Recognition of materials has proven to be a challenging problem due to the wide variation in appearance within and between categories. Many recent material recognition methods treat materials as yet another set of labels like objects. Materials are, however, fundamentally different from objects as they have no inherent shape or defined spatial extent. This makes local material recognition parti...

The length of SOAP vectors is determined by a radial basis cutoff nmax and an angular basis (spherical harmonic) cutoff lmax. We tuned the SOAP parameters to produce the best predictive results for GB energy using a grid search over radial cutoff values from 3.5 : 0.5 : 6.0 (from next-nearest neighbor shell up to fifth-nearest neighbors), lmax ∈ [8, 20], and nmax ∈ [8, 20]. The best performance...