######################################################################
# Generate
-def generate(size, alpha, alpha_bar, sigma, model):
+def generate(size, alpha, alpha_bar, sigma, model, train_mean, train_std):
+
with torch.no_grad():
+
x = torch.randn(size, device = device)
for t in range(T-1, -1, -1):
fig = plt.figure()
ax = fig.add_subplot(1, 1, 1)
+ # Nx1 -> histogram
if train_input.size(1) == 1:
- x = generate((10000, 1), alpha, alpha_bar, sigma, model)
+ x = generate((10000, 1), alpha, alpha_bar, sigma,
+ model, train_mean, train_std)
ax.set_xlim(-1.25, 1.25)
ax.spines.right.set_visible(False)
ax.legend(frameon = False, loc = 2)
+ # Nx2 -> scatter plot
elif train_input.size(1) == 2:
- x = generate((1000, 2), alpha, alpha_bar, sigma, model)
+ x = generate((1000, 2), alpha, alpha_bar, sigma,
+ model, train_mean, train_std)
ax.set_xlim(-1.5, 1.5)
ax.set_ylim(-1.5, 1.5)
plt.get_current_fig_manager().window.setGeometry(2, 2, 1024, 768)
plt.show()
+# NxCxHxW -> image
elif train_input.dim() == 4:
- x = generate((128,) + train_input.size()[1:], alpha, alpha_bar, sigma, model)
+ x = generate((128,) + train_input.size()[1:], alpha, alpha_bar, sigma,
+ model, train_mean, train_std)
x = 1 - x.clamp(min = 0, max = 255) / 255
torchvision.utils.save_image(x, f'diffusion_{args.data}.png', nrow = 16, pad_value = 0.8)