Color and Size Analysis of Lemon Slice (Citrus lemon L.) during Drying Process

Year 2020, Volume: 8 Issue: 2, 1227 - 1235, 30.04.2020

Semih Özden Faruk Kılıç

https://doi.org/10.29130/dubited.638632

Abstract

The consumption of citrus, especially lemon, is very common all over the world. There are different methods for storing citrus, but the method of storing (drying) by removing the moisture is a centuries-old practice. Drying of lemon slices and drying process (determining the appropriate temperature and humidity capacity) are among the topics that are researched academically. In this study, the measurement of the weight (moisture loss) of the lemon slices, which were dried at 50 ° C in a food drying oven controlled by a coincident-centered fan-resistance, was carried out with the load cell depending on the time. In order to increase the reliability of the data and parameters, the experiments repeated three times were carried out in accordance with the TS 13706 dried lemon standard of the Turkish Standards Institute (until 10% moisture is left in the dried lemon). During the drying process, which lasted 330 minutes in total, the image was recorded at 30-minute intervals with the digital camera placed inside the oven. According to the data obtained as a result of the experiments, normalized weight loss was recorded as 75.8%. Lemon slice images were processed with edge detection algorithms and the number of pixels was determined and it was measured to show a 19.42% decrease. RGB data were obtained from digital camera and analyzed with MATLAB program. When the change in color was evaluated, the difference was determined as 13.78%. Thus, the change of the color and area of the lemon slices are revealed. The management and control of the drying process can be achieved by mathematically connecting complex network structures between these mathematical changes (color, area, weight) with MATLAB program. When the change in color was evaluated, the difference was found to be 13.78%.

Keywords

Food drying, Lemon slice, Image processing, Dimension analysis, Color analysis

Limon (Citrus limon L.) Diliminin Kurutma Sürecindeki Renk ve Boyut Analizi

Abstract

Narenciyenin özellikle de limonun tüketimi tüm dünyada oldukça yaygındır. Narenciyeyi saklamak için farklı yöntemler mevcuttur ancak içindeki nemin büyük oranda uzaklaştırarak saklama yöntemi (kurutma) yüzyıllardır süregelen bir uygulamadır. Limon dilimlerinin kurutulması ve kurutulmasının incelenmesi (uygun sıcaklık ve nem kapasitesinin belirlenmesi) akademik olarak da araştırılan konuların başında gelmektedir. Yapılan bu çalışmada, çakışık merkezli fan-rezistans ile kontrol edilen gıda kurutma fırınında 50 °C’de kurutulan limon dilimlerinin zamana bağlı olarak görüntü kaydı ve kinematik özelliklerinden ağırlığın (nem kaybının) ölçümü yük hücresi ile gerçekleştirilmiştir. Verilerin ve parametrelerin güvenirliliği arttırmak için üçer defa tekrarlanan deneyler, Türk Standartları Enstitüsü’nün TS 13706 kurutulmuş limon standardına uygun olarak (kurutulmuş limonda % 10 nem kalıncaya dek) gerçekleştirilmiştir. Toplamda 330 dakika süren kurutma sürecinde, fırın içine yerleştirilen sayısal kamera ile 30 dakikalık aralıklarla görüntü kaydedilmiştir. Yapılan deneyler sonucunda elde edilen verilere göre normalize ağırlık kaybı % 75.8 olarak kaydedilmiştir. Limon dilimi görüntüleri kenar belirleme algoritmaları ile işlenerek piksel sayısı belirlenmiş ve % 19.42 azalma gösterdiği ölçülmüştür. RGB verileri sayısal kameradan elde edilerek MATLAB programı ile analiz edilmiştir. Renkte oluşan değişim değerlendirildiğinde fark % 13.78 olarak tespit edilmiştir. Böylece limon dilimlerin renginin ve alanının değişimi ortaya çıkartılmıştır. Bu matematiksel değişimler (renk, alan, ağırlık) arasında karmaşık ağ yapıları ile matematiksel olarak bağlantı kurularak, kurutma sürecinin yönetimi, kontrolü sağlanabilir. 

