Powers of layers for image-to-image translation
Authors: Hugo Touvron, Matthijs Douze, Matthieu Cord, Herve Jegou
Abstract: We propose a simple architecture to address unpaired image-to-image  translation tasks: style or class transfer, denoising, deblurring, deblocking, etc. 
We start from an image autoencoder architecture with fixed weights. 
For each task we learn a residual block operating in the latent space, which is iteratively called until the target domain is reached. 
A specific training schedule is required to alleviate the exponentiation effect of the iterations. 
At test time, it offers several advantages: the number of weight parameters is limited and the compositional design allows one to modulate the strength of the transformation with the number of iterations. 
This is useful, for instance, when the type or amount of noise to suppress is not known in advance.  
Experimentally, we show that the performance of our model is comparable or better than CycleGAN and Nice-GAN with fewer parameters.