• 한국HCI학회:학술대회논문집
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• 2006.02a
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• pp.792-799
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• 2006

회화적 렌더링의 궁극적 목적은 주어진 영상을 사람이 직접 그린듯한 회화적 느낌을 가미하는 것이다. 이러한 회화적 느낌을 표현하기 위한 중요한 요소에는 브러시의 그리는 방향과 다양한 브러시 사이즈, 그리고 캔버스 위에 브러시로 그려지는 위치 등이 있다. 본 논문에서는 브러시의 방향을 효과적으로 표현하기 위해 영상의 방향 보간을 먼저 하였다. 그리고 입력 영상과 캔버스의 최대 차이점에서 에지와의 거리를 고려하여 동적인 브러시의 사이즈를 표현 하였다. 그리고 그려진 주변의 일정 영역 안에서 다시 최대 차이점을 찾아나가는 방법으로 다음 브러시의 위치를 결정하였다. 이렇게 실제 회화를 그리는 과정을 따라감으로써 사실적인 회화적 렌더링의 결과를 얻을수 있었다.

• Journal of Korea Multimedia Society
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• v.9 no.8
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• pp.1045-1053
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• 2006

We introduce a new method of painterly rendering. Instead of using the gradient direction of the source image to generate a brush stroke, we extract regions that can be drawn in one stroke using MHN filtering followed by identification of connected components, and make a brush stroke from each, based on an approximation to the medial axis. This method results in realistic-looking brush strokes of varying width that have an irregular directions where necessary.

• Journal of Korea Multimedia Society
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• v.8 no.2
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• pp.164-173
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• 2005

Painterly rendering may bring various results through the parameters that determine the characteristics of brush strokes such as, color, orientation, size, and shape. In this paper, we propose the most adaptive brush stroke generation for source images, using reference data. Our algorithm used Colors formed by actual palette colors from artists. To create the palette, we have referred mostly to colors used in Van Gogh's works and determined the color of brush strokes by transferring it to the most similar one, through comparing colors used in source images and the palette colors. Also, In order to emulate a brush stroke with dynamic properties like Van Gogh styles we have applied a brush stroke orientation that surrounds the edges by referring to the edge orientation of source images. The sizes were determined depending on the different sizes of the objects from wide to narrow brushes. Finally, we applied spline curve shapes to simulate curves and swirls like Van Gogh styles. The brush strokes created in such method, were applied separately according to its segmented images, and composed after rendering.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.2
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• pp.36-43
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• 2004

In this paper, the frequency spectra from respective mechanical noise signals detected using ultrasonic wave and AE(Acoustic Emission) sensor were analysed to under spark generation between brush and commutator side with arbitrarily 15$^{\circ}$ rotation for brush from the DC motor in operation. Also, the frequency spectra from respective magnetizing noise signals detected using ultrasonic wave and AE sensor were analysed to under neutral point for brush from the DC motor in normal operation. And the analyses and comparison between the mechanical noise signal and magnetizing noise signal of ultrasonic wave with brush location change from the DC motor in operation. As the experimental results, tile mechanical noise signal of ultrasonic wave under spark generation between brush and commutator side with brush location change from the DC motor in operation were increased about 2.5∼3.0 times than magnetizing noise signal of ultrasonic wave form the DC motor in normal operation. Also, the main frequency band for mechanical noise signals of AE under spark generation between brush and commutator side with brush location change from the DC motor in operation, appeared about 1.3[MHz]∼l.5[MHz] by the fast fourier transform.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.108-109
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• 2014

본 논문에서는 배터리, 양방향 DC-DC 컨버터, 그리고 브러시레스 직류 전동기로 구성되는 마이크로 터빈 구동 시스템의 제어 방식에 대해 소개한다. 브러시레스 직류 전동기 구동용 인버터의 직류링크 전압이 가변되기 때문에 기존의 소신호 모델 기반으로는 양방향 DC-DC 컨버터의 과도 응답 제어 성능이 저하되는 문제점이 있다. 본 논문에서는 평균 모델을 이용하여 양방향 DC-DC 컨버터를 제어함으로써 과도 응답 제어 성능을 개선하였고, PAM 방식 제어를 이용하여 브러시레스 직류 전동기의 고속 센서리스 운전을 구현하였다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1761_1762
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• 2009

