Optical EngineeringFabric wrinkle evaluation using laser triangulation and neural network classifier
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Wrinkling is one of the most important fabric performance properties, which are routinely evaluated in reference to a set of visual standards in the textile industry. The visual evaluation is unreliable and time-inefficient. An industrial need for objective and automatic evaluation methods has been increasing markedly in the recent years. An image analysis system is developed to meet this need. The laser line triangulation method is used to measure the 3D surface data of a wrinkled fabric, and a neural network is built to execute the wrinkle classification with respect to the visual standard. Due to the directionality of wrinkles, a rotary stage is used to change the sample's orientation under the camera so that multiple images of the sample can be captured at different angles and more wrinkle data can be extracted for classification. The wrinkle classifications provided by the system are highly consistent with the visual standards, showing the potential for replacing human graders in fabric wrinkling evaluations.