The Experts below are selected from a list of 60006 Experts worldwide ranked by ideXlab platform

Yudong Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Precision targeting for retinal motion extraction using cross-correlation with a High Speed Line scanning ophthalmoscope
    Journal of Optics, 2015
    Co-Authors: Ling Wei, Zhibin Wang, Guohua Shi, Jinsheng Yang, Li Xiqi, Yudong Zhang
    Abstract:

    Evaluations to quantify the precise targeting of template features and to select template sizes for retinal motion extraction were carried out using cross-correlation with a High Speed Line scanning ophthalmoscope (LSO) capable of 160 frames per second. The optimal template targeting was located on a retinal vessel pattern with vessel bifurcation or vessel features occupying approximately eighty percent of the template area preferred. The optimal template size for this LSO system was 80 x 80 pixels and it was able to extract retinal motion up to 300 deg s(-1) at a Speed of 30 Hz. Although the optimized template size was a compromise between having enough image data on the retinal features to make matches reliably and have good temporal resolution, the optimal targeting of the template location and size described here was appropriate and effective in extracting retinal motion. In addition, the determination of cross-correlation templates could be applied to other images having similar properties; i.e., relatively small features of distinct gray levels on an otherwise fairly uniform background.

  • Compact High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope (LSO) for retina imaging is presented in this paper. By using a Line beam to illuminate the retina, meanwhile a Linear array sensor is used for imaging the retina, the LSO system significantly reduces the size, complexity, and cost comparing to a conventional confocal scanning laser ophthalmoscope (CSLO). With only one moving scanner to provide raster scanning of the Line beam of the retina, the imaging frequency achieves 160 Hz and the lateral resolution is nearly 10 μm for 1024×330 pixels imaging mode. Preliminary experiments are performed for imaging the macula, the optic nerve head and other targets, providing High resolution and High Speed videos of human retina.

  • Compact, High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Biomedical Optics 2014, 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope significantly reduces the size, complexity, and cost of a conventional scanning laser ophthalmoscope. The imaging frequency achieves 160 Hz and the lateral resolution is 8 µm.

Zhibin Wang - One of the best experts on this subject based on the ideXlab platform.

  • Precision targeting for retinal motion extraction using cross-correlation with a High Speed Line scanning ophthalmoscope
    Journal of Optics, 2015
    Co-Authors: Ling Wei, Zhibin Wang, Guohua Shi, Jinsheng Yang, Li Xiqi, Yudong Zhang
    Abstract:

    Evaluations to quantify the precise targeting of template features and to select template sizes for retinal motion extraction were carried out using cross-correlation with a High Speed Line scanning ophthalmoscope (LSO) capable of 160 frames per second. The optimal template targeting was located on a retinal vessel pattern with vessel bifurcation or vessel features occupying approximately eighty percent of the template area preferred. The optimal template size for this LSO system was 80 x 80 pixels and it was able to extract retinal motion up to 300 deg s(-1) at a Speed of 30 Hz. Although the optimized template size was a compromise between having enough image data on the retinal features to make matches reliably and have good temporal resolution, the optimal targeting of the template location and size described here was appropriate and effective in extracting retinal motion. In addition, the determination of cross-correlation templates could be applied to other images having similar properties; i.e., relatively small features of distinct gray levels on an otherwise fairly uniform background.

  • Compact High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope (LSO) for retina imaging is presented in this paper. By using a Line beam to illuminate the retina, meanwhile a Linear array sensor is used for imaging the retina, the LSO system significantly reduces the size, complexity, and cost comparing to a conventional confocal scanning laser ophthalmoscope (CSLO). With only one moving scanner to provide raster scanning of the Line beam of the retina, the imaging frequency achieves 160 Hz and the lateral resolution is nearly 10 μm for 1024×330 pixels imaging mode. Preliminary experiments are performed for imaging the macula, the optic nerve head and other targets, providing High resolution and High Speed videos of human retina.

  • Compact, High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Biomedical Optics 2014, 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope significantly reduces the size, complexity, and cost of a conventional scanning laser ophthalmoscope. The imaging frequency achieves 160 Hz and the lateral resolution is 8 µm.

Guohua Shi - One of the best experts on this subject based on the ideXlab platform.

  • Precision targeting for retinal motion extraction using cross-correlation with a High Speed Line scanning ophthalmoscope
    Journal of Optics, 2015
    Co-Authors: Ling Wei, Zhibin Wang, Guohua Shi, Jinsheng Yang, Li Xiqi, Yudong Zhang
    Abstract:

    Evaluations to quantify the precise targeting of template features and to select template sizes for retinal motion extraction were carried out using cross-correlation with a High Speed Line scanning ophthalmoscope (LSO) capable of 160 frames per second. The optimal template targeting was located on a retinal vessel pattern with vessel bifurcation or vessel features occupying approximately eighty percent of the template area preferred. The optimal template size for this LSO system was 80 x 80 pixels and it was able to extract retinal motion up to 300 deg s(-1) at a Speed of 30 Hz. Although the optimized template size was a compromise between having enough image data on the retinal features to make matches reliably and have good temporal resolution, the optimal targeting of the template location and size described here was appropriate and effective in extracting retinal motion. In addition, the determination of cross-correlation templates could be applied to other images having similar properties; i.e., relatively small features of distinct gray levels on an otherwise fairly uniform background.

