The provenance of nephrite in China based on multi-spectral imaging technology and gray-level co-occurrence matrix

Chen, Dian; Huang, Wei; Wei, Luo; Wang, Changsui

doi:10.1039/c8ay01274a

Cited by 11 publications

(12 citation statements)

References 15 publications

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“…The multi-spectral imaging system model CRi Nuance made in USA was used in this study [28]. The specific components are described in detail in our previous paper [17]. The images are acquired in the wavelength range of 450 with the scanning step of 10 nm, which covers the visible (VIS) and near-infrared (NIR).…”

Section: Multispectral Imagingmentioning

confidence: 99%

“…We are committed to transforming this traditional experience into a more scientific presentation. After some tentative experiment and verification, the image of sub-microstructure in the nephrite has be successfully recorded by multispectral technology, which makes a solid base for the exploration of nephrite provenance [17]. On this basis, this paper introduces that a series of optical and mathematical processing methods are further adopted to improve the quality of the image of sub-microstructure, which can establish a reference standard and provide a more accurate and convenient judgment foundation for the market and collectors.…”

Section: Introductionmentioning

confidence: 99%

“…As a kind of identification feature with important reference value, it is applied in daily market transactions, and as a valuable practical experience, it is only passed on by word of mouth. Under these circumstances, it has not been scientifically studied in the past, and even not been recorded reasonably and effectively with good images [17].…”

Section: Introductionmentioning

confidence: 99%

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Sub-microstructures of Nephrite from Five Sources Based on Multispectral Imaging and Effect Enhancement

Chen

Wei

et al. 2020

AJARR

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Some collectors and connoisseurs have found that the nephrite from different sources possess different sub-microstructures inside the body, which could become a quite convenient and effective basis for determining provenance. The sub-microstructure of nephrite can be observed by the naked eye under irradiated by strong light. However, the images of original submicrostructure of nephrite were recorded by use of multispectral imaging in our previous work, but the visual effect is not satisfied. Here, the main features of different sub-microstructures will present more distinct by appropriately subtracting the shining strength and then the average filtering is adopted to promote the resolution of sub-microstructure imaging as well as to reduce some image noises. The sub-microstructure images of nephrite from five most common sources have typical inherent characteristics respectively, which are qualified to set up a demonstration for identifying provenances. Furthermore, the shape, size, distribution and name for these different sub-microstructures have been summarized and they will become the basis for future research on the provenance of nephrite including the ancient jade.

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Section: Multispectral Imagingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sub-microstructures of Nephrite from Five Sources Based on Multispectral Imaging and Effect Enhancement

Chen

Wei

et al. 2020

AJARR

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“…The step angles are given as 0°(horizontal), 45°, 90°and 135°, for example. 16 Other angles have been used in the literature. 17 The effect of different d values on energy and entropy was not found in the literature.…”

Section: Introductionmentioning

confidence: 99%

Comparison of three image‐analysis‐based visual texture calculation methods: energy, entropy, and texture change index

Balaban

Gümüş

2022

J Sci Food Agric

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BACKGROUND Three image analysis methods to measure visual texture were applied to an image with much texture (scaled carp), and one with little texture (mirror carp). For each method, the effect of image rotation at 0°, 10°, 20°, 30°, 45°, 60°, 75° and 90° was evaluated. RESULTS Rotation did not change energy (E) and entropy (H) calculations using image histograms. Using co‐occurrence matrices with different step size d (1–19 in increases of 2) and step angle θ (0°, 45°, 90° and 135°) showed that, as d increased, E decreased and H increased, and the number of legitimate pixel pairs decreased linearly. Averaging E and H at different θ values rendered the results rotation invariant. Theoretically, the ‘texture primitives’ method is not rotation independent. However, the variation in texture change index (TCI) with image rotation was negligible. Also, the increase in TCI between the less textured image and the more textured image was 5.3–11. In comparison, the E values from histograms for the images above were 0.0069–0.0081. For co‐occurrence matrix‐based calculations, at d = 1 and for all θ, E range was from 220 to 389 for scaled carp and from 232 to 412 for mirror carp. CONCLUSION The more than doubling of TCI for these images implies that it is a more precise method than energy and entropy to discern between visual texture levels. © 2022 Society of Chemical Industry.

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“…Chen et al . (2018) employ multispectral imaging technology to acquire data on the submicroscopic structures of nephrite from seven regions. Through a grey‐level co‐occurrence matrix that digitizes the data, they create a final cluster analysis that offers a better visualization of the categorization results.…”

Section: Introductionmentioning

confidence: 99%

Complex raw materials and the supply system: Mineralogical and geochemical study of the jade artefacts of the Longshan Culture (2400–2000 bce) from Sujiacun site in coastal Shandong, China

Zhang

Sun

et al. 2020

Archaeometry

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X‐ray fluorescence (XRF), X‐ray diffraction (XRD) and Raman spectroscopy were employed to analyse the chemical compositions and phase structures of nine pieces of jade artefacts unearthed from Sujiacun, a Longshan Culture (2400–2000 bce) site in coastal Shandong, eastern China. The results of the analyses indicated these samples were primarily made from multiple raw mineral materials, including antigorite, actinolite, clinochlore, turquoise and muscovite. No nephrite was recovered from the Sujiacun site. This is strikingly different from other top‐ranking settlements of Longshan Culture, such as Dantu, Liangchengzhen and Xizhufeng, in which nephrite was the main material of jade artefacts. This may reflect the distinctions in the supply system of jade raw materials among different rankings of Longshan period sites. In addition, laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) was used to analyse the composition of the rare earth elements of serpentine jade. These preliminary results were compared with published data on the composition of serpentine jade and it was found that the Sujiacun serpentine jade artefacts were likely sourced from the Taishan jade deposit.

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The provenance of nephrite in China based on multi-spectral imaging technology and gray-level co-occurrence matrix

Abstract: The provenance of nephrite is the basis for the research, restoration and collection of nephrite artifacts.

Cited by 11 publications

References 15 publications

Sub-microstructures of Nephrite from Five Sources Based on Multispectral Imaging and Effect Enhancement

Sub-microstructures of Nephrite from Five Sources Based on Multispectral Imaging and Effect Enhancement

Comparison of three image‐analysis‐based visual texture calculation methods: energy, entropy, and texture change index

Complex raw materials and the supply system: Mineralogical and geochemical study of the jade artefacts of the Longshan Culture (2400–2000 bce) from Sujiacun site in coastal Shandong, China

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