Estimation Of The Total Acceptance Of Banana Fruit Using Digital Image Processing And Gaussian Process Regression Model During The Storage Period - Info and Reading Options

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<p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><a href="#_ftn1" title="" rel="nofollow"><span class="MsoFootnoteReference"><b><span style="font-size:1pt;line-height:95%;font-family:'Times New Roman', serif;color:#FFFFFF;"><span><span class="MsoFootnoteReference"><b><span style="font-size:1pt;line-height:107%;font-family:'Times New Roman', serif;color:#FFFFFF;">[1]</span></b></span></span></span></b></span></a><b><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;">Introduction: </span></b><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">The development of brown spots on banana peel has a notable effect on the texture, color and taste of this fruit. So that the appearance of these spots reduces the quality of the fruit and affect its sale market. In recent years, in order to evaluate the quality and classification of agricultural products, the various systems based on computer vision technology have been widely considered. These systems as the computer image analysis methods have been successful in measuring the visual quality of different products (Riyadi et al., 2007; Roseleena et al., 2011; Rodriguez-pulido et al. 2012). According to research by Probha and Kumar (2015), the extracted color properties from the banana image were more effective than other features in identifying the different stages of the banana ripening. Also, Mendoza and Aguilera (2004) detected the different stages of banana ripening based on the color, texture parameters and the distribution of brown spots on banana peel using image processing technique with a precision of 98%. Nadafzadeh et al. (2018) designed a non-linear mathematical model using the Genetic Programming (GP) to predicting and evaluating the activity of polyphenol oxidase enzymes (PPO) and peroxides (POD) during the browning process of the banana peel; using the extracted parameters from image as inputs of proposed model, the correlation coefficients to predicting of PPO and POD enzymes were obtained 0.98 and 0.97, respectively.</span></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">The aim of this study was to investigate the changes of color, dimensions and chemical parameters of several banana fruit groups (different in terms of appearance) as well as their marketability (the total acceptance of fruit) by Gaussian regression model (GPR) during the storage period. Therefore, using the proposed method in this research, the required product can be available according to the consumer demand.</span></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;"> </span></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span class="tlid-translation"><b><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">Materials and Methods: </span></b></span><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">In this study, one hundred banana samples were prepared from a market on the first day of the experiments. Samples were different in</span></span><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en"> </span><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">terms of shape and size, and were classified into 5 different groups. Group A had small size and curvature; B group compared to Group A had more curvature; the curvature of the samples in the group C was high, and in terms of size were medium. While the size of the bananas in group D was large, they had a small curvature.</span></span><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en"> </span><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">Also, the features of the group E were similar to the group D, but the curvature was greater in this group (group E). All of the samples were kept at the ambient temperature (25° C) away from the direct light for 7 days. During the days of experiments (days 0, 2, 4 and 6), five samples were examined from each group: after taking images</span></span><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en"> </span><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">of samples under the constant light conditions, and performing of manual measurements, they were subjected to destructive tests (laboratory tests) and sensory tests. After the images acquisition of samples, the preprocessing operations such as image enhancement, noise removal by the area opening, and the implementation of the image segmentation process using the method of Otsu adaptive thresholding <a rel="nofollow">were conducted (Gonzalez et al., 2004). Finally, 11 color parameters (R, G, B, L, a, b, h, s, v, C, H) and 4 dimensional characteristics (diameter, curvature radius, long and small length) were extracted from each image. In the laboratory method, the TSS value was measured by a digital refractometer, and amount of pH and acidity were also measured by a fruit juice analysis titrator. Eventually, in order to investigate the changes </a>of measured parameters, statistical analysis was performed in a randomized complete block design by SAS 9.3 software at a significance level of 5% using Duncan's multiple comparison test. </span></span><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en"></span></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span class="tlid-translation"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en"> </span></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span class="tlid-translation"><b><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;" lang="en" xml:lang="en">Results and discussion: </span></b></span><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;">Gradually along with the appearance of dark spots on the banana peel, many of the qualitative parameters such as the color, dimensions and chemical features were changed during the storage period. According to results of the Duncan's multiple range test, the values of color coordinates R, G, B, L, b, h, v, C, and H gradually reduced, and the values of these parameters were significant in all the experiments days (p&lt;0.05). The parameter S also had a decreasing trend during the storage period, and the changes of this parameter was significant in the first days of the experiments compared to the ending days; during this period, the color parameter a increased significantly. Due to the changes of the banana fruit texture, the amount of the curvature radius, the small and large lengths, total soluble solids, pH and total titration acidity gradually decreased. Based on the results of the statistical analysis, there were no significant differences between dimensional parameters measured by non-destructive method and manual measurement (p&gt;0.05). It is worth noting that in this study, the spent time to conduct the manual measurements of the dimensional parameters of a banana sample was 510 seconds, while all of these measurements were performed using a digital image processing method at 1.015 seconds. Therefore, it can be said that when the number of samples is high, using of the proposed method is also very cost-effective in terms of time, and it has high accuracy during the measurement. In the sensory evaluation, the results show that the best and most acceptable group of bananas were groups C, D and E, which had long size and low curvature; these groups of bananas had delicious texture, desirable flavor and low levels of brown spots on their peel. In the following, the non-destructive parameters were used to the development of Gaussian regression model (GPR), and finally, it was shown that the quality of banana fruit as well as its marketability (the total acceptance of fruit) are predictable during the storage period by GPR with a correlation coefficient of 0.91, MAPE (20.47), RMSE (0.43), SRE (0.71) and RAV (0.20</span><span dir="rtl"></span><span dir="rtl"></span><span dir="rtl" style="font-size:12pt;line-height:95%;font-family:'B Mitra';" lang="fa" xml:lang="fa"><span dir="rtl"></span><span dir="rtl"></span>).</span><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;"></span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;">The appearance quality of the banana fruit is very effective in its acceptability for customer. In this research, the image processing technique as a non-destructive method was used to extract a set of color (R, G, B, L, a, b, h, s, v, C and H) and morphological properties (diameter, curvature radius, long length and small length) from banana image in order to evaluate its quality during storage. According to the results of Duncan's statistical analysis at the probability level of 5% and Pearson correlation results, the most suitable parameters were chosen to apply in Gaussian regression model. The results showed that the image processing technique is capable to evaluating the changes of color and dimensional parameters of banana fruit, and also the proposed model have a satisfactory performance (R2=0.91) in predicting the overall acceptance parameter of the banana.</span></p> <p class="MsoNormal" style="margin-bottom:0.0001pt;text-align:justify;text-indent:14.2pt;line-height:95%;"><span style="font-size:10pt;line-height:95%;font-family:'Times New Roman', serif;"> </span></p><div><hr width="33%" size="1" align="left" /> <div> <p class="MsoFootnoteText" style="text-align:justify;"><a href="#_ftnref1" title="" rel="nofollow"></a><span dir="rtl"></span><span style="font-family:'Times New Roman', serif;"></span></p> </div> </div>

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