Lightweight Insulator Defect Detection Based on Multiscale Feature Fusion

Table 1. Comparison of C2f experiments at different positions
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Table 1. Comparison of C2f experiments at different positions
Model P /% R /% P_mA /% Params /M GFOLPs
YOLOv8n 95.4 91.5 94.5 3.01 8.1
+C2f-RE1 95.9 91.7 95.4 2.64 7.1
+C2f-RE2 95.3 91.3 94.4 2.66 7.4
+C2f-RE3 94.8 90.3 94.3 2.29 6.5

Table 2. Effect of $λ_{r a t i o}$ on model performance

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Table 2. Effect of $λ_{r a t i o}$ on model performance

Model	IoU	P /%	R /%	P_mA /%
YOLOv8n+C2f-RE+FDPN+LSDECD	CIoU^［18］	96.2	94.1	96.7
	WIoU^［20］	96.4	94.6	96.9
	Inner-WIoU（1.05）	96.6	93.2	96.2
	Inner-WIoU（1.075）	96.6	93.9	96.7
	Inner-WIoU（1.1）	95.5	94.0	96.9
	Inner-WIoU（1.125）	97.0	94.3	97.1
	Inner-WIoU（1.15）	95.2	92.7	96.0

Table 3. Ablation experiment

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Table 3. Ablation experiment

Model	C2f-RE	FDPN	LSDECD	Inner-WIoU	P_mA /%	Params /M	GFOLPs	Detection frame rate /（frame/s）	Size /MB
a	×	×	×	×	94.5	3.01	8.1	115	6.3
b	√	×	×	×	95.4	2.64	7.1	80	5.6
c	×	√	×	×	95.8	2.74	8.4	97	5.7
d	×	×	√	×	95.2	2.36	6.5	107	5.3
e	×	×	×	√	95.6	3.01	8.1	120	6.3
f	√	√	×	×	96.2	2.37	7.4	93	5.0
g	√	√	√	×	96.7	1.94	6.2	80	4.5
h	√	√	√	√	97.1	1.94	6.2	85	4.5

Table 4. Comparative experiment of different algorithms

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Table 4. Comparative experiment of different algorithms

Model	P /%	R /%	P_mA /%	Params /M	GFLOPs	Detection frame rate /（frame/s）
YOLOv3-tiny^［23］	91.0	80.8	87.7	8.67	13.0	58.5
YOLOv5n^［24］	92.2	86.9	90.1	7.02	16.0	77.0
YOLO7-tiny^［25］	92.1	87.0	91.2	6.02	13.2	81.3
YOLO8n^［26］	95.4	91.5	94.5	3.01	8.1	109.4
RT-DETR-l^［27］	96.8	94.5	96.9	28.45	105.2	37.2
Faster R-CNN（ResNet50+FPN）^［28］	‒	‒	96.0	41.36	134.5	21.0
IF-DETR^［29］	96.5	94.9	97.3	39.30	90.1	35.0
YOLOv8-GSC^［30］	95.6	94.6	96.8	7.90	21.5	75.0
Ours	96.7	95.5	97.1	1.94	6.2	85.0

Table 5. Comparative experiments simulating different environments
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Table 5. Comparative experiments simulating different environments
Image type YOLOv8n Ours
P /% R /% P_mA /% P /% R /% P_mA /%
Normal 95.4 91.5 94.5 96.7 95.5 97.1
Low-light 95.1 91.3 94.3 96.4 92.4 96.3
Foggy 95.4 89.1 93.8 94.3 91.2 95.2
Rainy 92.6 86.5 91.5 93.8 88.6 92.5

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Tieqiang Sun, Zhaozhi Hong, Chao Song, Pengcheng Xiao. Lightweight Insulator Defect Detection Based on Multiscale Feature Fusion[J]. Laser & Optoelectronics Progress, 2025, 62(6): 0612008

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