Fig. 1. Optical-SAR image matching scheme based on phase congruence

Fig. 2. Phase congruence transformation maps of optical and SAR images. (a) Optical image; (b) phase congruency map of optical image; (c) SAR image; (d) phase congruency map of SAR image

Fig. 3. Comparison of Harris operator calculated by original graph and M_ψ graph. (a) Original image; (b) M_ψgraph; (c) calculating Harris operator with original image; (d) calculating Harris operator with M_ψ graph

Fig. 4. MPIM generation process

Fig. 5. Feature descriptor test data based on MPIM. (a) Optical image of the group 1; (a) SAR image of the group 1; (c) optical image of the group 2; (d) SAR image of the group 2

Fig. 6. Experimental results of feature descriptor based on MPIM. (a) Group 1; (b) group 2

Fig. 7. Optical-SAR image matching results. (a) Group 1; (b) group 2; (c) group 3; (d) group 4