The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
1200 
3.5 Statistical Inspections 
In his study, an HH polarized L band PALSAR, an HH 
polarized C band RADARSAT-1 image and a three band 
SPOT-2 XS were used for image fusion. The quality assessment 
analyses were evaluated for multi sensor data. In order to 
evaluate the improved spectral quality of the image fusion 
techniques, the original SPOT XS image was compared with 
the 8 resulting fused images. IHS, PCA, HPF, DCW techniques 
were used for the fusion of each RADARSAT-SPOT and 
PALSAR-SPOT images. All fused images compared 
statistically to SPOT XS using Bias, CC, DIV, SDD, UIQI 
statistical analysis derived from fused images (Table 2 and 
Table 3). 
performance. On the contrary DWT gives the better results for 
the RADARSAT-SPOT fused images. 
Among the all fused images, statistical analyses show that IHS 
technique gives the worst results for both RADARSAT and 
PALSAR images (Figure 3). 
RADARSAT-SPOT 
Band 1 Band 2 Band 3 
□ HPF □ PCA ■ IHS »DWT 
■ tt>F»PCAalH5aCWT 
Palsar 
Bias**» 
nrv % 
SDD % 
CO 
UIQI 
11PF B1 
0.51 
10.38 
1.08 
0.886 
0,884 
B2 
0.72 
9.88 
1.66 
0.902 
0,900 
B3 
0.73 
12.16 
3.08 
0.933 
0,931 
PCA B1 
0.04 
19.39 
2.07 
0.735 
0.730 
B2 
0.12 
28.81 
4.76 
0.611 
0,603 
B3 
0.82 
48.12 
13.71 
0.449 
0,425 
IHS B1 
20.74 
-524.63 
-30.32 
0.199 
0,133 
B2 
28.93 
-457.72 
44.29 
0.310 
0,210 
B3 
22.19 
-155.63 
-29.35 
0.644 
0.561 
DWT B1 
0.11 
19.17 
2.04 
0.777 
0,772 
U2 
-0.88 
27.87 
4.94 
0.761 
0,750 
B3 
-9.13 
59.92 
17.98 
0.616 
0.554 
Table 2.Statistical results for PALSAR fused images 
Radarsat 
Bias % 
DIV % 
SDD % 
CC 
UIQI 
HPF B1 
0.50 
7.60 
0.79 
0.868 
0,867 
B2 
0.70 
6.94 
1.16 
0.884 
0,883 
B3 
0.66 
9.32 
2.34 
0.915 
0,913 
PCA B1 
0.03 
19.25 
2.05 
0.796 
0,791 
B2 
0.09 
21.95 
3.82 
0.714 
0,708 
B3 
0.71 
27.58 
7.30 
0.647 
0,638 
IHS B1 
6.84 
581.66 
-32.57 
0.308 
0,205 
B2 
8.39 
-522.62 
-49.02 
0.458 
0,315 
B3 
1.84 
-198.07 
-35.61 
0.774 
0,671 
DWT B1 
-0.07 
4.02 
0.41 
0.897 
0,896 
B2 
0.12 
2.31 
0.38 
0.915 
0,914 
B3 
0.60 
-2.10 
-0.51 
0.938 
0,937 
Table 3.Statistical results for RADARSAT fused images 
Figure 3. Graphics of statistical analysis 
A spectral analysis was done for agricultural areas using a 
transect (Figure 4 and Figure 5). For the agricultural areas the 
best results have been gained using HPF for the fusion of 
PALSAR and SPOT XS (Figure 5 and Figure 6). 
Figure 4. Transect on SPOT XS 
Figure 5. Spectral analysis of SPOT XS 
As seen from the tables HPF and DWT methods show better 
results in both PALSAR fused and RADARSAT-1 fused 
images. Statistical results show that the fusion results of 
PALSAR-SPOT using the HPF method gives the best