Update

1 files changed, 2 insertions, 9 deletions

diff --git a/pipelines/stable_diffusion/vlpn_stable_diffusion.py b/pipelines/stable_diffusion/vlpn_stable_diffusion.py
index a6b31d8..f02dd72 100644
--- a/pipelines/stable_diffusion/vlpn_stable_diffusion.py
+++ b/pipelines/stable_diffusion/vlpn_stable_diffusion.py
@@ -307,17 +307,10 @@ class VlpnStableDiffusion(DiffusionPipeline):
         return timesteps, num_inference_steps - t_start
 
     def prepare_image(self, batch_size, width, height, dtype, device, generator=None):
-        max = 0.4
-        offset = max * (2 * torch.rand(
-            (batch_size, 1, 1, 1),
-            dtype=dtype,
-            device=device,
-            generator=generator
-        ) - 1)
         noise = perlin_noise(
-            batch_size, width, height, res=3, octaves=3, generator=generator, dtype=dtype, device=device
+            batch_size, width, height, res=1, octaves=4, generator=generator, dtype=dtype, device=device
         ).expand(batch_size, 3, width, height)
-        return ((1 + max) * noise + max * offset).clamp(-1, 1)
+        return (1.4 * noise).clamp(-1, 1)
 
     def prepare_latents(self, init_image, timestep, batch_size, dtype, device, generator=None):
         init_image = init_image.to(device=device, dtype=dtype)