본 논문은 자동차 연료 펌프의 수명을 결정짓는 연료펌프용 DC모터의 브러시-정류자간의 전압, 전류 특성을 분석 하는 것이다. 기존의 DC모터 실험으로는 정류자와 브러시 표면상태 확인이 어렵고 코일 전류 파형 및 브러시-정류자간 전압 강압 파형이 측정 불가했다. 그리고 모터의 L값을 변화 시킬 수 없기 때문에 다양한 조건의 실험이 불가 하였다. 이러한 단점을 보완하여 브러시-정류자간 전압 파형을 측정을 하기 위해 시뮬레이터를 개발하는 것이 본 논문의 주제이다.

• Journal of Korea Multimedia Society
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• v.10 no.2
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• pp.187-199
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• 2007

The purpose of painterly rendering is to express real painting work from input image. For expression of real pain ting impression, drawing condition is one of main element. In this paper, we propose new algorithm for using density of edges. Drawing condition of new algorithm uses color difference and density of edges. And for finding next position from current position, we used dynamic grid. We did direction interpolation for coherence direction. Also using various texture brush, we express the feel of a material effective. We show results of images rendered more realistic oil painting effect, and discuss long-term goals for more effective result.

• Journal of the Korean Applied Science and Technology
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• v.41 no.2
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• pp.338-348
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• 2024

Airbrushes are being utilized in various industries due to their practicality and ability to express a wide range of designs. Especially in the field of body painting, they have become an essential tool for artists. Airbrushes enable precise color application, shaping, and gradient expression, thereby reducing work time, which has led to their increasing use in the field of body painting. This study aims to present the latest design trends in airbrush body painting by analyzing the design composition, color planning, blending, and expression techniques, focusing on award-winning works in the airbrush-exclusive category of internationally recognized World Bodypainting Festivals. The results are as follows. Firstly, in terms of design composition, emphasis and balance principles are primarily used. The main image is emphasized at the center of the upper body, while a balanced composition with left-right symmetry is observed in the lower body. Secondly, color planning and blending primarily utilize contrasting colors to enhance visibility. Thirdly, all major award-winning works utilize stencil and gradient techniques to accurately depict shapes and add dimension. Based on these analyses, body painting designs were planned and executed using airbrushes. Through such artwork production, the artistic utilization of airbrush body painting is aimed to be popularized, contributing to domestic research in the field of airbrush body painting.

• Aerospace Engineering and Technology
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• v.4 no.1
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• pp.162-170
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• 2005

In KSLV-I, actuation system for thrust vector control of kick motor was configured as electro-hydraulic servo actuation system and consisted of actuators, hydraulic power supply system, hydraulic power distribution system and control system. In case of hydraulic power supply system, we use EMDP(Electric Motor Driven Pump) to supply hydraulic power. Generally, we use brushed DC motor for EMDP but it is not easy to operate EMDP using brushed DC motor at a high altitude. Hence, we are developing EMDP using brushless DC motor to use at a high altitude. In this study, we will explain control system for BLDC motor to drive hydraulic pump.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.694-696
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• 2003

본 논문은 회화적 렌더링(painterly rendering)을 위한 다양한 크기를 갖는 곡선 브러시 스트로크(brush stroke)의 생성에 관한 알고리즘과 그 구현 방법을 다루고 있다. 논문에서 제시하는 알고리즘은 한 장의 영상을 입력으로 하여. 화가가 손으로 그린 듯한 느낌을 주는 결과 영상을 만들어 낸다. 결과 영상은 브러시의 크기에 따라 몇 개의 계층(layer)으로 구성되며 각 계층들은 일련의 스플라인 커브(spline curve)로 모델링된 곡선 브러시 스트로크들로 이루어진다. 또한 결과 영상의 회화적 느낌을 강조하기 위하여 입력 영상의 색상을 변환하는 과정을 포함하고 있다.