• Title/Summary/Keyword: VIDEO CAMERA

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Design of Real-Time Video Play System Using Web Camera

  • Seung Ju Jang
    • International journal of advanced smart convergence
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    • v.12 no.3
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    • pp.25-31
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    • 2023
  • This paper designs a real-time video playback system using a web camera in the RTSP server. It designs a function to play the video data of the web camera in the client in real time using the web camera in the server and using the RTSP protocol. It consists of a server module function that produces real-time video information using a web camera and a client module function that plays video received from the server in real time. The experiment was conducted by establishing an environment for designing a real-time video playback system using a web camera. As a result of the experiment, it was confirmed that real-time video playback from the server's web camera worked well.

Offline Camera Movement Tracking from Video Sequences

  • Dewi, Primastuti;Choi, Yeon-Seok;Cha, Eui-Young
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2011.05a
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    • pp.69-72
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    • 2011
  • In this paper, we propose a method to track the movement of camera from the video sequences. This method is useful for video analysis and can be applied as pre-processing step in some application such as video stabilizer and marker-less augmented reality. First, we extract the features in each frame using corner point detection. The features in current frame are then compared with the features in the adjacent frames to calculate the optical flow which represents the relative movement of the camera. The optical flow is then analyzed to obtain camera movement parameter. The final step is camera movement estimation and correction to increase the accuracy. The method performance is verified by generating a 3D map of camera movement and embedding 3D object to the video. The demonstrated examples in this paper show that this method has a high accuracy and rarely produce any jitter.

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Development of Network Camera-based Instant Messenger (네트워크 카메라 기반 인스턴트 메신저의 개발에 대한 연구)

  • Lee, Kang-Seok;Yum, Chang-Sun
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.33 no.2
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    • pp.133-139
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    • 2010
  • PC camera-based instant messenger have problems of video image break/delay and noise. The reason is caused by a composed problem that PC Camera is belong to the connected PC and operating in the PC. This research suggests an instant messenger that uses network camera connected to LAN instead of PC camera. Therefore, the instant messenger has a component that the camera is separated from PC. This research designs sequence diagram, video calls flow chart, and graphic user interface of the instant messenger. The instant messenger based on network camera provides high quality video calls service and makes it possible to call from a special remote site with real-time video image.

Enhanced Augmented Reality with Realistic Shadows of Graphic Generated Objects (비디오 영상에 가상물체의 그림자 삽입을 통한 향상된 AR 구현)

  • 김태원;홍기상
    • Proceedings of the IEEK Conference
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    • 2000.09a
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    • pp.619-622
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    • 2000
  • In this paper, we propose a method for generating graphic objects having realistic shadows inserted into video sequence for the enhanced augmented reality. Our purpose is to extend the work of [1], which is applicable to the case of a static camera, to video sequence. However, in case of video, there are a few challenging problems, including the camera calibration problem over video sequence, false shadows occurring when the video camera moves and so on. We solve these problems using the convenient calibration technique of [2] and the information from video sequence . We present the experimental results on real video sequences.

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Digital Video Camera Characterization Considering White Balance (White Balance를 고려한 디지털 비디오 카메라 Characterization)

  • 박종선;김대원;장수욱;김은수;송규익
    • Proceedings of the IEEK Conference
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    • 2002.06d
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    • pp.299-302
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    • 2002
  • Digital video camera can be a useful tool to capture images for use in colorimeter. However, the RGB signals generated by different digital video camera are not equal for the same scene. The digital video camera for use in colorimeter is characterized based on the CIE standard colorimetric observer. One method of deriving a colorimetric characterization matrix between camera RGB output signals and CIE XYZ tristimulus values is Polynomial modeling. In this paper, 3${\times}$3 linear matrix and 3${\times}$l1 polynomial matrix is used to investigate the characterization performance of the professional digital video camera. In experimental results, it is demonstrated that proposed 3${\times}$3 linear matrix has a reasonable degree of accuracy for use in colorimeter.

