Fig. 5: Field regions targeted by CNN.
From: Learning the dynamics of metamaterials from diffracted waves with convolutional neural networks

Average change of CNN estimations for each material parameter when a 3 × 3 pixel mask moves and occludes the scattered fields (logarithmic scale). Higher changes indicate regions targeted by the CNN. The area inside the dotted rectangles is the specular projection of the material sample onto the a reflection and b transmission planes.