Earticle

A Gimbal structure system in observation reconnaissance aircraft is made up of camera module and stabilization drive device supporting camera module. During flight for image recording, the aircraft undergoes serious accelerations with wide frequencies due to several factors. Though base excitation of stabilization drive device induces vibration of camera module, it must get the stable and clean images. To achieve this aim, acceleration of camera module must be reduced. Hence, vibration isolators were installed to stabilization drive device. Considering isolators and bearings in the stabilization drive device, vibration characteristics of gimbal structure system were analyzed by finite element method. For three translational direction, acceleration transmissibility of camera module was calculated by harmonic responses analysis in the frequency range of 5 ~ 500 Hz. In addition to, sine-sweep experiment were performed to prove correctness of present analysis.

본 논문에서는 현대 사회에서 증가하고 있는 다양한 범죄에 대비하기 위한 방법으로 웹캠 및 열화상 카메라 모듈을 통한 탐지·감시 시스템을 구현하였다. 본 논문에서는 웹캠을 통한 사람 탐지를 위해 얼굴의 각 부위별 나타나는 어둡고 밝은 부분의 특징을 이용한 검출 방법인 유사-하르 특징을 활용한 캐스케이드 기법과 대상으로부터 방사되는 적외선을 감지하여 정보를 표시하는 비접촉 방식으로 인체에서 방사하는 적외선을 감지하여 열화상을 표시하는 두가지 방안을 통합한 보간법을 활용하여 적용하였다. 이를 위해 SBC에 두 모듈을 탑재하여 구축하였으며, 이러한 보간법을 사용하면 향후 여러 정보 센서를 활용한 연동 방안을 사용시 인식 정보의 효율화를 높여줄 것으로 기대된다.

In this paper, we implemented a detection and surveillance system using webcam and thermal camera modules as a method to counter various crimes that are increasing in modern society. For human detection using a webcam, we applied a detection method called Haar-like features, which utilizes the characteristics of dark and bright areas in different parts of the face. We also integrated two approaches, one is a contactless method that detects the infrared radiation emitted from the subject and displays information, and the other is a method that detects infrared radiation emitted from the human body and displays thermal images using an interpolation technique. To accomplish this, we equipped Raspberry Pi with these two modules and built the system. It is expected that by using this interpolation technique, the efficiency of recognition information will be enhanced when integrating with various information sensors in the future.

Recently, aspheric glass lens molding core is fabricated with tungsten carbide(WC). If molding core is fabricated with silicon carbide(SiC), SiC coating process, which must be carried out before the Diamond-Like Carbon(DLC) coating can be eliminated and thus, manufacturing time and cost can be reduced. Diamond Like Carbon(DLC) is being researched in various fields because of its high hardness, high elasticity, high durability, and chemical stability and is used extensively in several industrial fields. Especially, the DLC coating of the molding core surface used in the fabrication of a glass lens is an important technical field, which affects the improvement of the demolding performance between the lens and molding core during the molding process and the molding core lifetime. Because SiC is a material of high hardness and high brittleness, it can crack or chip during grinding. It is, however, widely used in many fields because of its superior mechanical properties. In this paper, the grinding condition for silicon carbide(SiC) was developed under the grinding condition of tungsten carbide. A silicon carbide molding core was fabricated under this grinding condition. The measurement results of the SiC molding core were as follows: PV of 0.155 ${\mu}m$(apheric surface) and 0.094 ${\mu}m$(plane surface), Ra of 5.3 nm(aspheric surface) and 5.5 nm(plane surface).

Smartphone industry grew rapidly enough to draw a close attention in a short period less than ten years. Accordingly, required camera module industry is getting increase. In this study, it will be shown how to improve the productivity of new product model for the camera module before the growth to maximize the company profits.

In this paper, the key assembly of the recently developed light machine gun-Ⅱ sighting device was identified as prone to experiencing horizontal noise caused by unstable voltage fluctuations under high-temperature conditions during the defense environmental stress screening test. The primary objective ot this study is to address the issue of horizontal noise through circuit analysis and device parameter tuning, aiming to eliminate its presence.

