• 치과방사선
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• 제29권2호
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• pp.387-396
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• 1999

In dentistry. RadioVisioGraphy was introduced as a first electronic dental x-ray imaging modality in 1989. Thereafter. many types of direct digital radiographic system have been produced in the last decade. They are based either on charge-coupled device(CCD) or on storage phosphor technology. In addition. new types of digital radiographic system using amorphous selenium. image intensifier etc. are under development. Advantages of digital radiographic system are elimination of chemical processing, reduction in radiation dose. image processing, computer storage. electronic transfer of images and so on. Image processing includes image enhancement. image reconstruction. digital subtraction, etc. Especially digital subtraction and reconstruction can be applied in many aspects of clinical practice and research. Electronic transfer of images enables filmless dental hospital and teleradiology/teledentistry system. Since the first image management and communications system(IMACS) for dentomaxillofacial radiology was reported in 1992. IMACS in dental hospital has been increasing. Meanwhile. researches about computer-assisted diagnosis, such as structural analysis of bone trabecular patterns of mandible. feature extraction, automated identification of normal landmarks on cephalometric radiograph and automated image analysis for caries or periodontitis. have been performed actively in the last decade. Further developments in digital radiographic imaging modalities. image transmission system. imaging processing and automated analysis software will change the traditional clinical dental practice in the 21st century.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2004년도 춘계학술발표회논문집
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• pp.203-208
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• 2004

Recently, digital image is increasing greatly practical use degree in several industry fields including construction. And interest about 3D digital image that can express practical object realistically is augmented greatly. In this study, developed 3D digital image generation system based on digital photogrammetry and created 3D digital image for object. And, wished to verify of 3D digital image through comparative analysis with processing result by digital photogrammetry system been using much the latest for acquisition of 3D information. Also, wished to apply to surface information acquisition about rock slope and execute investigation about discontinuity of joint etc. As the result, could created 3D digital image for object using the 3D digital image generation system developing in this study, and acquire surface information about rock slope efficiently.

• 전기학회논문지P
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• 제56권1호
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• pp.19-22
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• 2007

We developed a low cost digital X-Ray image capturing system using a CCD camera, instead of using the high cost image plate and image intensifier. In order to reduce the system volume, we directly made the dark box shorter than the previous model. Using the graphic language, we developed a program in order for post-processing the images captured by the CCD camera. This program improves the image resolving power.

• 대한공간정보학회지
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• 제5권2호
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• pp.207-220
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• 1997

본 연구에서는 항공사진과 지형공간정보체계를 이용하여 수치영상지도를 제작하기 위한 효율적 방안을 고찰하고, 저가의 개인용 컴퓨터시스템을 기본으로 하는 지형공간정보체계를 이용하여 수치항공사진 영상과 수치지형도를 중첩함으로써, 지형판독성과 활용성이 높은 수치영상지도를 제작하는 실험적 방안을 연구한다. 이를 위하여 지상좌표의 결정, 수치영상처리, 수치표고모형의 생성에 대하여 고찰한 다음, 수치영상지도제작에 필요한 영상자료 입출력, 수치편위미분수정, 항공사진을 이용한 정사투영상의 생성에 관련된 방법을 고찰하고, 수치영상지도를 실험제작하여 그 활용방안을 제시하였다.

• 제어로봇시스템학회논문지
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• 제13권12호
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• pp.1160-1166
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• 2007

This paper presents the design and implementation of an embedded image stabilization control system for a mobile phone with a built-in camera. Image stabilization is a family of techniques for reducing image blur resulting from minute camera shake due to hand-held shooting, thereby allowing the use of shutter speeds slower than values normally required to obtain sharp images. A mechanical image stabilizer mechanism developed for a camera mobile phone is introduced and a digital control system as a part of the image stabilization system is designed and implemented on an 8-bit microcontroller with integer arithmetic in C. This paper focuses primarily on issues that need to be taken into consideration for fixed-point implementation of the digital controller. Several experimental results are presented to demonstrate the performance of the implemented image stabilization control system.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2007년도 춘계학술대회
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• pp.35-39
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• 2007

We applied digital image processing about BitMap file structure in this research and studied about digital communication system. digital record saving devices can express 'High' and 'Low' as all data. Only, digital technique that two expression methods is used into several expenditures. People and communication that are far away by development of digital technology, became smooth. We wished to make communication system taking advantage of digi-tech. This system was made for communication with disabled and normal person specially. To communication method that we are studied such BitMap file handling image communication system. The goal of this contribution is to present the overview of basic algorithms for image processing using BitMap.

