Sapphire Color Grading Method based on color Space Feature Automatic Clustering Algorithm

Sapphire color classification is an important link in the gemstone industry, which is directly related to the market value of sapphire and consumers' purchase choice. Traditional color classification mainly depends on the naked eye observation and experience judgment of experts. Although this method can meet the needs to a certain extent, it has some problems such as strong subjectivity, low efficiency and poor consistency. With the development of computer vision technology, automatic clustering algorithm based on color space features to classify sapphire color has become a new solution.