• 제목/요약/키워드: Digitize

검색결과 100건 처리시간 0.027초

C.C.D Camera를 이용한 RHEED Intensity Oscillation 측정

  • 김재훈;민항기;김재성
    • 한국진공학회:학술대회논문집
    • /
    • 한국진공학회 1994년도 제6회 학술발표회 논문개요집
    • /
    • pp.122-123
    • /
    • 1994
  • RHEED ppattern을 C.C.D Camera를 이용하여 관측한 후 C.C.D outpput signal을 Frame Garbber를 이용하여 Digitize하였다. Digitize된 RHEED ppattern의 정보로부터 원하는 Sppot의 intensity를 Image pprocessing Software를 개발하여 측정할 수 있다. [그림 1] 특히 thin film growth를 monitor하기 위하여 RHEED diffraction Sppot의 Intensity oscillation을 측정할 경우 실시간 측정이 필요하며 이를 위해 매우 빠른 속도의 data aquisition과 dispplay를 필요로 한다. 그림2는 이런 조건을 만족하는 software를 개발하여 실시간으로 측정한 AlGaAs/GaAs. multilayer RHEED Oscillation을 보여주고 있다. 이 실험은 매우 간단하고, 특별한 주의를 요하지 않으며, 측정되는 RHEED Sppot을 눈으로 동시에 관찰할 수 있어 실험 상황을 좀더 쉽게 monitor할 수 있게 해준다. 또한 data-aquitition. data-analysis, data-dispplay를 한 대의 compputer를 이용해 손쉽고 값싸게 할 수 있으므로, opptical fiber와 pphoto-diode, X-Y recorder등을 동원한 기존의 번잡한 실험을 대체할 수 있을 것이다.

  • PDF

점 데이타의 Rational B-spline 근사를 통한 역공학 (Rational B-spline Approximation of Point Data For Reverse Engineering)

  • 이현직;고태조;김희술
    • 한국정밀공학회지
    • /
    • 제16권5호통권98호
    • /
    • pp.160-168
    • /
    • 1999
  • This paper describes one method of reverse engineering that machines a free form shape without descriptive model. A portable five-axes 3D CMM was used to digitize point data from physical model. After approximation by rational B-spline curve from digitized point data of a geometric shape, a surface was constructed by the skinning method of the cross-sectional design technique. Since a surface patch was segmented by fifteen part, surface merging was also implemented to assure the surface boundary continuity. Finally, composite surface was transferred to commercial CAD/CAM system through IFES translation in order to machine the modeled geometric shape.

  • PDF

의류학 전공학생의 어패럴 패턴 CAD에 대한 인지도 및 교육효과에 관한 조사연구 (Investigation on the Education Effect and Recognition of Apparel Pattern CAD System on the Apparel Majority Student)

  • 최미성;조훈정;안혜자
    • 한국가정과학회지
    • /
    • 제7권1호
    • /
    • pp.1-10
    • /
    • 2004
  • The purpose of this study is to observe the teaching method and cognition process in using the PAD, Lectra and Investronica pattern CAD system. It is necessary to gather information about apparel pattern CAD to enable clothing and textile educators to efficiently incorporate CAD into their curricula and to provide more substantial information. Interviews and questionnaires were used in the research and twenty four questionnaires were used for data analysis. The results of this study are as follows: 1) Students thought that new technology such as apparel pattern CAD is important in the apparel industry, and they have a positive vision toward such innovation. 2) Student who study harder during in CAD class worked easily of all PAD, Investronica and Lectra system. 3) The most preferred teaching method is to small group instruction by the instructor and then having feedback from the instructor. 4) Students realized that they needed to take prerequisites subjects like clothing construction. 5) The most interesting step is the pattern grading system and the least interesting but easiest step is digitize for patterns in the Investronica system.

  • PDF

히스 노이즈제거를 통한 아날로그의 디지털 복원에 대한 연구 - X-NOISE를 활용한 히스 노이즈리덕션을 중심으로 - (A Research on the Digital Restoration of the Analog by Removing Hiss Noise (Using X-NOISE Based on Hiss-Noise Reduction))

  • 변정민;두일철
    • 디지털산업정보학회논문지
    • /
    • 제10권4호
    • /
    • pp.161-170
    • /
    • 2014
  • Analog cassette tapes are easily changed due to environmental factors. To digitize is the best way to preserve a sound source. The way to digitize is to deal with the original sound to be enhanced to a variety of sources by playing through the audio card after recording. In this process to occur, it's the most important to remove various noise and equalizing sound in a method for preserving. It's studied about how to remove noise by using one of softwares, Cubase 5. 5, to remove hiss noise, which happens changing analog tape into digitalization. A amount of hiss noise is reduced to use X-Noise software of Wave which uses in Cubase 5.0, one of PLUG-IN. The noise is removed changing value of threshold and reduction every 10 times in no change of origin sound. To keep regular condition, the experiment to remove the hiss noise is conducted based on sound meondle, which is one of sound Nonmaegi. The noise is removed easily when the value of threshold is getting high in spite of giving a little value of reduction. However, as it gives a amount of reduction high, the damage rate of the sound source gets high.

