• Title, Summary, Keyword: Camera Working

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Development of an Embedded Vision Platform for Internet-based Robot Control

  • Kim, Tae-Hee;Jeon, Jae-Wook
    • 제어로봇시스템학회:학술대회논문집
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    • pp.116.4-116
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    • 2002
  • $\textbullet$In case of using overhead camera system, mobile robot moves under static working area. $\textbullet$Mobile robot must use onboard camera system to work under wide working area. $\textbullet$Mobile robot must have wireless LAN to remove restriction of movement. $\textbullet$Onboard camera system must have wireless LAN environment. $\textbullet$We develop embedded vision platform using onboard camera.

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Design and evaluation of the thermal capability to secure a working time of cryogenic explosion-proof camera in LNG carrier tank

  • Kang, Geun-Il;Kwak, Si-Young;Park, Chun-Seong
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.9 no.5
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    • pp.568-576
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    • 2017
  • With an increase in the usage of LNG, there is a heightened interest about its safety aspects regarding the explosion of LNG carrier tank. The need for a cryogenic explosion-proof camera has increased. The camera has to work in cryogenic environment (below $-160^{\circ}C$) in LNG carrier. This study conducted design and heat transfer analysis of cryogenic camera to secure working time in limitation of heat source. The design with gap width of double pane windows was conducted based on simple vertical cavity model to insulate from cryogenic environment. The optimal gap width was 12.5 mm. For effective analysis considering convection within the camera, equivalent thermal conductivity method was adopted with ABAQUS. The working time of the camera predicted was over 10 h at warm-start condition. In cold-start condition, it required about 5 h of pre-warming time to work. The results of analysis were compared with the ones of the actual cryogenic test.

A Study on the Types of Camera Working of Projection Mapping Contents (프로젝션 매핑 콘텐츠의 카메라 움직임 유형에 관한 연구)

  • Song, Min Ji;Park, Jin Wan
    • The Journal of the Korea Contents Association
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    • v.14 no.8
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    • pp.1-12
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    • 2014
  • The projection mapping technique is used in various ways in almost every genre of performance arts at the moment. Thus, artist from various areas are participated in contents productions using it. The diversification of projection mapping contents gave producers a clue to try fresher visual effects and it was connected to the change of point of time using the camera working which was never used in old projection mapping contents productions. It is analyzed that the use of camera workings in the projection mapping image maximizes the visual Tactility and helps audiences concentrate on the contents. This study performed the theoretical research on the 'camera working' which is a new visual expression of the projection mapping and analyzed cases of projection mapping works applying them. It is to reconstruct the camera working which has been applied only by images of movies and suggest a guideline to create the optimized visual effect.

RECOGNIZING NEEDLE POSITION USING BOOK-ATTACHED CAMERA FOR SUPPORTING "WATOJI"

  • Kamon, Sayaka;Uranishi, Yuki;Sasaki, Hiroshi;Manabe, Yoshitsugu;Chihara, Kunihiro
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.760-763
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    • 2009
  • "Watoji" is a Japanese traditional book binding technique. An aim of this research develops a support system which everyone can make Watoji easily by. This system uses a working situation by recognizing a position of a needle and annotating to a book directly by mixed reality technique. Additionally, a technique of recognizing a working situation at a book is sewn by a needle is proposed. The proposed system of recognizing a position of a needle is build, then we experiment recognizing of a needle from an image. Furthermore, setting up Watoji on the system, we experiment recognizing of a position of a needle. An experimental result shows recognizing a needle from an acquired image from a camera. Using this result, a working situation can be recognized. Then, suitable information to a working situation can be presented.

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A Study on the Working Condition Effecting on the Maximum Working Temperature and Surface Roughness in Side Wall End Milling Using Design of Experiment (실험계획법을 이용한 엔드밀 가공 시 최대가공온도와 표면조도에 미치는 가공조건에 관한 연구)

  • Hong, Do-Kwan;Ahn, Chan-Woo;Baek, Hwang-Soon;Choi, Seok-Chang;Park, Il-Soo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.8 no.3
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    • pp.46-53
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    • 2009
  • To find the working condition is one of the important factors in precision machining. In this study, we analyzed maximum working temperature by infra-red camera and surface roughness in side wall end milling using design of experiment (DOE): RSM(response surface methodology), ANOM(analysis of means) and ANOVA(analysis of variance) by table of orthogonal array. ANOM and ANOVA are well adapted to select sensitivity of design variables for maximum working temperature and surface roughness. The effective design variables and their levels should be determined using ANOM, ANOVA. RSM is presented 2nd order approximation polynomial of maximum working temperature and surface roughness is composed with design variables. Therefore, it is expected that the proposed procedure using design of experiment : table of orthogonal array, ANOM, ANOVA and RSM can be easily utilized to solve the problem of working condition.

