Digital Photometric Determination Of Papaya Essay
Digital Photometric Determination of the Degree of Maturity and Ripening of Some Papaya (Carica papaya L.) Hybrids Tolerant to Papaya Ringspot Virus
John Michael O. Cue1,*, Pablito Magdalita2, Edralina P. Serrano3 and Ernesto J. del Rosario1, **
1Institute of Chemistry, College of Arts and Sciences, 2Institute of Plant Breeding and 3Postharvest Horticulture Training and Research Center, Crop Science Cluster, College of Agriculture, University of the Philippines Los Baños, Laguna
*Authors for correspondence; e-mail: jmcue89@gmail.com*, ejdros@yahoo.com**
ABSTRACT
Fruits of three transgenic papaya hybrids tolerant to papaya ring spot virus were harvested in their full green color in order to assess skin color and some fruit physico-chemical
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The digital images of the potassium permanganate solutions were captured. These images were analyzed for their RGB components and will be converted to %L (Luminance), %a and %b. The %L (Luminance), %a and %b were each plotted against the concentration of the potassium permanganate solutions. The camera setting used in the image with the highest linearity was used in the course of the experiment.
Digital Photometric Data Gathering and Analysis
A papaya sample was placed in the light box and pictures were taken in each of the four sides by rotating the papaya in a clockwise direction. Ten papaya fruits served as references for the whole samples and were not destroyed until the last day (12th day) of the analysis. This method was also used to quantitate the conventional color fan for visual assessment of fruit maturity.
Analytical Methods of Physicochemical
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From the R, G, B values and visual characteristics of the reference papaya samples, stages of maturity of the papaya were determined (classified based on its corresponding RGB values). The means of each of the chemical parameters of the classified papaya samples were plotted against the means of the classified R, G and B color values to determine any correlation between a chemical attribute and a color value. From the derived relationship, combined color functions (binary and ternary) were formulated to determine the degree of the maturity of the
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