Table 9.

Computational complexity of the compared models. The training time (in minutes) refers to data sets composed of images of the size 300 × 200 pixels. Our proposed approach is the 3-Layer DDCAE.

Model	Number of parameters	Training time [min]
Shallow Dense	108 M	145
Shallow DCAE	28 k	5
2-Layer DDCAE	426 k	54
3-Layer DDCAE	753 k	96
4-Layer DDCAE	2 M	216
AlexNet	58 M	223
GoogLeNet	6 M	258

M stands for million of parameters, k for thousands.