Remote-Sensing Image Tile-Level Annotation Based on Discriminative Features and Expressive Visual Word Descriptors

Table 2

The PA value comparison between using different methods.

Methods	Water	Vegetation	Residential area	Farmland
Color features	0.967 0	0.909 1	0.288 1	0.916 5
Texture features	0.938 2	0.678 8	0.377 7	0.551 2
Spatial features	0.883 6	0.948 3	0.550 6	0.726 8
NOF + K-means	0.929 0	0.937 6	0.612 0	0.787 1
WOF + K-means	0.934 9	0.949 4	0.616 8	0.815 7
Our proposed method	0.939 4	0.947 0	0.664 1	0.911 2