*4.1. Dataset Description*

(1) The Salinas dataset: This dataset is composed of the urban and rural scene. The HS image was collected by the Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) over Salinas Valley, California [12]. The collected HS image is characterized by 224 bands in the spectral range of 0.4–2.5 μm. The water absorption and noise corrupted bands are removed, and 204 bands are used for experimentation. In the experiments, the *P* image covers the visible spectral range with the spatial resolution of 20 m. The dimensions of the HS and *P* images are 40 × 40 and 200 × 200, respectively.

(2) The Pavia University dataset: This dataset was acquired by the Reflective Optics System Imaging (ROSIS) over Pavia, Italy [12]. ROSIS provides the dataset which covers the spectral range of 0.4–0.9 μm, and the dataset is characterized by 115 bands. After the water absorption and the noise corrupted bands are removed, 103 bands are used for experimentation. The *P* image has a spatial resolution of 1.3 m in the visible spectral range. The size of the HS and *P* images in the experiment are 40 × 40 and 200 × 200, respectively.

(3) The Washington DC dataset: This dataset was collected by the Spectral Information Technology Application Center of Virginia over the Washington DC Mall. The dataset consists of 210 bands in the spectral range of 0.4–2.4 μm. Some bands have been removed since the atmosphere is opaque, and 191 bands are used for the experiment. In the experiments, the *P* image has a spatial resolution of 0.8 m in the visible spectral range. The dimensions of the HS and *P* images are 40 × 40 and 200 × 200, respectively.

(4) The Hyperion dataset: The EO-I spacecraft which is operated by NASA carries two instruments: Hyperion and Advanced Land Imager (ALI) [12]. Hyperion provides the HS image which is characterized by 242 bands in the spectral range of 0.4–2.5 μm. The spatial resolution of the HS image is 30 m. ALI instrument is capable of providing the *P* image which covers the spectral range of 0.48–0.69 μm with the spatial resolution of 10 m.
