Schematic representation of the architecture of the CNN used with input (three or one colour, 64 × 64 pixel image) on the left and output (binary classification of merger or non-merger) on the right. The sizes of the kernels (red) and layers are shown with the input layer having a depth of three for the SDSS (gri) and CANDELS (1.6 μm, 1.25 μm, and 814 nm) data and one for the KiDS (r-band) data.