최근 태양광 발전소 유지보수를 위해 태양광 모듈의 상태를 촬영하여 이미지 처리 분석하는 연구들이 진행되고 있 다. 이러한 연구들은 모듈영역의 온도 분포를 얻어서 열화상태를 진단하는 내용으로 정확한 태양광모듈 영역을 도출 하여야 하는 전제조건을 갖는다. 태양광 발전소의 열화 모듈 검색을 왜곡이 심한 카메라로 촬영할 경우 이미지 처리 과정이 복잡하고 분석의 난해성이 발생한다. 이를 해결하기 위한 카메라 행렬 도출이 필요하다. 본 논문에서는 카메 라 캘리브레이션이 이루어지지 않은 상태에서 얻어진 왜곡된 이미지를 보정하는 방법을 제안한다. 제안하는 방법은 태양광 모듈의 물리적 좌표를 도출, 모듈 가장자리의 이미지 좌표 도출, 도출된 값을 이용하여 캘리브레이션 수행을 통한 카메라 행렬 추출과 왜곡 보정 등으로 진행된다. 태양광 모듈의 물리적 좌표는 태양광 모듈의 직사각형 형태, 특정 모듈의 반복 배치, 등간격 설치 등의 특성을 이용하여 도출하고, 모듈 가장자리의 이미지 좌표값은 간단한 이 미지 처리와 수동 조작을 통해 획득하고, 도출된 값을 이용하여 캘리브레이션을 수행한다. 최종적으로, 왜곡된 이미 지를 보정이미지로 바꾸는 실험을 통해 제안한 카메라 행렬 추출과 이미지 보정 방법의 효과를 평가한다.

Recently, for the maintenance of a photovoltaic power plant, researches on photographing the state of a photovoltaic module and analyzing the image are being conducted. These studies have a prerequisite to derive an accurate photovoltaic module area with the contents of diagnosing the deterioration state by obtaining the temperature distribution of the module area. If the search for the deterioration module of a photovoltaic power plant is photographed with a camera with severe distortion, the image processing process is complicated and the analysis is difficult. To solve this problem, it is necessary to derive a camera matrix. In this paper, we propose a correction method for distorted images taken without camera calibration. The proposed method proceeds by deriving the physical coordinates of the photovoltaic module, deriving the image coordinates of the module edge, and extracting the camera matrix and correcting the distortion through calibration using the derived values. The physical coordinates of the photovoltaic module are derived using characteristics such as the rectangular shape of the photovoltaic module, repeated arrangement of specific modules, and equally spaced installation, and the image coordinate values of the module edges are obtained through simple image processing and manual operation, Calibration is performed using the derived values. Finally, the effect of the proposed camera matrix extraction and image correction method is evaluated through the experiment of changing the distorted image to the corrected image.

수면 중 발생되는 영유아의 높은 사망률 때문에 영유아 케어에 대한 중요성이 대두되고 있다. 본 연구에서는 블루투스 기술을 이용하여 스마트폰 으로 제어되는 Infant Care 디바이스의 초기 모델을 개발하였다. 개발된 모델은 MCU, 가속도 센서, 온도 측정 센서, 소리 센서, 블루투스 모듈, 카메라 모듈로 구성된다. 개발된 어플리케이션과 블루투 스 기술을 사용하여 측정된 유아의 낙상 감지 신호 정보, 울음 감지 신호 정보, 발열 감지 신호 정보를 부모의 스마트 폰과 컴퓨터 모니터를 통해 표출 하였다. Bluetooth Low Energy를 이용하여 저 전력 구동을 구현함으로서 구현된 Infant Care 시스템의 초기 설계모델의 유용성에 대해 확인 하였다.

This significance of the infant care system has emerged due to sudden infant death during sleeping .This paper presented a design and implementation of a prototype model, which is a infant care device controlled by a smartphone using Bluetooth technology. Prototype Device Model consists of MCU(microcontroller unit), Accelerometer Sensor, Temperature Measuring Sensor, Sound Measuring Sensor, Bluetooth Module, and Camera Module. The proposed application transfers the information to the parent's smartphone and computers, such as infant’s falling, crying, and fever detection. A test verified the availability of a prototype infant care system model using Bluetooth Low Energy with operating the low power driving.

