An Effective Color Quantization Method Using Octree-Based Self-Organizing Maps

Table 1

Information on test images.

Image	Resolution	Number of colors	Color difference
(a) Lenna	512 × 512	148,279	97.60
(b) Parrots	768 × 512	72,079	126.36
(c) Mona Lisa	1280 × 1920	125,240	97.14
(d) House	1280 × 1024	363,724	136.87
(e) Mandrill	512 × 512	230,427	118.48
(f) Venus	1848 × 1173	396,799	131.67
(g) Bedroom	1280 × 1024	454,673	136.26
(h) Scream	999 × 1362	189,162	108.71
(i) Old man	321 × 481	33,411	107.84
(j) Dragonfly	481 × 321	41,117	72.24