 A new pan-sharpening method using convolutional neural networks is proposed, which adapts a simple three-layer architecture for super-resolution and includes several maps of non-linear radiometric indices to improve performance without increasing complexity. Experiments on three representative datasets show the method to provide very promising results, largely competitive with the current state of the art in terms of both full reference and no-reference metrics and also at a visual inspection. This article was authored by Giuseppe Massi, Davide Cotzilino, Luisa Vertoliva, and others.