Official Implementation for "Only a Matter of Style: Age Transformation Using a Style-Based Regression Model" (SIGGRAPH 2021) https://arxiv.org/abs/2102.02754
The latent masks simply refer to the 18 input layers of StyleGAN. To better understand the meaning of the different layers you can refer to the original StyleGAN2 paper.
There are 17 latent masks in the code. Could you please refer any document from where I could read them in details?