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Hyperspectral Technique Classifies and Identifies Textile Fibers

Pre-proof research from Analytical Chimica Acta suggested a method for non-destructive, fast, and accurate classification and identification of textile fibers based on the one-dimensional convolutional neural network (1D-CNN) model and hyperspectral imaging (HSI) technique.

Study: Non-destructive detection and classification of textile fibres based on hyperspectral imaging and 1D-CNN. Image Credit: Matveev Aleksandr/Shutterstock.com

Textile fiber is widely used in everyday life, and its categorization and identification are crucial in textile recycling, public safety and archaeology. However, traditional identification techniques are time-consuming, labor-intensive, and often damage the samples.

This research shows that combining deep learning neural networks with hyperspectral imaging enables a non-destructive method of detecting and classifying textile fibers.

Significance of Classification and Identification of Textile Fibers

Fabrics are made from textile fibers, which may be natural or synthetic. Cotton and wool are natural fibers that comprise plant and animal fibers. Synthetic fiber is a silk thread made of raw fiber material through spinneret holes such as polyethene terephthalate (PET), lyocell, and polypropylene (PP).

Identifying the class fiber is an important part of various industries. Textile fibers may constitute vital evidence at a crime scene and play a critical role in identifying unsolved crimes. Tracing the origin of textile fibers contributes to the resolution of the matter and gives substantial evidence for the lawsuit.

Textile fiber identification in waste fabrics that is both non-destructive and efficient is also essential for repurposing textiles. Therefore, creating a rapid and precise technique for identifying textile fibers is critical.

Traditional Textile Fibers Detection Techniques

The microscopic investigation, visual examination and burning are traditional techniques for detecting textile fibers. With the continual development and advancement of technology, chromatography and spectral approaches are now employed in textile fiber detection techniques.

However, these approaches are time-consuming, have low absorption intensity, poor spectral quality, and excessive baseline noise. As a result, distinguishing textile fibers with these techniques is difficult.

Hyperspectral Imaging and Machine Learning for Textile Fibers Detection

High spectral resolution and multiple bands are distinctive qualities of hyperspectral imaging (HSI). Consequently, HSI has been used extensively in food detection and agriculture, including food categorization, component identification, and pesticide detection.

In image identification, hyperspectral imaging is often accomplished by machine learning techniques. However, typical machine learning approaches have poor computing efficiency and precision for large-volume hyperspectral imaging data. No applicable hyperspectral classification of textile fibers has been conducted to date.

Using the 1D-CNN Model to Detect and Classify Textile Fibers

J. Huang et al. focused on the recognition and classification of textile fiber hyperspectral data by implementing a one-dimensional convolutional neural network and compared it with back propagation neural network (BPNN).

Hyperspectral imaging of 25 different types of commercial textile fibers was denoised and collected by pixel fusion to conduct an accurate, efficient, and reasonable identification investigation of textile fiber evidence.

The hyperspectral data of fiber samples was analyzed using four machine learning classification models: support vector machine (SVM), k-nearest neighbors (KNN), partial least squares-discriminant analysis (PLS-DA), and random forest (RF).

One-dimensional convolutional neural network (1D-CNN) and a back propagation neural network (BPNN) models were prepared and trained to identify and classify the hyperspectral data.

The 1D-CNN model was compared against the four traditional machine learning models and the BPNN model to determine the most accurate and efficient identification model.

Important Findings of the Study

Most textile fibers exhibited little changes, and the forms of the reflectance spectra were quite similar, posing a significant problem and difficulties for intuitive sample categorization. As a result, the hyperspectral data was evaluated using machine learning.

The classification of the textile fiber dataset using standard machine learning (ML) models revealed that the random forest (RF) model performed better than the other three traditional ML models, with an accuracy rate of 91.4%.

The findings revealed that selecting the right neural network was critical. The classification model created by 1D-CNN outperformed BPNN. The accuracy of the 1D-CNN in test sets and training was more than 98%, whereas the BPNN model was less than 88%.

The 1D-CNN model's sensitivity (Se), precision (Pr), F1 score, and specificity (Sp) achieved 98.6%, 98.7%, 98.6%, and 99.9%, respectively. These values were much higher than those of the four conventional machine learning models.

The findings demonstrated that the 1D-CNN model was most stable and efficient at categorizing hyperspectral textile fiber data.

Future Developments

The next step in this research would be to gather more detailed images of textile fiber samples and expand the database. In addition, the neural network model structure and algorithm must be further refined, and the network depth can be suitably raised to boost the precision and accuracy of the detection of samples.

Reference

J. Huang, H. He, R. Lv, G. Zhang, Z. Zhou, & X. Wang. (2022). Non-destructive detection and classification of textile fibres based on hyperspectral imaging and 1D-CNN, Analytica Chimica Acta. https://www.sciencedirect.com/science/article/abs/pii/S0003267022008091

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Owais Ali

Written by

Owais Ali

NEBOSH certified Mechanical Engineer with 3 years of experience as a technical writer and editor. Owais is interested in occupational health and safety, computer hardware, industrial and mobile robotics. During his academic career, Owais worked on several research projects regarding mobile robots, notably the Autonomous Fire Fighting Mobile Robot. The designed mobile robot could navigate, detect and extinguish fire autonomously. Arduino Uno was used as the microcontroller to control the flame sensors' input and output of the flame extinguisher. Apart from his professional life, Owais is an avid book reader and a huge computer technology enthusiast and likes to keep himself updated regarding developments in the computer industry.

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