Starch Index Derived from Stained Images for Rapid Quantification of Starch in Apples
2012
Gil, B.I., Anyang University, Anyang, Republic of Korea | Cho, Y.J., Korea Food Research Institute, Seongnam, Republic of Korea
Starch content in apples is one of important quality parameters to evaluate their maturity or ripeness. This study aimed to develop a rapid and simple method for the quantification of starch content by means of computer vision. In advance, three types, or type Ⅰ, type Ⅱ and type Ⅲ, of starch indices to indicate starch content in apples stained with KI/I₂ solution were proposed. When the proposed starch indices were correlated with total starch content and amylose content, the type Ⅰ of starch index indicated total starch content of three types of starch indices. The type Ⅰ index was defined as the ratio of the area with pure blue to the total area in an Hue-Lightness-Saturation (HLS) image for apple stained with KI/I₂. When the total starch content was particularly expressed on a dry basis, the highest correlation coefficient (0.811) was observed.
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