Case (1) building damage level ≥0 is regarded as a damaged area.
Most of the misclassification situations were those of the slight damage level or the serious damage level being misclassified as the moderate damage level, and the moderate damage level being misclassified as the slight damage level.
Three different damage levels are introduced to examine the damage level effect on strain ageing.
The raster images for each damage level were aggregated.
An observed damage level was exposed with the selected ECS.
In other words, the misclassification of the damage level only spanned one level, and there was only one block of serious damage misclassified as the slight damage level.
Table 3 Classification accuracy: damage level and ∆γ (HH, HV) threshold level Damage level ∆γ (HH, HV) threshold Khokana Sankhu Prod.
However, the identification accuracy of the blocks with the slight damage level and moderate damage level is generally improved, and the overall accuracy is improved.
Heavy structural damage (damage level ≥4) seems to be detected by this method.
Experimental results demonstrated that relative humidity (RH) conditions influence strongly the damage level and damage mechanisms.
The city block with the damage level between slight damage and serious damage was considered as moderate damage.
