Near Infrared Spectral Linearisation in Quantifying Soluble Solids Content of Intact Carambola

Omar, Ahmad; MatJafri, M. Z.

doi:10.3390/s130404876

Cited by 11 publications

(3 citation statements)

References 14 publications

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“…Omar et al. 23 noted that absorptions at 740, 950, and 970 nm are associated with the SSC of carambolas.…”

Section: Methodsmentioning

confidence: 99%

P-Wave Visible–Shortwave–Near-Infrared (Vis-SW-NIR) Detection System for the Prediction of Soluble Solids Content and Firmness on Wax Apples

Hua¹,

Hsu²,

Han³

2019

Appl Spectrosc

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A nondestructive system for measuring the soluble solids content (SSC) and firmness of wax apples was developed using 670, 850, 880, 940, and 980 nm visible–shortwave–near-infrared (Vis-SW-NIR) light-emitting diode (LED) light sources and a silicon (Si) photodetector. These specified wavelengths are highly correlated with the SSC and the firmness of fruit. An LED light source was incident onto the fruit as parallel-polarized waves (P-wave) at the Brewster angle (θB) to minimize the interfacial reflection and maximize the C–H and O–H bonds absorption signals from the fruit. Partial least squares (PLS) regression is used to build calibration modes and analyze the prediction of the correlation ([Formula: see text]) and the root mean square error for prediction (RMSEP) of the reflected optical signals with SSC and firmness. This resulted in [Formula: see text] and RMSEP values of 0.87 and 0.66 °Bx, respectively, in SSC measurements and 0.80 and 1.16 N/cm2, respectively, in firmness measurements. Therefore, the result shows [Formula: see text] of SSC and firmness are 6.4% and 9% higher and the RMSEP are 14% and 20% lower, respectively, than those obtained using non-polarized LED light sources.

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“…Omar et al. 23 noted that absorptions at 740, 950, and 970 nm are associated with the SSC of carambolas.…”

Section: Methodsmentioning

confidence: 99%

P-Wave Visible–Shortwave–Near-Infrared (Vis-SW-NIR) Detection System for the Prediction of Soluble Solids Content and Firmness on Wax Apples

Hua¹,

Hsu²,

Han³

2019

Appl Spectrosc

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show abstract

“…Fruit color was evaluated by manual observation and measurement with a colorimeter. Manual observations were evaluated by the fruit ripening index, which is a scale from 1 to 6 as described by Omar et al (2012) with minor modifications: (1) Bright green in color, green-mature; (2) green with a small amount of yellowish color; (3) more green than yellow; (4) more yellow than green;…”

Section: Evaluation Of Fruit Ripeningmentioning

confidence: 99%

Exogenous 2,4-Epibrassinolide Treatment Maintains the Quality of Carambola Fruit Associated With Enhanced Antioxidant Capacity and Alternative Respiratory Metabolism

Zhu

Chen

et al. 2021

Front. Plant Sci.

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Brassinosteroids act by delaying fruit ripening. The effects of different concentrations of 2,4-epibrassinolide (eBL) treatments on carambola fruit ripening were investigated. The results show that treatment of 2.8 mg L–1, eBL with 10 min effectively delays ripening and maintains the quality of carambola fruit. This is achieved by retarding color changes and firmness losses while maintaining high level of soluble protein content and vitamin C, and low organic acid content. eBL-delayed senescence may be due to the inhibition of respiration rate and enhanced antioxidant system. It is noteworthy that eBL treatment markedly reduces the content of fructose-6-phosphate (6-P-F) and enhances the activity of cytochrome oxidase (CCO), and the total activity of glucose-6-phosphate dehydrogenase (G-6-PDH) and 6-phosphate gluconate dehydrogenase (6-PGDH). eBL treatment induces the IAA and GA contents but reduces that of ABA. In general, senescence retardation and quality improvement by eBL treatment may be due to the enhanced antioxidant capacity and altered respiratory pathways.

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“…The fruits continuously lost moisture degradation of fruit throughout the next levels. Raw fruit with little sugar content will have high reflectance, whereas mature or over-mature fruit with high sugar content would have low reflectance [5]. Sugar content spectral bands last from 734 -946 nm.…”

Section: Resultsmentioning

confidence: 99%

Using VIS – NIR imaging for non-intrusive Musa Acuminata banana color changes assessment over a maturity period

Nguyen,

Ta Ngoc,

Duong

et al.

EPiC Series in Engineering

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Bananas are a source of nourishment that is essential for good health. During ripening, the pigment content, starch index and sugar content of banana fruit change, providing accurate indicators for maturity classification. However, at present, banana fruits are traded according to their color stage. The purpose of this study is to visualize analysis banana color changes using a nondestructive method based on multispectral image processing since fruit quality can be assessed quickly, while the fruit being tested is still whole and marketable. This experiment designed a monochromatic camera and a set of four different optical wavelengths in VIS-NIR bands of Blue (465-467nm), Green (522- 525nm), Red (620-625nm) and Near-IR (peak at 940nm) to capture the multispectral images of Musa Acuminata banana. This advanced optical detection technique (multi- spectral imaging) can provide the spectral reflectance of any pixel, combined with the preprocessing of a binary mask to create image segmentation, the ROIs (Region of Interest segmentation) method is then used for extracting spectral intensity data on the banana surface of each single wavelength over the ripening process of banana. With an understanding of the optical characteristics of fruit tissues (both external and internal characteristics), this research focuses on external characteristics (color components) to properly assess banana quality. The outcomes demonstrate that the behavior of resulting graphs successfully determine spectral intensity profile changes to classify the color changes as well as four main stages of classification of raw, unripe, ripe and overripe banana.

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Near Infrared Spectral Linearisation in Quantifying Soluble Solids Content of Intact Carambola

Cited by 11 publications

References 14 publications

P-Wave Visible–Shortwave–Near-Infrared (Vis-SW-NIR) Detection System for the Prediction of Soluble Solids Content and Firmness on Wax Apples

P-Wave Visible–Shortwave–Near-Infrared (Vis-SW-NIR) Detection System for the Prediction of Soluble Solids Content and Firmness on Wax Apples

Exogenous 2,4-Epibrassinolide Treatment Maintains the Quality of Carambola Fruit Associated With Enhanced Antioxidant Capacity and Alternative Respiratory Metabolism

Using VIS – NIR imaging for non-intrusive Musa Acuminata banana color changes assessment over a maturity period

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