Development of an Adaptive Lens Using an Ionic Polymer-metal Composite

신은재,박원형,여명,배진우,김상연 한국지식정보기술학회 2017 한국지식정보기술학회 논문지 Vol.12 No.4

The optical focus variable lenses have been widely used in consumer electronic devices to capture objects which are located in arbitrary position. These focus variable lenses are achieved by changing the distance between the two or more lenses or are made with electrowetting mechanism, liquid crystal material, or liquid with a pump. These lenses suffer from aberrations due to non-uniformities in the electric field and trouble with liquid evaporation. Another drawback of these focus variable lenses is to need an external mechanism (including actuators outside the optical path). In this paper, we present another type of lens using an electroactive polymer. The purpose of this paper is to describe self-deformable thin lens without any external mechanism. We fabricated an IPMC lens with blur-sharp effect. The IPMC lens is composed of both a thermally imprinted, transparent, and concave-structured Nafion membrane and partially electroless-plated the platinum electrode. By applying a low AC voltage to the IPMC lens, the IPMC deforms upward and downward for itself. As a result, the blur-sharp effect was obtained in the concave-structured Nafion membrane. The proposed method for fabricating blur-sharp effect lens has a large potential to realized very small electro-optics, especially in the field of consumer electronic devices.

워너필터를 이용한 표면결함의 초음파영상 개선

김 현,전계석 慶熙大學校 레이저 工學硏究所 1998 레이저공학 Vol.9 No.-

. The enhancement of ultrasonic images for a sample of the surface defects has been studied by using the Wiener filters with various window functions. It has been shown that the filter produces te low noise gain fo the components of high spatial frequency and provides a stable operation. In this experiment, the acoustic microscope has been constructed by using quadrature method. As a sample, a 10won coin has been used. In the result of this experiment, it has been found that the enhanced images have high quilty due the reduced blurring effect.

단일 영상에서 디포커스 맵을 활용한 보케 효과 알고리즘

이용환,김흥준,Lee, Yong-Hwan,Kim, Heung Jun 한국반도체디스플레이기술학회 2022 반도체디스플레이기술학회지 Vol.21 No.3

Bokeh effect is a stylistic technique that can produce blurring the background of photos. This paper implements to produce a bokeh effect with a single image by post processing. Generating depth map is a key process of bokeh effect, and depth map is an image that contains information relating to the distance of the surfaces of scene objects from a viewpoint. First, this work presents algorithms to determine the depth map from a single input image. Then, we obtain a sparse defocus map with gradient ratio from input image and blurred image. Defocus map is obtained by propagating threshold values from edges using matting Laplacian. Finally, we obtain the blurred image on foreground and background segmentation with bokeh effect achieved. With the experimental results, an efficient image processing method with bokeh effect applied using a single image is presented.

Image Blurring Estimation and Calibration with a Joint Transform Correlator

정만호 한국광학회 2014 Current Optics and Photonics Vol.18 No.5

The Joint Transform Correlator (JTC) has been the most suitable technique for real time optical pattern recognition and target tracking applications. This paper proposes a new application of the JTC system for an analysis of the blurring effect of the optical images caused by a defocused lens. We present the relation between the correlation peak, optical transfer function (OTF), and the amount of blurring caused by focusing error. Moreover, we show a possibility of calibrating the blurred image by simply measuring the correlation peak.

Aero-optical transmitting effect in the compressible mixing layer

Ma, Handong,Gan, Caijun,Li, Lang The Society for Aerospace System Engineering 2015 International Journal of Aerospace System Engineer Vol.2 No.2

The handicap for investigating the aero-optical effect focuses on the accurate prediction on the index refraction fluctuation or density fluctuation. In recent years, with the development of CFD techniques and optical experimental techniques, the comprehension have developed on the aero-optical transmitting effect in many kinds of complex flow. This study mainly introduces the optical aberration in compressible mixing layer. And then the debates about the mechanism of aero-optical effects and assessment of image blur also present.