  • Compact High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope (LSO) for retina imaging is presented in this paper. By using a Line beam to illuminate the retina, meanwhile a Linear array sensor is used for imaging the retina, the LSO system significantly reduces the size, complexity, and cost comparing to a conventional confocal scanning laser ophthalmoscope (CSLO). With only one moving scanner to provide raster scanning of the Line beam of the retina, the imaging frequency achieves 160 Hz and the lateral resolution is nearly 10 μm for 1024×330 pixels imaging mode. Preliminary experiments are performed for imaging the macula, the optic nerve head and other targets, providing High resolution and High Speed videos of human retina.

  • Compact, High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Biomedical Optics 2014, 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope significantly reduces the size, complexity, and cost of a conventional scanning laser ophthalmoscope. The imaging frequency achieves 160 Hz and the lateral resolution is 8 µm.

Ling Wei - One of the best experts on this subject based on the ideXlab platform.

  • Precision targeting for retinal motion extraction using cross-correlation with a High Speed Line scanning ophthalmoscope
    Journal of Optics, 2015
    Co-Authors: Ling Wei, Zhibin Wang, Guohua Shi, Jinsheng Yang, Li Xiqi, Yudong Zhang
    Abstract:

    Evaluations to quantify the precise targeting of template features and to select template sizes for retinal motion extraction were carried out using cross-correlation with a High Speed Line scanning ophthalmoscope (LSO) capable of 160 frames per second. The optimal template targeting was located on a retinal vessel pattern with vessel bifurcation or vessel features occupying approximately eighty percent of the template area preferred. The optimal template size for this LSO system was 80 x 80 pixels and it was able to extract retinal motion up to 300 deg s(-1) at a Speed of 30 Hz. Although the optimized template size was a compromise between having enough image data on the retinal features to make matches reliably and have good temporal resolution, the optimal targeting of the template location and size described here was appropriate and effective in extracting retinal motion. In addition, the determination of cross-correlation templates could be applied to other images having similar properties; i.e., relatively small features of distinct gray levels on an otherwise fairly uniform background.

  • Compact High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Twelfth International Conference on Photonics and Imaging in Biology and Medicine (PIBM 2014), 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope (LSO) for retina imaging is presented in this paper. By using a Line beam to illuminate the retina, meanwhile a Linear array sensor is used for imaging the retina, the LSO system significantly reduces the size, complexity, and cost comparing to a conventional confocal scanning laser ophthalmoscope (CSLO). With only one moving scanner to provide raster scanning of the Line beam of the retina, the imaging frequency achieves 160 Hz and the lateral resolution is nearly 10 μm for 1024×330 pixels imaging mode. Preliminary experiments are performed for imaging the macula, the optic nerve head and other targets, providing High resolution and High Speed videos of human retina.

  • Compact, High-Speed Line scanning quasi-confocal ophthalmoscope and retina imaging experiments
    Biomedical Optics 2014, 2014
    Co-Authors: Zhibin Wang, Ling Wei, Guohua Shi, Yudong Zhang
    Abstract:

    A compact, High-Speed Line scanning quasi-confocal ophthalmoscope significantly reduces the size, complexity, and cost of a conventional scanning laser ophthalmoscope. The imaging frequency achieves 160 Hz and the lateral resolution is 8 µm.

Sang Heon Lee - One of the best experts on this subject based on the ideXlab platform.

  • ICRA - Visual measurement of pile penetration and rebound movement using a High-Speed Line-scan camera
    Proceedings 2002 IEEE International Conference on Robotics and Automation (Cat. No.02CH37292), 1
    Co-Authors: Se-na Lee, Bum-jae You, Mee-seub Limb, Song-soo Han, Sang Heon Lee
    Abstract:

    When a construction company builds a High structure, many piles should be driven into the ground by a hammer whose weight is 7,000 kg in order to make the ground under the structure safe and strong. So, it is essential to determine whether a pile is penetrated into the ground enough to support the weight of the structure since ground characteristics at different locations are different to each other. The paper proposes a visual measurement system for pile rebound and penetration movement including vibration using a High-Speed Line-scan camera and a specially designed mark to recognize two-dimensional motion parameters of the mark using only a Line-scan camera. A mark stacking white and black right-angled triangles is used for the measurement, and movement information for vertical distance, horizontal distance and rotational angle is determined simultaneously. By adopting a Line-scan CCD camera whose Line rate is 20 kHz, the measurement performance of dynamic characteristics of the pile at impact instant is improved dramatically.