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Motion Compensated Subband Video Coding with Arbitrarily Shaped Region Adaptivity

  • Kwon, Oh-Jin;Choi, Seok-Rim
    • ETRI Journal
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    • v.23 no.4
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    • pp.190-198
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    • 2001
  • The performance of Motion Compensated Discrete Cosine Transform (MC-DCT) video coding is improved by using the region adaptive subband image coding [18]. On the assumption that the video is acquired from the camera on a moving platform and the distance between the camera and the scene is large enough, both the motion of camera and the motion of moving objects in a frame are compensated. For the compensation of camera motion, a feature matching algorithm is employed. Several feature points extracted using a Sobel operator are used to compensate the camera motion of translation, rotation, and zoom. The illumination change between frames is also compensated. Motion compensated frame differences are divided into three regions called stationary background, moving objects, and newly emerging areas each of which is arbitrarily shaped. Different quantizers are used for different regions. Compared to the conventional MC-DCT video coding using block matching algorithm, our video coding scheme shows about 1.0-dB improvements on average for the experimental video samples.

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Threshold-Based Camera Motion Characterization of MPEG Video

  • Kim, Jae-Gon;Chang, Hyun-Sung;Kim, Jin-Woong;Kim, Hyung-Myung
    • ETRI Journal
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    • v.26 no.3
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    • pp.269-272
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    • 2004
  • We propose an efficient scheme for camera motion characterization in MPEG-compressed video. The proposed scheme detects six types of basic camera motions through threshold-based qualitative interpretation, in which fixed thresholds are applied to motion model parameters estimated from MPEG motion vectors (MVs). The efficiency and robustness of the scheme are validated by the experiment with real compressed video sequences.

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Single Pixel Compressive Camera for Fast Video Acquisition using Spatial Cluster Regularization

  • Peng, Yang;Liu, Yu;Lu, Kuiyan;Zhang, Maojun
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.12 no.11
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    • pp.5481-5495
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    • 2018
  • Single pixel imaging technology has developed for years, however the video acquisition on the single pixel camera is not a well-studied problem in computer vision. This work proposes a new scheme for single pixel camera to acquire video data and a new regularization for robust signal recovery algorithm. The method establishes a single pixel video compressive sensing scheme to reconstruct the video clips in spatial domain by recovering the difference of the consecutive frames. Different from traditional data acquisition method works in transform domain, the proposed scheme reconstructs the video frames directly in spatial domain. At the same time, a new regularization called spatial cluster is introduced to improve the performance of signal reconstruction. The regularization derives from the observation that the nonzero coefficients often tend to be clustered in the difference of the consecutive video frames. We implement an experiment platform to illustrate the effectiveness of the proposed algorithm. Numerous experiments show the well performance of video acquisition and frame reconstruction on single pixel camera.

A DSP Circuit Design on Improvement of Video Signal With High Sensotivity CCD Sensor Camera (고감도 CCD센서 카메라의 영상신호 성능향상을 위한 DSP 회로 설계)

  • Park, Jae-Chul;Kim, Yong-Deak
    • Proceedings of the IEEK Conference
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    • 2007.07a
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    • pp.331-332
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    • 2007
  • This Paper deals with the high sensitive camera circuit design, which is more sensitive than those on the market now in a way that it got rid of chronic smearing problem in CCD sensor and other kinds of noises in video signal effectively. This paper focused on the principle of CCD and video signal process and analyzed the specialized technique of industry and fundamental high sensitivity of CCTV camera. 1 also looked into the SONY super-HAD CCD camera which is very popular in the field now and compared this with the SONY EXview CCD camera to analyze the picture improvement using video test equipment. For the result, it had 190mv on camera sensitivity, 14dB on smearing, and 2dB on signal to noise ratio.

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Design and Implementation of ONVIF Video Analytics Service for a Smart IP Network camera (Smart IP 네트워크 카메라의 비디오 내용 분석 서비스 설계 및 구현)

  • Nguyen, Vo Thanh Phu;Nguyen, Thanh Binh;Chung, Sun-Tae;Kang, Ho-Seok
    • Proceedings of the Korea Multimedia Society Conference
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    • 2012.05a
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    • pp.102-105
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    • 2012
  • ONVIF is becoming a de factor standard specification for supporting interoperability among network video products, which also supports a specification for video analytics service. A smart IP network camera is an IP network supporting video analytics. In this paper, we present our efforts in integrating ONVIF Video Analytics Service into our currently developing smart IP network camera(SS IPNC; Soongsil Smart IP Network Camera). SSIPNC supports object detection, tracking, classification, and event detection with proprietary configuration protocol and meta data formats. SSIPNC is based on TI' IPNC ONVIF implementation which supports ONVI Core specification, and several ONVIF services such as device service, imaging service and media service, but not video analytics service.

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