스마트 폰 어플의 급속한 개발과 보급으로 우리는 일상생활에서 많은 유용한 모바일 서비스를 이용하는 것 이 가능하게 되었으며, 특히 스마트 기기의 카메라 모듈을 이용한 QR 코드 응용과 같은 흥미로운 어플들이 지속적으 로 개발되고 있다. 우리는 스마트 기기의 카메라 모듈을 이용하여 촬영되는 피사체의 실물 크기를 측정하는 어플을 개발하는 과정에서 국내에 시판되는 안드로이드 기반 스마트 폰들의 기종이나 시스템 버전에 따라 촬영되는 피사체 의 이미지의 크기나 모양이 매우 상이하게 나타난다는 점을 알게 되었다. 본 논문에서는 스마트 기기들의 카메라 모 듈로 촬영할 때 스마트 폰 기종과 시스템 버전에 따라 나타나는 차이점들을 면밀히 알아보고, 스마트 폰 카메라로 촬 영한 결과 영상에서 피사체의 실물 크기에 영향을 미치는 카메라 모듈의 다양한 특징들을 비교 분석하여, 이를 바탕 으로 스마트 폰 카메라 모듈을 이용한 피사체 크기 계측 어플을 개발하는데 응용하고자 한다.

With the rapid development and diffusion of smart phone applications, mobile users are able to use various useful mobile services in humdrum life. Especially, interesting applications like QR code using camera module in a smart phone are developed continuously nowadays. We realized that the size and shape of shooting objects taken by a smart phone camera module are very different according to their types and versions of the android-based smart phone in the process of developing applications for measuring the shooting object using camera module of a smart phone. In this paper, we investigate the major differences among smart phone types and system versions when we take specific object with camera module of smart phones, analyze the various characteristics of camera modules that influencing the real size of the shooting object taken by a smart phone, and apply them to the development of the smart camruler application.

기존의 지문촬영 방법은 접사렌즈를 장착한 디지털 카메라에 적절한 필터와 법광원을 활용하 여 삼각대 등으로 고정한 후 주변의 상황에 따라 카메라를 세팅하는 방식이었다. 그러므로 사용 상 불 편함이 많았을 뿐 아니라, 양호한 결과를 얻기가 매우 어려웠다. 본 연구에서 저자들은 이러한 문제점 을 개선하고자 범죄현장에서 접사촬영 시 필요한 모든 요소를 통합하여 어떤 조건하에서도 최적의 조 건을 구현할 수 있도록 사진촬영이 가능한 접사 촬영용 복합광원 모듈 장비를 설계하고 효율성을 확인 하였다. 본 장비는 촬영에 필요한 기기를 원통형으로 제작하여 주변 빛에 영향을 받지 않도록 촬영 대 상물 주변을 암실화하고, 광원의 각도를 조절하여(0 ~ 90o) 측광 및 직광 등 다양한 각도로 광원의 조사 가 가능하며 4개의 LED를 사용하여 기기 내부에서 20여 가지의 혼합색을 구현할 수 있도록 하였다. 그리고 촬영된 지문현출 색상에 따라서 AFIS에 의한 평균(Ave.) 매칭 및 특징점수에 관한 개선비율(%) 은 기존 방법(A)보다 신규 개발된 방법(B)이 녹색(G)에서 매칭점수는 3%, 특징점 개수는 8%을 보였으 나 노란색(Y)에서 매칭점수는 22%, 특징점수는 약 40%을 각각 나타내었다. 이 같은 결과로부터 동일 한 목적의 기존장비와 성능을 비교한 결과, 현저하게 개선된 효율성을 확인하였다. 결론적으로 본 지문 촬영 접사용 복합광원 조절 신규모듈은 일선 과학수사관들의 지문처리 업무를 효율적으로 극대화할 수 있을 것이다.

The conventional close-up picture for fingerprints in case of existing method was a method of setting digital camera according to the shooting environment equipped macro lens with appropriate filter and forensic light source after fixing the digital camera with a tripod. Therefore, there were many inconveniences in use and very difficult to obtain good results. In this study, the authors are designed and ensure efficiency the compound light source module by equipped all elements for close up picture can provide optimal results under any conditions at the crime scenes. The developed module designed cylindrical to be unaffected by outside lighting source by make dark room around the subject. The adjustable angle (0 ~ 90o) function for irradiating in various angles and using 4 LEDs to realize 20 mixed-color inside the module. And the improvement ratio (%) of the average (Ave.) matching point and the number of minutiae using developed module showed better result than existing method by AFIS according to the colors of fingerprint development powder. In the green (G), the matching point was 3% and the number of minutiae was improved about 8%. But in the yellow (Y), the matching point was 22% and the number of minutiae was improved about 40%, respectively. From these results, the remarkably improved efficiencies were confirmed as compared the performance with existing device. In conclusion, the new developed module will be able to maximize the fingerprint processing tasks of the frontline forensic investigators.

