Table 3 Total number and percentage of pixel points of sandstone walls with different weathering degrees
From: Weathering assessment approach for building sandstone using hyperspectral imaging technique
Weathering degree | Total number of pixel points | Percentage (%) |
|---|---|---|
Unweathered (UW) | 1,432,826 | 34.19 |
Slightly weathered (SW) | 999,120 | 23.84 |
Moderately weathered (MW) | 757,570 | 18.08 |
Highly weathered (HW) | 1,000,692 | 23.88 |