• 대한방사선치료학회지
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• 제16권2호
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• pp.25-32
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• 2004

목적 : 모의 치료실에서 환자의 정확한 치료 범위 결정을 위해 이용되는 투시영상은 일부 최신의 고가장비에서는 digital로 capture가 가능하나, 일반적인 simulator에서는 analog영상으로 capture를 할 수 없으며 모니터링만 할 뿐이다. 이번 논제에서는 conventional simulator를 이용한 저가의 Digital image capture system의 구현 방식을 소개하고, capture된 digital 영상을 이용한 임상적인. 실용 증례를 소개하고자 한다. 대상 및 방법 : 본원의 conventional simulator(SIMVIEW NT)용 모니터의 비디오 단자(terminal)에 video signal cable을 연결하여 A/D converter에 연결한다. converter jack을 컴퓨터 capture boar에 연결하고 컴퓨터상의 image capture system을 작동시켜서 원하는 image를 capture하거나 동영상을 녹화한다. Esophagus, cervix, breast 환자 등의 capture image를 상용화된 image processing program을 통해 임상적으로 활용한다. 결과 : 경제적으로 저렴하고 용이한 방법으로 Digital image capture system(DICS)의 구축이 가능하였으며 capture된 영상을 이용하여 simulation시에는 보다 정확한 환자 정보와 치료범위를 결정하는데 도움이 되었고, capture된 영상은 data로써 충분한 가치가 있었다. 결론 : 고가의 상용화된 장비를 구입하기 어려운 경우에 이와 같은 방법으로 저가의 system를 구축하게 되면 경제적 효과와 더불어 고가장비와 동등한 영상의 획득 할 수 있으며, 그러한 과정을 통해 얻어진 영상을 이용하여 다른 software program과 연계한다면 더 많은 임상적인 연구를 할 수 있을 것이라 생각된다.

• 한국멀티미디어학회논문지
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• 제20권11호
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• pp.1741-1749
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• 2017

In commercial digital-cameras, color-filter filters light according to wavelength range of color filter array (CFA) and the filtered intensities contain color information of light. Then, output data of CFA is transformed to final rendered image through demosaicing process. In image processing of digital-camera, the quality of the final rendered image is affected by optical cross talk of CFA, kind of CFA pattern etc. Basically, pattern of CFA plays important role in image quality of final image rendered by digital-camera. Therefore, an evaluation system capable of quantitatively evaluating CFA is needed. This paper proposes a novel evaluation system using existing and proposed image metrics for evaluating CFAs of digital-camera. Proposed CFA evaluation system consist of color difference in CIELAB and S-CIELAB, Structure SImilarity (SSIM), MTF50, moire starting point (MSP), and subjective preference (SP). MSP and SP are newly designed for the proposed evaluation system. Proposed evaluation system is expressed in polar coordinates to analyze the characteristics of CFA objectively and intuitively. Through simulations, we confirmed that proposed CFA evaluation system can objectively assess performance of developed CFAs.

• 한국측량학회지
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• 제22권3호
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• pp.233-244
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• 2004

최근 건설 분야를 비롯한 여러 산업분야에서 대상물에 대한 사실적인 표현이 가능한 3차원 수치영상에 대한 관심이 크게 증가하고 있다. 본 연구에서는 수치사진측량기법을 기반으로 3차원 수치영상 생성시스템을 개발하고 이를 이용하여 대상물에 대한 3차원 수치영상을 시범적으로 생성하였다. 그리고 3차원 수치정보의 획득을 위해 최근에 많이 활용되는 수치사진측량시스템에 의한 처리결과와 비교 분석을 통해 3차원 수치영상의 활용 가능성을 도출하고자 하였다. 또한 3차원 수치영상의 적용가능성을 점검하기 위해 암반사면의 불연속면 조사에 적용하였다. 연구결과, 본 연구에서 개발한 3차원 수치영상생성 시스템을 이용하여 대상물에 대한 3차원 수치영상을 효율적으로 생성할 수 있었으며, 암반사면에 대한 지표정보를 효과적으로 획득할 수 있었다.

• 반도체디스플레이기술학회지
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• 제19권3호
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• pp.12-18
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• 2020

In semiconductor manufacturing, defect detection is critical to maintain high yield. Currently, computer vision systems used in semiconductor photo lithography still have adopt to digital image processing algorithm, which often occur inspection faults due to sensitivity to external environment. Thus, we intend to handle this problem by means of using Mask R-CNN instead of digital image processing algorithm. Additionally, Mask R-CNN can be trained with image dataset pre-processed by means of the specific designed digital image filter to extract the enhanced feature map of Convolutional Neural Network (CNN). Our approach converged advantage of digital image processing and instance segmentation with deep learning yields more efficient semiconductor photo lithography inspection system than conventional system.