Table 3: Comparison of the encoding time (unit: second).

Category (num of tex)	6x6 block size	Ours
Photos (25)	17.6	26.9
Game textures (26)	44.6	74.0
GIS data (4)	2.0	3.3
Synthesized iamges (2)	0.4	0.8
Captured images (7)	104.3	115.0
Total (64)	169.0	220.0