3. Results and discussion
The photographs in Fig. 2 show the internal appearance of pineapples graded into three maturity levels and a set of marbled fruit. Photograph 1 represents the class A of greater than 50% translucent yellow, photograph 2 for class B having 25–50% translucent yellow, photograph 3 representing class C of less than 25%, while photograph 4 depicts a marbling defect.