K-means clustering on unique colors

reduced_palette.py

class UniqueKMeansReducedPalette(KMeansReducedPalette):
    def __init__(self, num_colors):
        super().__init__(num_colors)

    def fit(self, image):
        image_cpy = image.copy()
        pixels = self._preprocess(image_cpy)
        super().fit(np.unique(pixels, axis=0))