## 4 Experimental Results and Analysis
### Experimental Datasets  
Two groups of datasets are used to evaluate our model. The first group includes the whole Botswana (BOT) dataset, the whole Kennedy Space Center (KSC) dataset, and the truncated Indian Pines (truncated IND PINE) dataset where the labeled ground blocks are relatively discrete and distant from each other. Different from the first group, the labeled samples in the second group are less discrete and always appear in bulk. The whole Indian Pines (IND PINE) dataset, the whole Salinas (SAL) dataset, and the whole Pavia University (PAV) dataset are included.  
The BOT dataset was collected by the Hyperion sensor on EO-1 satellite over the Okavango Delta, Botswana in May 2001. The 242 spectral bands of the Hyperion image are ranging from 357 to 2576 nm with a spatial resolution of 30 m. Total number of 145 bands in BOT are left after removing some un-calibrated and noisy bands. The KSC, IND PINE and SAL dataset were separately gathered by the AVIRIS sensor over the Kennedy Space Center on March 23, 1996, over the Indian Pines test site in North-western Indian in 1992 and over the Salinas Valley, California, with 224 spectral reflectance bands in the wavelength ranging from 400 to 2500 nm. The un-calibrated bands and noisy bands covering the water absorption feature are removed and only 200 bands remain. The PAV dataset was acquired by the reflective optics system imaging spectrometer (ROSIS) sensor over Pavia University with 103 spectral bands and a spatial resolution of 1.3 m. Before analysis, some of the samples which contain no information are discarded.  
More information of these six datasets can be found in [29], and all datasets can be downloaded from [28]. The ground truth of every dataset is shown in Figures 3 and 4. The sample size of each class in each dataset is shown in Tables 1 and 2.  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Class**} & \multicolumn{2}{c}{**Indiana Pine**} & \multicolumn{2}{c}{**Salinas Scene**} & \multicolumn{2}{c}{**Pavia University**} \\
**No.** & \multicolumn{2}{c}{**(IND PINE)**} & \multicolumn{2}{c}{**(SAL)**} & \multicolumn{2}{c}{**(PAV)**} \\ \cline{2-7}  & **Class Name** & **Sample Size** & **Class Name** & **Sample Size** & **Class Name** & **Sample Size** \\ \hline
5 & Grass-pasture & 483 & Fallow\_smooth & 2678 & Bitumen & 808 \\
6 & Grass-trees & 730 & Stubble & 3959 & Tiles & 1260 \\
7 & Grass-pasture-mowed & 28 & Celery & 3579 & Shadows & 476 \\
8 & Hay-windrowed & 478 & Grapes\_untrained & 11271 & Meadows & 824 \\
9 & Oats & 20 & Soil\_vinyard\_develop & 6203 & & \\
10 & Soybean-notill & 972 & Corn\_senesed\_green\_weeds & 3278 & & \\
11 & Soybean-mintill & 2455 & Lettuce\_romaine\_4 wk & 1068 & & \\
12 & Soybean-clean & 593 & Lettuce\_romaine\_5 wk & 1927 & & \\
13 & Wheat & 205 & Lettuce\_romaine\_6 wk & 916 & & \\
14 & Woods & 1265 & & & & \\
15 & Buildings-Grass-Trees-Drives & 386 & & & & \\
16 & Stone-Steel-Towers & 93 & & & & \\ \hline \hline \end{tabular}
\end{table}
Table 2: _Cont_.  
Figure 4: Ground truth of datasets in Group II. (**a**) Ground truth of the truncated Salinas (SAL) image. (**b**) Ground truth of the IND PINE image. (**c**) Ground truth of the Pavia University (PAV) image.  
Figure 3: Ground truth of datasets in Group I. (**a**) Ground truth of the truncated Indian Pines (IND PINE) image. (**b**) Ground truth of the Kennedy Space Center (KSC) image. (**c**) Ground truth of the Botswana (BOT) image.