Physical Properties Measurements of Okra Fruits Using Image Processing to Predict of Visual Maturity Index

Abstract

The investigation on main dimensions using measure methods (Line and rectangle) by image processing of okra pods revealed the following. (1) The length, diameter, mass, volume, and density ranged from (2.63 to 5.50 cm), (1.43 to 2.11 cm), (2.12 to 9.72 g), (4.24 to 19.24 cm 3 ) and (0.17 to 0.66 g/cm 3 ), respectively of okra pods. (2) The relationship between the measure and image of the L/D ratio of okra pods has a high correlation (R² = 0.9678). So, it can be established the grades standard of okra, according to image process of the L/D ratio of pods. Therefore, the standard grading according to image processing as follows: the “very small” group included pods not more than 1.98 (<1.98) in L/D ratio; the “small” group included pods from 1.98 to 2.28 (1.98 to 2.28); the “medium” class included okra pods from 2.28 to 2.55 (2.28 to 2.55) in length; finally the “large” group included pods larger than 2.55 (> 2.55). (3) The difference percentage between color values, which measuring by line and rectangle pixel methods. The minimum values were of 9.09, 7.22 and 6.67 %, and for maximum values were about 1.69, 2.94, and okra the considering visual means as aMaturity index of okra