Slower implementation of "The incremental online k-means clustering algorithm and its application to color quantization"

1. Batch K-Means (Forgy, 1965 and Lloyd, 1982)
2. Incremental Batch K-Means (Linde et al., 1980)
3. Online K-Means (MacQueen, 1967)
4. Incremental Online K-Means (Abernathy & Celebi, 2022)

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Color Quantization Visualization:

Original Image (24-bit)	K=256 (8-bit)	K=128 (7-bit)	K=64 (6-bit)	K=32 (5-bit)	K=16 (4-bit)	K=8 (3-bit)
Fish	MSE: 33.03	MSE: 52.85	MSE: 85.57	MSE: 141.75	MSE: 261.97	MSE: 523.64
Pills	MSE: 41.29	MSE: 66.26	MSE: 111.54	MSE: 200.18	MSE: 363.38	MSE: 710.83
Kodim23	MSE: 44.49	MSE: 75.15	MSE: 131.98	MSE: 241.26	MSE: 485.24	MSE: 1017.66
Kodim05	MSE: 38.18	MSE: 63.79	MSE: 110.80	MSE: 202.64	MSE: 389.18	MSE: 689.97

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Cluster Visualization:

OKM on fish.ppm (3-bit)

IOKM on fish.ppm (3-bit)