Clustermap correlation for the 15 input features. The correlation matrix displays the numerical correlation coefficients in each cell, with a color scale ranging from −1 to 1, where 0 indicates no correlation (white), −1 indicates linear anticorrelation (blue), and 1 indicates linear correlation (red). The dendrogram reveals two main feature clusters: cluster A, composed of color indices, and cluster B, composed of morpho-parameters.