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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/11199


    Title: Auto focusing under microscopic views by integrating multiple measures
    Authors: Ku Chin Lin(林穀欽)
    Contributor: 機械工程系
    Keywords: auto focusing
    microscopic views
    hill climbing search
    step-size adaptation
    Date: 2010-10-15
    Issue Date: 2010-10-27 15:16:11 (UTC+8)
    Abstract: Auto focusing has been implemented in many
    applications for decades. However, challenges still exist in
    design of high speed and reliability of a focusing algorithm
    under a variety of microscopic views. The clarity of images
    measured by a method is generally varying in hill-shaped
    manner with respect to lens positions at a focus region, but the
    signal-to-noise ratio of the measure is low at a far-off focused.
    This will limit the working range of focusing. This paper
    proposes a new method by integrating multiple measures for
    near and far-off focused. Monotonous variation of individual
    measures is integrated and used for expanding the working
    range of focusing control with adaptation of step size. Views
    for focusing under x50 microscopic lens using the proposed
    method are illustrated in this study. The working range is
    expanded to be 50 times of depth of field from focused.
    Feasibility of the proposed method is investigated on a
    practical PC-based system. Two case studies are provided to
    demonstrate the feasibility.
    Relation: 20I0 2nd International Asia Conference on Informatics in Control, Automation and Robotics
    Appears in Collections:[機械工程系所] 會議論文

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