Resumo

CASTRO CAMACHO, Jennifer Katiusca; CERQUERA PENA, Néstor Enrique  e  GUTIERREZ GUZMAN, Nelson. EXOCARP COLOR DETERMINATION AS INDICATOR OF PHYSIOLOGICAL DEVELOPMENT AND MATURITY IN PEAR GUAVA (PSIDIUM GUAJAVA CV. PEAR GUAVA), USING TECHNIQUES OF DIGITAL IMAGE PROCESSING. Rev.EIA.Esc.Ing.Antioq [online]. 2013, n.19, pp.79-89. ISSN 1794-1237.

The colorimetric coordinates analysis of digital images in samples pear guava fruits (Psidium guajava cv. Pear guava) was performed for three times of harvest: traditional harvesting at 120 days after flowering (T1), early harvesting at 112 days after flowering (T2) and, early harvesting at 110 days after flowering (T3), the three group of samples were stored at environmental conditions at a temperature of 26 °C and 58% of relative humidity and under refrigeration at 7.5 °C and 85% relative humidity. For color determination two color spaces were used: RGB and CIE-L*a*b*, each of these spaces describes the color of the skin using three components that allow the comparison ofits evolution during each step of postharvest. The results showed a typical evolution from deep green, freshly harvested, to light green yellowish colors. The found coordinates allow the reproduction of the colors of the evolution of ripening in printing devices configured in RGB coordinates. From the physicochemical parameters assessed, the respiration rate of the fruitis the most correlated with the change of color during the post-harvest stage.

Palavras-chave : digital image processing; color spaces; respiration rate of the pear guava.

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