utils.py

import numpy as np
import torch
from huggan.pytorch.lightweight_gan.lightweight_gan import LightweightGAN


def load_model(model_name="ceyda/butterfly_cropped_uniq1K_512", model_version=None):
    model = LightweightGAN.from_pretrained(model_name, version=model_version)
    model.eval()
    return model


def generate(model, batch_size=1):
    with torch.no_grad():
        ims = model.G(torch.randn(batch_size, model.latent_dim)
                      ).clamp_(0.0, 1.0) * 255
        ims = ims.permute(0, 2, 3, 1).detach().cpu().numpy().astype(np.uint8)
    return ims