Vision system for auto-detection of cashmere pigmented fibers

Su, Zhenwei; Dehghani, Abbas; Zhang, Liwei; King, Tim; Greenwood, Barry

doi:10.1117/12.474033

Cited by 2 publications

(4 citation statements)

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“…Figure 4b displays a pigmented virgin cashmere in which are clearly visible pigment granules unevenly distributed on the surface of the fiber. 35 The same pigment deposition in the fibers can be observed in recycled cashmere (Figure 4d), supporting the considerations already pointed out by the NIR analysis.…”

Section: ■ Results and Discussionsupporting

confidence: 85%

“…Figure a depicts a white virgin cashmere with typical regular scale shape and frequency, and similar surface features can be observed in recycled cashmere (Figure c). Figure b displays a pigmented virgin cashmere in which are clearly visible pigment granules unevenly distributed on the surface of the fiber . The same pigment deposition in the fibers can be observed in recycled cashmere (Figure d), supporting the considerations already pointed out by the NIR analysis.…”

Section: Resultssupporting

confidence: 82%

“…Because the presence of color used for dyeing cashmere does not affect the spectral baseline, the presence of pigments can be detected by NIR analysis. 7,35 In Figure 3a, the spectra of virgin (black solid line) and virgin pigmented cashmere (black dotted line) are reported, whereas in Figure 3b, the spectra of recycled (black solid line) and recycled pigmented cashmere (red dotted line) are shown.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Thus, the virgin and the recycled cashmere fibers can either be pigmented or not, but a visual comparison between the two kinds of cashmere is difficult because recycled samples are usually found to be dyed in different colors. Because the presence of color used for dyeing cashmere does not affect the spectral baseline, the presence of pigments can be detected by NIR analysis. , In Figure a, the spectra of virgin (black solid line) and virgin pigmented cashmere (black dotted line) are reported, whereas in Figure b, the spectra of recycled (black solid line) and recycled pigmented cashmere (red dotted line) are shown.…”

Section: Resultsmentioning

confidence: 99%

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Identification and Quantitative Determination of Virgin and Recycled Cashmere: a Near-Infrared Spectroscopy Study

Anceschi

Zoccola

Mossotti

et al. 2022

ACS Sustainable Chem. Eng.

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Cashmere plays an important role in luxury fashion due to its characteristics of fineness, warmth, and softness. In the frame of "green economy", many companies have started to produce and market recycled cashmere textiles. Recycled cashmere is derived from postfactory and post-consumer waste. The mechanical action involved in recycling cashmere causes severe damage to the fibers, affecting their morphological and mechanical properties. In order to safeguard the consumers and the companies from possible adulteration, a correct identification of fibers is required. NIR spectroscopy was applied to analyze and distinguish virgin and recycled cashmere fibers. Because no significant differences can be seen in the recorded spectra, the principal component analysis (PCA) combined with the soft independent modeling class analogy (SIMCA) method allows the classification of fibers into two distinct classes, leading to a sure identification of recycled and virgin cashmere. A calibration curve was also performed in order to quantify recycled cashmere fibers in a blend with virgin ones. The interclass distance in the SIMCA method was found to be 249.77, whereas the results from quantitative calibration show a standard error of prediction value of 5.8% w/w (for a mean value of 50% w/w). Microscopy analysis was also carried out to confirm the origin of the recycled cashmere. These preliminary results confirmed that the NIR spectroscopy coupled with chemometric methods might be a useful tool for the rapid screening of recycled cashmere fibers and their raw quantification in a blend.

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Section: ■ Results and Discussionsupporting

confidence: 85%

Section: Resultssupporting

confidence: 82%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Identification and Quantitative Determination of Virgin and Recycled Cashmere: a Near-Infrared Spectroscopy Study

Anceschi

Zoccola

Mossotti

et al. 2022

ACS Sustainable Chem. Eng.

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Colour Classification Method for Recycled Melange Fabrics

Furferi¹

2011

J. of Applied Sciences

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Classification of wasted woollen textiles on the basis of their colour is a basic approach for the supply of a raw material which does not involve the cost of the colouring process. Colour classification is a very difficult task, especially when a fabric is composed by differently coloured fibre (melange fabric). Many systems have been developed in the last years for colour classification of textiles. Unfortunately such colour classification systems are not able to correctly classify melange fabrics. In the present work a method for real-time classification of melange colour woollen fabrics is proposed. The provided approach, that is suitable also for classifying solid colour fabrics, integrates a Machine Vision (MV) system, able to acquire high resolution images, with a clustering algorithm capable of mapping the colour pixel of fabric images into a series of colour classes.The proposed system provides a colour classification with a misclassification less than 10% when compared with the classification resulting from a panel of expert human operators. A comparison between the proposed method and some tools stated in scientific literature is also afforded.

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Vision system for auto-detection of cashmere pigmented fibers

Cited by 2 publications

References 1 publication

Identification and Quantitative Determination of Virgin and Recycled Cashmere: a Near-Infrared Spectroscopy Study

Identification and Quantitative Determination of Virgin and Recycled Cashmere: a Near-Infrared Spectroscopy Study

Colour Classification Method for Recycled Melange Fabrics

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