아연결정유약을 이용한 도자문양의 번짐효과에 대한 연구

박경희(Park, Kyung Hee) 한국전시산업융합연구원 2015 한국과학예술융합학회 Vol.22 No.-

본 연구의 배경 및 목적은 다음과 같다. 현대도자예술 부분에 있어 도예작품을 장식하는데 금속산화물이 함유된 결정유약을 주로 사용하고, 기물의 전체에 시유하는 것이 일반적이다. 소성 후 기물의 표면에 자연스럽게 생성된 화려한 결정 형상 차체의 모습을 감상한다. 세라믹 핸드페인팅은 고화도 세라믹 물감으로 그림을 그리는 후 투명유약을 시유하는 실정이다. 본 연구는 핸드페인팅으로 그린 도자문양에 투명유약 대신 Frit 3110을 기본으로 한 아연결정유약을 사용하여, 수묵화의 발묵과 유사한 표현기법의 가능성을 모색하고자 한다. 본 연구의 목적은 아연결정유약이 핸드페인팅용 고화도 세라믹 물감과 반응하여 먹과 물의 농도에 의해 추상적으로 표현되는 발묵효과가 도자예술에서도 응용할 수 있는 새로운 표현기법을 도출하는 것이다. 본 연구의 방법 및 내용, 그 결과는 다음과 같다. 첫째, 핸드페인팅용 고화도 세라믹 물감으로 작업한도자문양에 사용될 아연결정유약의 출발 원료는 Frit 3110, ZnO, SiO₂, SiO₂, Li₂CO₃, TiO₂, Kaolin이다. 이 재료를 사용하여 3가지 기본결정유약을 실험하고 결과를 기술하였다. 둘째, 핸드페인팅용 고화도 세라믹 물감으로 초벌기물 위에 그려진 연화문(蓮花紋)과 물고기 그림을 중심으로 문양들이 상징하는 의미를 고찰했다. 셋째, 수묵화의 발묵은 물과 먹을 이용하여 자유롭게 추상성이 표현되는데, 도자문양에서도 아연결정유약의 결정체 형상에 의해 추상성이 표현되는지 연구하였다. 넷째, 핸드페인팅용 고화도 세라믹 물감으로 도자문양을 그린 후 3종류의 아연결정유약을 시유하고, 전기가마에서 1260℃ 까지 산화소성 하였다. 그 결과 본 연구에서 아연결정유약을 사용했을 경우 수묵화의 발묵과 유사한 추상표현이 가능하다는 것을 도출하였다. 결론적으로 핸드페인팅용 고화도 세라믹 물감으로 그린 도자문양에 아연결정유약의 결합이라는 시도로 동양화의 발묵효과가 도예에서는 번짐효과로의 새로운 표현기법을 제시하였다. 향후 다른 장르의 표현 기법을 도자예술에 융합하여 장식기법에 적극적으로 활용하고자 하는 실험정신이 있을 때 획기적인 변화와 발전이 가능하다. Background and objectives of this study are as follows. Modern ceramic parts used in the art mainly to the decision glazed decorative metal oxide containing a ceramic art work, and it is common to the whole of glazed vessels. And enjoy the spectacular view of the crystal form produced naturally in the body surface vessels after firing. This study used a zinc crystalline glaze with Frit 3110 as a base instead of transparent glaze in ceramic of a hand-painted patterns. And to explore the possibility of similar expressions, as pomo technique of ink painting. The purpose of this study was to zinc crystalline glazes react with the high temperature ceramic dyes for hand-painting would like to draw the new expression techniques that can be applied in ceramic art, as like pomo effect is represented abstractly by the concentration of ink and water. The research method is as follows. Firstly, the starting materials of the zinc crystalline glaze in ceramic patterns worked with the high temperature ceramic dyes for hand-painting are Frit 3110, ZnO, SiO₂, SiO₂, Li₂CO₃, TiO₂, Kaolin. Using this test the three basic crystalline glazing material, and the results were described. Secondly, the materials of ceramic patterns were chosen with fish and lotus patterns. To evaluate the significance of a symbol pattern with fish and lotus flower patterns. Thirdly, pomo of ink painting is freely abstraction is represented by water and ink, indeed even if the ceramic patterns were studied by crystal-shaped of zinc crystalline glaze abstraction it is represented. Fourth, ceramic patterns even after high temperature ceramic dyes for hand-painting were glazed three kinds of zinc crystalline glaze, and it was fired in an electric kiln to 1260℃ by oxidation. The results were derived abstract representation similar to that pomo of ink painting and this is possible by using zinc crystalline glaze. Finally, a new attempt of combining zinc crystalline glaze and ceramic patterns with high temperature ceramic dyes for hand-painting is shown for, that Pomo effects of oriental painting are presented in a new expression technique to blurring effect in ceramics. The future of ceramic art by fusing different genres of representation techniques can be developed when there are significant changes and experiment to be actively used as a decorative technique.

