about generate_indices in code

[Gideon1998]

Hi, I'm interested in this work. But I don’t know what is the use of generate_indices for spa_mask.

[LongguangWang]

Hi @Gideon1998, generate_indices() aims to produce the coordinates of "important" pixels marked by the spatial mask. With these coordinates, we can perform sparse convolution to compute the output at only these sparse locations.