Fig. 1. Initial posture of ground wire detection

Fig. 2. Image of ground wire. (a) New wire; (b) old wire

Fig. 3. Flow chart of ground wire detection algorithm

Fig. 4. Flow chart of homomorphic filter

Fig. 5. Adaptive homomorphic filtering of ground wire image

Fig. 6. Feature extraction of LBP histogram

Fig. 7. Schematic of image block

Fig. 8. SVM classification of ground wire patches

Fig. 9. RANSAC fitting

Fig. 10. Part of training samples of ground wire

Fig. 11. Artificial parameter of ground wire

Fig. 12. Classification accuracy of different parameter (C,γ) values

Fig. 13. Influence of parameter (P,R) on ground wire detection accuracy