Is It a Goal-Oriented or Goal-Contagion Trend? Exploring Behind the Scene of Metaverse Technology Adoption and Platform Development

Soo Il Shin,Sumin Han 한국경영정보학회 2021 한국경영정보학회 학술대회논문집 Vol.2021 No.11

The goal of our research is to offer theoretical propositions to delve into the current phenomenon of an organization’s adoption or implementation of metaverse platforms or services. Our study attempted to employ the theoretical underpinnings of the goal contagion theory, dynamic capabilities, big blur effect, and the theory of organizational creativity. The current study suggests aspects of such theorybased organizational behaviors and tendencies which may affect the adoption or implementation willingness toward metaverse platforms and services. A theoretical research model and propositions are illustrated and discussed.

The Blurring Effect of the Image Made by Optical Characteristic

Byeong-Ho Jeon 한국콘텐츠학회 2011 ICCC International Digital Design Invitation Exhib Vol.2011 No.12

The Blurring Effect of the Image Made by Optical Characteristic

Byeong-Ho Jeon 한국콘텐츠학회 2011 한국콘텐츠학회 ICCC 논문집 Vol.- No.-

단안카메라 기반 삼차원 입체영상 증강현실

노승민(Seungmin Rho),이진우(Jinwoo Lee),황재인(Jae-In Hwang),김준호(Junho Kim) 한국컴퓨터그래픽스학회 2016 컴퓨터그래픽스학회논문지 Vol.22 No.3

본 논문은 모바일 기반 양안식 HMD 기기를 사용하는 마커기반의 증강현실시나리오에서 단안영상으로부터 삼차원 입체영상을 생성하는 효과적인 기법을 제안한다. 모바일 기기의 단안카메라로는 좌안과 우안에 대해 정확한 양안시차를 제공하는 양안영상을 생성할 수 없기 때문에, 기존의 양안식 증강현실 시스템에서는 좌안과 우안에 동일한 실세계 영상을 제공하여 입체감과몰입감이떨어지는문제점이있다.본논문에서는마커기반의증강현실시나리오에서대부분의사용자들이마커를 주시한다는 가정 하에, 기존 방법에 비해 높은 입체감과 시각적 편안함을 제공하는 단안카메라 기반 3차원 입체영상 생성기법을 제안한다. 마커와 카메라의 3차원 자세정보를 통해 단안영상을 3차원 공간상에 나타내고, 사용자의 좌안과 우안에 해당하는 가상의 두 카메라를 통해 단안영상의 마커영역과마커 위에 증강될 가상물체에 대해서 시차를 계산한다.마커 이외의 영역은 블러 효과를 적용하여 선명도를 낮추고 양안식 HMD를 통해 입체 콘텐츠를 감상할 때 발생하는 시각적인 피로를 감소시킨다.본논문에서제안하는 방법으로 생성된 3차원 입체영상이 기존 방법에 비해 높은 입체감을 제공하는지 여부를 세가지의 사용자 실험을 통해 평가하였다. 실험결과,본 논문에서 제안하는 방법이 기존방법에 비해 높은 입체감을 제공하고 시각적인 피로가 크지 않는다는 것, 사람의 시차와 동일한 스테레오 카메라를 통해 촬영된 영상과 유사한 현실감을 사용자에게 제공한다는 것, 그리고 영상블러를 통해 사용자의 시각적인 피로도가감소되었다는 사실을 확인하였다. This paper introduces an effective method for generating 3D stereoscopic images that gives immersive 3D experiences to viewers using mobile-based binocular HMDs. Most of previous AR systems with monocular cameras have a common limitation that the same real-world images are provided to the viewer’s eyes without parallax. In this paper, based on the assumption that viewers focus on the marker in the scenario of marker based AR, we recovery the binocular disparity about a camera image and a virtual object using the pose information of the marker. The basic idea is to generate the binocular disparity for real-world images and a virtual object, where the images are placed on the 2D plane in 3D defined by the pose information of the marker. For non-marker areas in the images, we apply blur effects to reduce the visual discomfort by decreasing their sharpness. Our user studies show that the proposed method for 3D stereoscopic image provides high depth feeling to viewers compared to the previous binocular AR systems. The results show that our system provides high depth feelings, high sense of reality, and visual comfort, compared to the previous binocular AR systems.