Sim-Radon-based shape descriptor for deformable pattern recognition

Abstract

It is a challenging but important task to design an abstract and robust shape descriptor for deformable shapes in a highly discriminative way. However, most of the existing low-level descriptors are designed using hand-crafted features and are sensitive to local variations and large deformations. To solve this problem, in this Letter, we propose a shape descriptor based on the Radon transform and SimNet for shape recognition. It effectively overcomes structural barriers, such as rigid or non-rigid transformations, irregular topologies between shape features, and similarity learning. Specifically, we use the Radon features of the objects as the input to the network and calculate the similarity using SimNet. Deformation of objects may affect Radon feature maps, and SimNet can overcome such effects to reduce the loss of information. Compared with SimNet, which consumes the original images as the input, our method shows higher performance.