 부품을 전문생산하고 있는 아주광학(대표 최상관, www.ajuoptical.co.kr)은 신기술에 대한 끊임없는 도전의지와 국산화개발 노력을 통해 화려한 변신을 추구하는 업체이다. 내수와 수출을 50:50으로 균형 있게 갖고 가고 있으며 최근에는 독자적인 LED조명등을 개발하여 발명특허를 출원하고 계속해서 사업영역을 확대해 나가고 있다.

• Proceedings of the Optical Society of Korea Conference
• /
• 2008.07a
• /
• pp.315-316
• /
• 2008