56
Color-CLC
nColor feature of lines: color pair  (c1,c2)
nColor pair space:
nRGB (2563*2563)  Too big!
nDominant colors (20*20)
nFinding the color pairs:
nOne line ® Several color pairs
nConstructing Color-CLC:  use clustering
n
Figure 3 (color pair)
Figure 4 (dominant colors)
Figure 5 (color pair II)
Figure 7 (result)
Figure l-3 (backup)