The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform

Zhuang Rongbo - One of the best experts on this subject based on the ideXlab platform.

  • Generation Method of Bonjean Curves Based on the NURBS Curve and the Surface Domain
    Chinese Journal of Ship Research, 2013
    Co-Authors: Zhuang Rongbo
    Abstract:

    Compared with the cubic spline Curve,the NURBS Curve is more suitable for representing the complex Curve of the hull cross section.In order to reduce the cumulative error resulted from the conven tional trapezoidal method or Simpson method,the VB6.0 is employed to perform the secondary develop ment on AutoCAD so that the transverse section plane is obtained,and the areas as well as the area mo ments of the hull cross section can be calculated.The result shows that the proposed method is more accu rate and equally fast in calculation than the conventional algorithm,which reveals its potential in ship engi neering.Finally,the detailed procedure of generating a Bonjean Curve is summarized,and the engineering application of which is demonstrated by providing practical examples.

Lin Jin Huang - One of the best experts on this subject based on the ideXlab platform.

  • The initial study of LLS-based binocular stereo-vision system on underwater 3D image reconstruction in the laboratory
    Journal of Marine Science and Technology, 2017
    Co-Authors: Yu-hsien Lin, Kuan Po Shou, Lin Jin Huang
    Abstract:

    This study aims to develop a three-dimensional image reconstruction method based on the Laser Line Scan (LLS) technique to establish the binocular stereo-vision system for the preliminary research of obstacle detection technique of Autonomous Underwater Vehicle (AUV). A coordinate mapping relationship between 2D pixel coordinate and 3D world coordinate, which can be used to reconstruct 3D objects from 2D scan data, is established by means of direct camera calibration in air and water. In the experiments, the target object was originally designed by Computer-Aided Design (CAD) model and fabricated by the 3D printer. Subsequently, the qualities of point clouds acquired from the target object would be analyzed and compared in the stability water tank at National Cheng Kung University. The acquired point clouds would be used for polygonal surface estimation of the target object by Bonjean Curve fitting method in water, with the reference results in air. The acquisition of raw point clouds has been accessed via the transformation to grayscale, histogram equalization, image binarization and skeletonization thinning. Consequently, the results evaluated by our stereo-vision system indicate the reliability and performance in the stability water tank before the application to the obstacle-avoidance of the AUV.

Yu-hsien Lin - One of the best experts on this subject based on the ideXlab platform.

  • The initial study of LLS-based binocular stereo-vision system on underwater 3D image reconstruction in the laboratory
    Journal of Marine Science and Technology, 2017
    Co-Authors: Yu-hsien Lin, Kuan Po Shou, Lin Jin Huang
    Abstract:

    This study aims to develop a three-dimensional image reconstruction method based on the Laser Line Scan (LLS) technique to establish the binocular stereo-vision system for the preliminary research of obstacle detection technique of Autonomous Underwater Vehicle (AUV). A coordinate mapping relationship between 2D pixel coordinate and 3D world coordinate, which can be used to reconstruct 3D objects from 2D scan data, is established by means of direct camera calibration in air and water. In the experiments, the target object was originally designed by Computer-Aided Design (CAD) model and fabricated by the 3D printer. Subsequently, the qualities of point clouds acquired from the target object would be analyzed and compared in the stability water tank at National Cheng Kung University. The acquired point clouds would be used for polygonal surface estimation of the target object by Bonjean Curve fitting method in water, with the reference results in air. The acquisition of raw point clouds has been accessed via the transformation to grayscale, histogram equalization, image binarization and skeletonization thinning. Consequently, the results evaluated by our stereo-vision system indicate the reliability and performance in the stability water tank before the application to the obstacle-avoidance of the AUV.

Lu Xiao-ping - One of the best experts on this subject based on the ideXlab platform.

  • A disposal method for ship appendages in ship stability calculation
    Journal of Naval University of Engineering, 2005
    Co-Authors: Lu Xiao-ping
    Abstract:

    This paper puts forward an appendagesdisposal method in the ship stability calculation, which is based on the three order spline interpolationfunction integration. It can be used in the ship stability calculations, such as the hydrostatic Curve calculation, Bonjean Curve calculation, ship form stability arm interpolationCurve calculation, etc. The appendage effectis included by the hull offset incrementaround the appendages. As a tentative conclusion, such a method can obtain satisfactoryresults in the practical engineering calculation.

Kuan Po Shou - One of the best experts on this subject based on the ideXlab platform.

  • The initial study of LLS-based binocular stereo-vision system on underwater 3D image reconstruction in the laboratory
    Journal of Marine Science and Technology, 2017
    Co-Authors: Yu-hsien Lin, Kuan Po Shou, Lin Jin Huang
    Abstract:

    This study aims to develop a three-dimensional image reconstruction method based on the Laser Line Scan (LLS) technique to establish the binocular stereo-vision system for the preliminary research of obstacle detection technique of Autonomous Underwater Vehicle (AUV). A coordinate mapping relationship between 2D pixel coordinate and 3D world coordinate, which can be used to reconstruct 3D objects from 2D scan data, is established by means of direct camera calibration in air and water. In the experiments, the target object was originally designed by Computer-Aided Design (CAD) model and fabricated by the 3D printer. Subsequently, the qualities of point clouds acquired from the target object would be analyzed and compared in the stability water tank at National Cheng Kung University. The acquired point clouds would be used for polygonal surface estimation of the target object by Bonjean Curve fitting method in water, with the reference results in air. The acquisition of raw point clouds has been accessed via the transformation to grayscale, histogram equalization, image binarization and skeletonization thinning. Consequently, the results evaluated by our stereo-vision system indicate the reliability and performance in the stability water tank before the application to the obstacle-avoidance of the AUV.