Developing an Automatic Color Determination Procedure for the Quality Assessment of Mangos (Mangifera indica) Using a CCD Camera and Color Standards

Autor: Jan Fritsche, Khanitta Ratprakhon, Werner Neubauer, Sascha Rohn, Katharina Riehn
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Foods
Volume 9
Issue 11
Foods, Vol 9, Iss 1709, p 1709 (2020)
ISSN: 2304-8158
DOI: 10.3390/foods9111709
Popis: Color is one of the key sensory characteristics in the evaluation of the quality of mangos (Mangifera indica) especially with regard to determining the optimal level of ripeness. However, an objective color determination of entire fruits can be a challenging task. Conventional evaluation methods such as colorimetric or spectrophotometric procedures are primarily limited to a homogenous distribution of the color. Accordingly, a direct assessment of the mango quality with regard to color requires more pronounced color determination procedures. In this study, the color of the peel and the pulp of the mango cultivars &ldquo
Nam Dokmai&rdquo
&ldquo
Mahachanok&rdquo
and &ldquo
Kent&rdquo
was evaluated and categorized into various levels of ripeness using a charge-coupled device (CCD) camera in combination with a computer vision system and color standards. The color evaluation process is based on a transformation of the RGB (red, green, and blue) color space values into the HSI (hue, saturation, and intensity) color system and the Natural Color Standard (NCS). The results showed that for pulp color codes, 0560-Y20R and 0560-Y40R can be used as appropriate indicators for the ripeness of the cultivars &ldquo
The peels of these two mango cultivars present two distinct colors (1050-Y40R and 1060-Y40R), which can be used to determine the fruit maturity during the post-ripening process. However, in the case of the cultivar &ldquo
peel color detection was not an applicable approach for determining ripeness
thus, the determination of the pulp color with the color code 0550-Y20R gave promising results.
Databáze: OpenAIRE