사진건판-CCD 화상변환장치. : II. 타원은하의 표면측광 (PLATE-TO-CCD CONVERTOR. : II. SURFACE PHOTOMETRY OF EARLY TYPET GALAXIES)

  • 김동우
    • 천문학논총
    • /
    • 제10권1호
    • /
    • pp.31-55
    • /
    • 1995
  • We have developed a new device, Plate-to-CCD Convertor (PCC), to conveniently digitize photographic plates in a relatively short time without losing any plate information (Oh et al. 1995). Using this device we have performed surface photometry of 12 early type galaxies. We determined relative orientations and scales to analyze PCC images. We also determined an ellipticity, position angle of the major axis, and $a_4$ of each galaxy to quantify the distribution of surface brightness. We checked the performance and limitation of this device by comparing the PCC images with those digitized by the ST microdensitometer and those obtained with CCD observations.

  • PDF

초정밀 고조파 측정을 위한 디지털멀티미터기의 사용 (Use of DMMs for High Precision Harmonics Measurements)

  • 위제;박영태
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2008년도 제39회 하계학술대회
    • /
    • pp.677-678
    • /
    • 2008
  • In this study, the method for the measurement of harmonics at nonsinusodial signal, which utilizes two synchronized high precision digital multimeters has been developed. The harmonics of voltage and current waveforms were computed from the acquired digitize samples through the DMMs and using developed software which based on FFT algorithm. The system can be used as a reference system to calibrate harmonic analyzers.

  • PDF

지적세부측량을 위한 위성영상의 활용 (Utilization of Satellite Image for Cadastral Surveying)

  • 이종출;차성렬;김남식;강윤성
    • 한국측량학회:학술대회논문집
    • /
    • 한국측량학회 2004년도 추계학술발표회 논문집
    • /
    • pp.535-538
    • /
    • 2004
  • Recently, Ministry of Government Administration and Home Affairs and Local Governments drafted plan to digitize cadastral maps for making effective land management and development. Cadastral map have difference in comparison with actual area's boundary since they used long time and continuously. In this study, verification of accuracy has concerned in comparison with cadastral map and IKONOS satellite image which has geometrical correction.

  • PDF

신경망 모델의 편향성을 줄이기 위한 데이터 증강 연구 (A Study of Mixed Augmentation for Reducing Model Bias)

  • 손재범
    • 한국정보처리학회:학술대회논문집
    • /
    • 한국정보처리학회 2020년도 춘계학술발표대회
    • /
    • pp.455-457
    • /
    • 2020
  • Recent studies demonstrate that deep learning model is easily biased by trained with unbalanced datasets. For example, the deep network can be trained to make a prediction by background feature instead the real target's feature. For those problem, a measurement called leakage was introduced to digitize this tendency. In this paper, we propose augmentation strategy which are used generally in computer vision problem to remedy this bias problem and we showed a simple augmentation methods have a effect to this task with experiments.

Requirements Engineering for Digitizing Traditional Medical Knowledge: The Case of Building Phytomedicine Mobile-Web Application in Tanzania

  • Beebwa, Irene Evarist;Dida, Mussa Ally;Chacha, Musa;Nyakundi, David Onchonga;Marwa, Janeth
    • International Journal of Knowledge Content Development & Technology
    • /
    • 제9권4호
    • /
    • pp.95-114
    • /
    • 2019
  • The digitization of traditional medical knowledge in Tanzania will greatly enhance its preservation and dissemination. This is especially important given the challenges facing the current methods of preserving and managing such knowledge. This study presents the requirements engineering approaches and requirements for a web-mobile application that would successfully digitize indigenous knowledge of phytomedicine and relevant practitioners licensing and registration processes. To establish the requirements of such a digital system application, the study sought the opinion of 224 stakeholders whose suggestions were used to analyze and model the requirements for designing such a web-mobile tool. The study was carried out in Arusha, Kagera and Dar es Salaam regions of Tanzania which involved ethnobotanical researchers, herb practitioners, curators from herbaria and registrar officers from Traditional and Alternatives Health Practice Council. Structured interview, survey, observation and document review were employed to find out the basic functional and non-functional requirements for possible designing and implementation a web-mobile application that would digitize indigenous knowledge of medicinal plants. The requirements were modelled using the use case and context diagrams. Finally, the study came up with a list of items for both functional and non-functional requirements that can be used as guidelines to develop a web-mobile application that will capture and document traditional medical knowledge of medicinal plants in Tanzania and, enabling relevant authorities to regulate and manage stakeholders.