Volume 42, Issue 2 (March 2014)

    Automatic Measurement of Yarn Crimp Using Image Analysis

    (Received 21 February 2013; accepted 22 August 2013)

    Published Online: 2014

    CODEN: JTEOAD

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    Abstract

    Automatic crimp measurement system hardware and software have been developed. To measure the crimp of a relatively long yarn specimen under zero tension, a precise linear stage was used along with a high-definition digital microscope. Because of the narrow viewing angle of the microscope, a series of images were captured while the specimen plate was moved. The whole system was built into an opaque enclosure with internal illumination devices to prevent irregular external lighting effects. The relationship between image and world coordinates was established via automatic camera calibration. The shape of the yarn crimp was extracted via a series of image processing techniques, and quantitative information on yarn crimp, such as the crimp ratio and average crimp pitch, was calculated through Fourier series expansion and statistical analysis.


    Author Information:

    Oh, Sunhyung
    Dept. of Polymer and Fiber System Engineering, Chonnam National Univ., Gwangju,

    Lee, Moo Sung
    Faculty of Applied Chemical Engineering, Chonnam National Univ., Gwangju,

    Kim, Sungmin
    Associate Professor, Dept. of Polymer and Fiber System Engineering, Chonnam National Univ., Gwangju,


    Stock #: JTE20130045

    ISSN: 0090-3973

    DOI: 10.1520/JTE20130045

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    Author
    Title Automatic Measurement of Yarn Crimp Using Image Analysis
    Symposium , 0000-00-00
    Committee D13