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A Study on Visual Servoing Application for Robot OLP Compensation (로봇 OLP 보상을 위한 시각 서보잉 응용에 관한 연구)

  • 김진대;신찬배;이재원
    • Journal of the Korean Society for Precision Engineering
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    • v.21 no.4
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    • pp.95-102
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    • 2004
  • It is necessary to improve the exactness and adaptation of the working environment in the intelligent robot system. The vision sensor have been studied for this reason fur a long time. However, it is very difficult to perform the camera and robot calibrations because the three dimensional reconstruction and many processes are required for the real usages. This paper suggests the image based visual servoing to solve the problem of old calibration technique and supports OLP(Off-Line-Programming) path compensation. Virtual camera can be modeled from the real factors and virtual images obtained from virtual camera gives more easy perception process. Also, Initial path generated from OLP could be compensated by the pixel level acquired from the real and virtual, respectively. Consequently, the proposed visually assisted OLP teaching remove the calibration and reconstruction process in real working space. With a virtual simulation, the better performance is observed and the robot path error is calibrated by the image differences.

Motion Plane Estimation for Real-Time Hand Motion Recognition (실시간 손동작 인식을 위한 동작 평면 추정)

  • Jeong, Seung-Dae;Jang, Kyung-Ho;Jung, Soon-Ki
    • The KIPS Transactions:PartB
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    • v.16B no.5
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    • pp.347-358
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    • 2009
  • In this thesis, we develop a vision based hand motion recognition system using a camera with two rotational motors. Existing systems were implemented using a range camera or multiple cameras and have a limited working area. In contrast, we use an uncalibrated camera and get more wide working area by pan-tilt motion. Given an image sequence provided by the pan-tilt camera, color and pattern information are integrated into a tracking system in order to find the 2D position and direction of the hand. With these pose information, we estimate 3D motion plane on which the gesture motion trajectory from approximately forms. The 3D trajectory of the moving finger tip is projected into the motion plane, so that the resolving power of the linear gesture patterns is enhanced. We have tested the proposed approach in terms of the accuracy of trace angle and the dimension of the working volume.

Analysis Study on Vibration Durability on Lens Manufacturing System of Camera (카메라의 렌즈 생산 시스템에 대한 진동 내구성에 관한 해석 연구)

  • Cho, Jae-Ung;Kim, Young-Choon;Joung, Woon-Se
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.5
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    • pp.2617-2622
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    • 2014
  • In this study, the critical frequency happened at system is analyzed when the motor of camera manufacturing system is working on the direction of Z axis. Configurations of modes at natural frequencies happened at two models are investigated by the study result through modal analysis. The range of natural frequency in this study system is from 100 Hz to 500 Hz. At this range, the maximum equivalent stress in case of 20 kg weight becomes 6.2335MPa and this stress is shown as 50 times more than in case of 10 kg weight. The working safety of system can be investigated through the analyses of natural frequency and harmonic response of this camera manufacturing system.

Control of an Underwater Stereo Camera Embedded in a Single Canister Capable of Measuring Distance (거리측정이 가능한 단동형 수중 스테레오 카메라의 제어)

  • 이판묵;전봉환;이종무
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • pp.90-95
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    • 2000
  • This paper presents the vergence control of a parallel stereo camera and its application to underwater stereo camera to enhance the working efficiency of underwater vehicles that equips with manipulators in seabed operation. The stereo camera consists of two parallel lenses mounted on a lateral moving base and two CCD cameras mounted on a longitudinal moving base, which is embedded in a small pressure canister for underwater application. Because the lateral shift is related to the backward shift with a nonlinear relation, only one control input is needed to control the vergence and focus of the camera with a special driving device. We can get a clear stereo vision with the camera for all the range of objects in air and in water, especially in short range objects. The control system of the camera is so simple that we are able to realize a small stereo camera system and to apply it to a stereo vision system for underwater vehicles. This paper also shows how to acquire the distance information of an underwater object with this stereo camera. Whenever we focus on an underwater object with the camera, we can obtain the three-dimensional images and the distance information in real-time.

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Control of an Underwater Stereo Camera Embedded in a Single Canister Capable of Measuring Distance (거리측정이 가능한 단동형 수중 스테레오 카메라의 제어)

  • 이판묵;전봉환;이종무
    • Journal of Ocean Engineering and Technology
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    • v.15 no.1
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    • pp.79-84
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    • 2001
  • This paper present the control of the image disparity of a parallel stereo camera and its application to an underwater stereo camera to enhance the working efficiency of underwater vehicles that are equiped with manipulators in seabed operation. The stereo camera consists of two parallel lenses mounted on a lateral moving base and two CCD cameras mounted on a longitudinal moving base, which is embedded in a small pressure canister for underwater application. Because the lateral shift is related to the backward shift with a nonlinear relation, only one control input is needed to control the vergence and focus of the camera with a special driving device. We can get clear stereo vision with the camera for all the range of objects in air and in water, especially in short range object. The control system of the camera is so simple that we are able to realize a small stereo camera system and apply it to a stereo vision system for underwater vehicles. This paper also shows how to acquire the distance information of an underwater object with this stereo camera. Whenever we focus on an underwater object with the camera, we can obtain three-dimensional images and distance information in real-time.

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