utils.py

import numpy as numpy
import torch
from huggan.pytorch.lightweight_gan.lightweight_gan import LightweightGAN 
# Modelo que genera gans, en este caso, nos ayuda a generar imagenes de mariposas


# Cargar modelo
def carga_modelo(model_name = "ceyda/butterfly_cropped_uniq1K_512", model_version = None):
    gan = LightweightGAN.from_pretrained(model_name, version = model_version, use_auth_token=None)
    gan.eval()
    return gan


# Ajustar el modelo para generar imagenes

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