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Multimodal remote sensing image matching is still a challenging task, and its matching performance will highly influence the subsequent applications, such as image fusion, image mosaic and change detection. To tackle this problem, we propose a radiometric and rotational invariant descriptor (RRID) using the monogenic signal for multimodal image matching. First of all, a multiscale feature asymmetry measurement is proposed to obtain more reliable detected points, in which the multiscale feature asymmetry can be computed from the intermediate results from the monogenic signal; then a multiscale local phase orientation computation algorithm is designed for the main orientation assignment of each keypoint, in which the local phase orientation can also be provided by the monogenic signal construction; finally, a circular local window around each keypoint is extracted, a histogram of local phase orientations weighted by phase congruency is calculated for the log-polar feature description. RRID is compared with other state-of-the-art multimodal image matching methods on three publicly available datasets. Experimental results have demonstrated that our proposed method outperforms the compared methods in terms of precision, recall, and F1-measure criteria and also has achieved the lowest RMSEs. [ABSTRACT FROM AUTHOR]

The Achilles tendon and the bones around the foot and ankle are often exposed after trauma and infection because of the thinness of the soft tissue. Many surgeons consider the distally-based neurocutaneous flap as the first choice for reconstructing soft tissue defects around the ankle, as it provides robust axial perfusion for flaps and is easier to transpose than random pattern local flaps or free flaps. We report here a series of 23 cases of reconstruction of the foot and ankle using a distally-based sural neurocutaneous flap. This flap, which measured from 5 ×× 4 cm2 to 15 ×× 10 cm2, was transferred to cover defects in the soft tissues of the foot and ankle. The short saphenous veins were ligated in 12 cases and retained in the remaining 11 cases. All flaps survived, but two cases with retained short saphenous veins developed venous congestion, including one that progressed to distal necrosis. In conclusion, the distally-based sural neurocutaneous vascular flap provides a valuable tool for the repair of defects in tissues around the ankle. [ABSTRACT FROM AUTHOR]