• Title, Summary, Keyword: Laser Pointer Tracking

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Context Driven Real-Time Laser Pointer Detection and Tracking (상황 기반의 실시간 레이저 포인터 검출과 추적)

  • Kang, Sung-Kwan;Chung, Kyung-Yong;Park, Yang-Jae;Lee, Jung-Hyun
    • Journal of Digital Convergence
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    • v.10 no.2
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    • pp.211-216
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    • 2012
  • There are two kinks of processes could detect the laser pointer. One is the process which detects the location of the pointer. the other one is a possibility of dividing with the process which converts the coordinate of the laser pointer which is input in coordinate of the monitor. The previous Mean-Shift algorithm is not appropriately for real-time video image to calculate many quantity. In this paper, we proposed the context driven real-time laser pointer detection and tracking. The proposed method is a possibility of getting the result which is fixed from the situation which the background and the background which are complicated dynamically move. In the actual environment, we can get to give constant results when the object come in, when going out at forecast boundary. Ultimately, this paper suggests empirical application to verify the adequacy and the validity with the proposed method. Accordingly, the accuracy and the quality of image recognition will be improved the surveillance system.

Development of Camera Controller with Pointer Tracking Unit (카메라 컨트롤러를 이용한 포인터 추적 장치 개발)

  • Lee, Yong-hwan;Ju, Hyun-woong;Song, Sung-hae
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.1 no.3
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    • pp.111-117
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    • 2008
  • Presentation with a projector and a laser pointer is widely used in seminar or conference. The function of a laser pointer in the presentation is just indicating a certain object. In this paper, to give a mouse-like function to a laser pointer, we implement a system that locates the track of a laser pointer. The system contains a FPGA that implements camera interface and noise filter. A software for ARM processor is programmed to analyze the spectrum of the captured image and track the pattern of a laser pointer with previously stored image. As a result, the tracking system could locate the position correctly most of time within 20m with 98% accuracy.

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Development of Smart laser Pointer using Image Processing (영상처리를 이용한 스마트 레이저 포인터 개발)

  • Park, Yong-Wook
    • The Journal of the Korea institute of electronic communication sciences
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    • v.11 no.12
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    • pp.1245-1250
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    • 2016
  • In this study, smart laser pointer using image processing was studied. The laser pointer tracked the light by using image processing. and the tracking signal was received to the transmitting unit. Smart laser pointer received the video signal have function of erase, write convert window, and changing of font color. It was studied that the smart laser pointer system could run pointer and mouse function on the one place.

Human Spatial Cognition Using Visual and Auditory Stimulation

  • Yu, Mi;Piao, Yong-Jun;Kim, Yong-Yook;Kwon, Tae-Kyu;Hong, Chul-Un;Kim, Nam-Gyun
    • International Journal of Precision Engineering and Manufacturing
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    • v.7 no.2
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    • pp.41-45
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    • 2006
  • This paper deals with human spatial cognition using visual and auditory stimulation. More specially, this investigation is to observe the relationship between the head and the eye motor system for the localization of visual target direction in space and to try to describe what is the role of right-side versus left-side pinna. In the experiment of visual stimulation, nineteen red LEDs (Luminescent Diodes, Brightness: $210\;cd/^2$) arrayed in the horizontal plane of the surrounding panel are used. Here the LEDs are located 10 degrees apart from each other. Physiological parameters such as EOG (Electro-Oculography), head movement, and their synergic control are measured by BIOPAC system and 3SPACE FASTRAK. In the experiment of auditory stimulation, one side of the pinna function was distorted intentionally by inserting a short tube in the ear canal. The localization error caused by right and left side pinna distortion was investigated as well. Since a laser pointer showed much less error (0.5%) in localizing target position than FASTRAK (30%) that has been generally used, a laser pointer was used for the pointing task. It was found that harmonic components were not essential for auditory target localization. However, non-harmonic nearby frequency components was found to be more important in localizing the target direction of sound. We have found that the right pinna carries out one of the most important functions in localizing target direction and pure tone with only one frequency component is confusing to be localized. It was also found that the latency time is shorter in self moved tracking (SMT) than eye alone tracking (EAT) and eye hand tracking (EHT). These results can be used in further study on the characterization of human spatial cognition.

Laser Pointer Tracking Using CamShift Algorithm (CamShift 알고리즘을 사용한 레이저 포인터 추적)

  • Ahn, Ho-Young;Park, Jong-Seung;Choi, Soon-Pil
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.566-569
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    • 2010
  • 레이저 포인터를 검출하는 과정은 포인터의 위치를 검출하는 과정과 입력된 레이저 포인터의 좌표를 모니터의 좌표로 변환하는 과정으로 나눌 수 있다. 레이저 포인터의 추적에 있어서 다변하는 환경의 영향으로 강건성의 확보가 어렵다. 기존의 추적 방식인 Mean-Shift 알고리즘의 경우에는 계산량이 많아서 실시간으로 입력되는 동영상에는 부적합하다. 반면에 CamShift 알고리즘은 빠른 수행이 가능하여 비디오 영상 및 실시간 영상에 적용하기에 적합하고 배경 변화의 영향을 적게 받는다. 또한 검출하려는 색과 같은 색에 의해서 간섭 받는 현상을 방지할 수 있다. 배경이 복잡한 형태이거나 배경이 동적으로 움직일 때에도 강건한 결과를 얻을 수 있다. 제안된 알고리즘을 실환경에 적용한 결과 검출하고자 하는 물체가 예측 영역을 넘나들거나 또는 화면으로부터 지나치게 멀어지거나 가까워져서 상대적인 크기가 변화할 수 있는 불확실한 변화에도 안정적으로 반응함을 알 수 있었다.

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