Journal Published Online: 20 January 2014
Volume 42, Issue 2

Automatic Measurement of Yarn Crimp Using Image Analysis

CODEN: JTEVAB

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, KR
Lee, Moo
Faculty of Applied Chemical Engineering, Chonnam National Univ., Gwangju, KR
Kim, Sungmin
Dept. of Polymer and Fiber System Engineering, Chonnam National Univ., Gwangju, KR
Pages: 8
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20130045
ISSN: 0090-3973
DOI: 10.1520/JTE20130045