DCNN	Deep Convolutional Neural Network
TDDM	Two-level Defect Detection Model
UHF	Ultra-high Frequency
FDR	frequency Domain Reflectometry
SNR	Signal-noise-ratio
TLD	Transmission Line Detection
NMS	Non-maximum Suppression
SLIC	Simple Linear Iterative Clustering
KDE	Kernel Density Estimation
mAP	Mean Aaverage precision
mAR	Mean Aaverage Recall
mRN	Mean Running Time
SSA	Superpixel Segmentation Algorithm
TP	True Positive
FP	False Positive
FN	False Negative