This paper deals with the algorithm development that inspects defects such as Lens Focus, Black Defect, Dim Defect, Color Defect, White Balance, and Line Defect caused by the process of Compact Camera Module (CCM). These days the demand of CCM goes on increasing in various types like PDA, a cellular phone and PC camera every year. However, owing to the defect inspection of CCM by the semiskilled work the average inspection time of CCM takes about 40 to 50 seconds. As time goes by the efficiency takes a sudden turn for the worse because workers must inspect with seeing a monitor directly. In this paper, to solve these problems, we developed the imaging processing algorithm to inspect the defects in captured image of assembled CCM. The performances of the developed inspection system and its algorithm are tested on many samples. Experimental results reveal that the proposed system can focus the lens of CCM within 5s and we can recognize various types of defect of CCM modules with good accuracy and high speed.

This paper deals with the algorithm development that inspects defects such as Lens Focus, Focus check, Black Defect, Dark Defect, Dim Defect, Color Defect, and Line Defect, Angle Defect, IrisAgc Defect caused by the process of 2M Class Compact Camera Module (CCM). Domestic market was majorly comprised of VGA(0.3 million pixel) market. But in the middle of year 2004, camera phone with Mega Pixel has appeared, and it is estimated that the camera phone with Mega Pixel will take up to 28% of total phone sales if it is released in the end of year 2004. Since the inspection of finished products is done manually, it is major obstacle in production increment In this paper, to solve these problems, we developed the imaging processing algorithm to inspect the defects in captured image of assembled CCM. The performances of the developed inspection system and we can recognize various types of defect of CCM modules with good accuracy and high speed

모바일 장치에서 사용하는 카메라 모듈을 가지고 MBA2440 보드에서 WINDOWS CE 운영체제의 디바이스 드라이버를 통하여 카메라 장치로부터 동영상 데이터를 얻어 화면에 표시하고, 여기서 획득된 화면정보를 Nand Flash 메모리에 저장하는 내용을 다룬다. 테스트에 사용된 카메라 모듈은 PIXELPLUS사의 모바일용 초소형 VGA급 30만 화소 카메라로 카메라모듈과 MBA2440보드 사이에 하드웨어적인 부분이 정상 작동하는지 확인을 위하여 펌웨어 상에서 카메라의 동영상 화면을 캡쳐하는 프로그램을 만들고, 이를 FAT File System을 이용하여 Nand Flash에 Image 파일 형태로 저장할 수 있도록 한다.

최근 출시되는 고사양의 Hand-phone 적용되어진 Camera Module은 대부분 Auto Focusing기능이 탑재되어 있으며 Camera Module의 화소수가 높아지면서 좀 더 정밀하고 안정적인 AF구동제품이 소비자에 의해 요구되고 있다. 본 논문은 현재 출시되고 있는 Camera Module적용 VCM(Actuator)의 문제점인 Auto Focusing시 Lens 초점위치 및 Module 자세에 따른 해상도편차 발생으로 해상도 보증 및 안정된 Actuator 구동을 위해 개선된 구조의 Hybrid VCM을 제안한다.

The recently-released camera modules assembled into high-end handsets generally carry auto focusing function. The resolution size of the camera modules is getting higher, and customers demand more precise and stable auto focusing function. When auto focusing function is getting performed, the camera modules applied to VCM usually have the problems, which are an error of lens focusing position and resolution deviation according to the shift of one's position. For this reason, I propose Hybrid VCM that has an improved structure for a stable work of actuator and higher resolution level.

The mobile-phone which Camera was put on was released at the end of 2000 and dramatically puts up the deployment ratio because not only simple Camera but also a function that the photograph which I took is dispatched was added. It is the force that demand in this year presses 600,000,000 sale of a mobile-phone is estimated to be 960,000,000 of them in 2006, and to be able to include two errands with a support model after 3G. A person of entry to a camera-module appear much. In addition, the various kinds of products open markedly which a product comes to be known widely in the world, and the application range has opened widely, and considered QCDT come to be key issues for answer to market demand. By manufacturing industry, there is peculiar culture to each industry, camera-module is the composition the various industries. The construction of true Supply-chain becomes unavoidable to make a good product. I describe the point that the situation of each supply-chain and the direction for the future by the view point of module assembly maker.