Keywords

Gıda kurutma, Boyut analizi, Limon dilimi, Görüntü işleme, Renk analizi

References

• [1] Anonymous. (2018, May 24). The State of Food Security and Nutrition in the World [Online]. Available: http://www.fao.org/faostat/en/#data/QC.
• [2] G. Paggiola, S. V. Stempvoort, J. Bustamante, J. M. V. Barbero, A. J. Hunt and J. H. Clark, "Can bio-based chemicals meet demand? Global and regional case-study around citrus waste-derived limonene as a solvent for cleaning applications. " Biofuels, Bioproducts and Biorefining, vol. 10, no. 6, pp. 686-698, 2016.
• [3] F. Kılıç ve A. Köse, "Meyve-sebze kurutma makineleri için arduino tabanlı neme duyarlı fan kontrol tasarımı," 1st International Turkish World Engineering and Science Congress, Antalya, Türkiye, 2017, pp. 176-180.
• [4] D. Jain and G. N. Tiwari, "Thermal aspects of open sun drying of various crops," Energy, vol. 28, pp. 37-54, 2003.
• [5] B. K. Koua, P. M. E. Koffi and P. Gbaha, "Evolution of shrinkage, real density, porosity, heat and mass transfer coefficients during indirect solar drying of cocoa beans," Journal of the Saudi Society of Agricultural Sciences, vol. 18, pp. 72-82, 2019.
• [6] L. A. Ramallo and R. H. Mascheroni, "Quality evaluation of pineapple fruit during drying process," Food and Bioproducts Processing, vol. 90, pp. 275-283, 2012.
• [7] J. V. García-Pérez, J. A. Cárcel, E. Riera and A. Mulet, "Influence of the Applied Acoustic Energy on the Drying of Carrots and Lemon Peel," Drying Technology, vol. 27, pp. 281-287, 2009.
• [8] H.-H. Chen, C. E. Hernandez and T.-C. Huang, "A study of the drying effect on lemon slices using a closed-type solar dryer," Solar Energy, vol. 78, pp. 97-103, 2005.
• [9] M. Sadeghi, O. Mirzabeigi Kesbi and S. A. Mireei, "Mass transfer characteristics during convective, microwave and combined microwave–convective drying of lemon slices," Journal of the Science of Food and Agriculture, vol. 93, pp. 471-478, 2013.
• [10] J. Wang, C.-L. Law, P. K. Nema, J.-H. Zhao, Z.-L. Liu, L.-Z. Deng et al., "Pulsed vacuum drying enhances drying kinetics and quality of lemon slices," Journal of Food Engineering, vol. 224, pp. 129-138, 2018.
• [11] M. Torki-Harchegani, M. Ghasemi-Varnamkhasti, D. Ghanbarian, M. Sadeghi and M. Tohidi, "Dehydration characteristics and mathematical modelling of lemon slices drying undergoing oven treatment," Heat and Mass Transfer, vol. 52, pp. 281-289, 2016.
• [12] I. Dincer, "Moisture loss from wood products during drying—part 1: moisture diffusivities and moisture transfer coefficients," Energy Sources, vol. 20, pp. 67-75, 1998.
• [13] I. Dincer and S. Dost, "Determination of moisture diffusivities and moisture transfer coefficients for wooden slabs subject to drying," Wood Science and Technology, vol. 30, pp. 245-251, 1996.
• [14] A. Delpino-Rius, J. Eras, F. Vilaró, M. Á. Cubero, M. Balcells and R. Canela-Garayoa, "Characterisation of phenolic compounds in processed fibres from the juice industry," Food Chemistry, vol. 172, pp. 575-584, 2015.
• [15] S. Lagha-Benamrouche and K. Madani, "Phenolic contents and antioxidant activity of orange varieties (Citrus sinensis L. and Citrus aurantium L.) cultivated in Algeria: Peels and leaves," Industrial Crops and Products, vol. 50, pp. 723-730, 2013.
• [16] B. B. Li, B. Smith and M. M. Hossain, "Extraction of phenolics from citrus peels: I. Solvent extraction method," Separation and Purification Technology, vol. 48, pp. 182-188, 2006.
• [17] S. Jokic, J. Lukinac, D. Velic, M. Bilic, D. Magric and M. Planinic. (2020, May 20). Optimization of drying parametersand color changes of pretreated organic apple slices [Online]. Available: https://pdfs.semanticscholar.org/fb5c/cd1241836d093c7f5d19904801016ddc855a.pdf.
• [18] G. C. Bora, R. Pathak, M. Ahmadi, and P. Mistry, "Image processing analysis to track colour changes on apple and correlate to moisture content in drying stages," Food Quality and Safety, vol. 2, pp. 105-110,2018.
• [19] D. I. Onwude, N. Hashim, K. Abdan, R. Janius and G. N. Chen, "Combination of computer vision and backscattering imaging for predicting the moisture content and colour changes of sweet potato (Ipomoea batatas L.) during drying," Computers and Electronics in Agriculture, vol. 150, pp. 178-187, 2018.
• [20] K. Vijayarekha, "Machine vision application for food quality: A review," Research Journal of Applied Sciences, Engineering and Technology, vol. 4, pp. 5453-5458, 2012.
• [21] Kurutulmuş Elma- Özellikler ve Deney Metotları, Türk Standartlar Enstitüsü TS 3688, 2009.
• [22] W. Horwitz, "Official methods of analysis of the association of official analytical chemists," Arlington, Virginia, 1990, c. 17, s. 1-2.
• [23] H. İ. Variyenli, M. B. Özdemir, M. G. Özkaya, F. Kılıç and H. Kaçmaz, "Comparison performance of flat surface drying owen with performances performance of absorber surface," Gazi Journal of Engineering Science, vol. 1, pp. 305-324, 2015.
• [24] T. Brosnan and D. W. Sun, "Improving quality inspection of food products by computer vision - a review," Journal of Food Engineering, vol. 61, pp. 3-16, 2004.
• [25] D. Mery and F. Pedreschi, "Segmentation of colour food images using a robust algorithm," Journal of Food Engineering, vol. 66, pp. 353-360, 2005.
• [26] L. Fernandez, C. Castillero and J. M. Aguilera, "An application of image analysis to dehydration of apple discs," Journal of Food Engineering, vol. 67, pp. 185-193, 2005.
• [27] A. Yadollahinia and M. Jahangiri, "Shrinkage of potato slice during drying," Journal of Food Engineering, vol. 94, pp. 52-58, 2009.