Create app.py

app.py

@@ -0,0 +1,107 @@
+# 2022aug31
+
+#import gradio as gr
+
+#def greet(name):
+#    return "Hello " + name + "!!"
+
+#iface = gr.Interface(fn=greet, inputs="text", outputs="text")
+#iface.launch()
+
+import subprocess
+from pathlib import Path
+
+import einops
+import gradio as gr
+import numpy as np
+import torch
+from huggingface_hub import hf_hub_download
+from PIL import Image
+from torch import nn
+from torchvision.utils import save_image
+
+
+class Generator(nn.Module):
+    def __init__(self, nc=4, nz=100, ngf=64):
+        super(Generator, self).__init__()
+        self.network = nn.Sequential(
+            nn.ConvTranspose2d(nz, ngf * 4, 3, 1, 0, bias=False),
+            nn.BatchNorm2d(ngf * 4),
+            nn.ReLU(True),
+            nn.ConvTranspose2d(ngf * 4, ngf * 2, 3, 2, 1, bias=False),
+            nn.BatchNorm2d(ngf * 2),
+            nn.ReLU(True),
+            nn.ConvTranspose2d(ngf * 2, ngf, 4, 2, 0, bias=False),
+            nn.BatchNorm2d(ngf),
+            nn.ReLU(True),
+            nn.ConvTranspose2d(ngf, nc, 4, 2, 1, bias=False),
+            nn.Tanh(),
+        )
+
+    def forward(self, input):
+        output = self.network(input)
+        return output
+
+
+model = Generator()
+weights_path = hf_hub_download('nateraw/cryptopunks-gan', 'generator.pth')
+model.load_state_dict(torch.load(weights_path, map_location=torch.device('cpu')))
+
+
+@torch.no_grad()
+def interpolate(save_dir='./lerp/', frames=100, rows=8, cols=8):
+    save_dir = Path(save_dir)
+    save_dir.mkdir(exist_ok=True, parents=True)
+
+    z1 = torch.randn(rows * cols, 100, 1, 1)
+    z2 = torch.randn(rows * cols, 100, 1, 1)
+
+    zs = []
+    for i in range(frames):
+        alpha = i / frames
+        z = (1 - alpha) * z1 + alpha * z2
+        zs.append(z)
+
+    zs += zs[::-1]  # also go in reverse order to complete loop
+
+    for i, z in enumerate(zs):
+        imgs = model(z)
+
+        # normalize
+        imgs = (imgs + 1) / 2
+
+        imgs = (imgs.permute(0, 2, 3, 1).cpu().numpy() * 255).astype(np.uint8)
+
+        # create grid
+        imgs = einops.rearrange(imgs, "(b1 b2) h w c -> (b1 h) (b2 w) c", b1=rows, b2=cols)
+
+        Image.fromarray(imgs).save(save_dir / f"{i:03}.png")
+
+    subprocess.call(f"convert -dispose previous -delay 10 -loop 0 {save_dir}/*.png out.gif".split())
+
+
+def predict(choice, seed):
+    torch.manual_seed(seed)
+
+    if choice == 'interpolation':
+        interpolate()
+        return 'out.gif'
+    else:
+        z = torch.randn(64, 100, 1, 1)
+        punks = model(z)
+        save_image(punks, "punks.png", normalize=True)
+        return 'punks.png'
+
+
+gr.Interface(
+    predict,
+    inputs=[
+        gr.inputs.Dropdown(['image', 'interpolation'], label='Output Type'),
+        gr.inputs.Slider(label='Seed', minimum=0, maximum=1000, default=42),
+    ],
+    outputs="image",
+    title="Cryptopunks GAN",
+    description="These CryptoPunks do not exist. You have the choice of either generating random punks, or a gif showing the interpolation between two random punk grids.",
+    article="<p style='text-align: center'><a href='https://arxiv.org/pdf/1511.06434.pdf'>Unsupervised Representation Learning with Deep Convolutional Generative Adversarial Networks</a> | <a href='https://github.com/teddykoker/cryptopunks-gan'>Github Repo</a></p>",
+    examples=[["interpolation", 123], ["interpolation", 42], ["image", 456], ["image", 42]],
+).launch(cache_examples=True)