added visualization code snippet and example

README.md

@@ -67,6 +67,43 @@ Each `{scene_name}.tar.gz` file contains the following structure when extracted:
     ├── ...
 ```
 
+## Example Visualization
+![Example Visualization](example.png)
+```
+import matplotlib.pyplot as plt
+import numpy as np
+import pandas as pd
+from PIL import Image
+
+# load example data
+data_train = "data/train/
+image_pairs = pd.read_csv(join(data_train, "image_pairs.csv"), header=None)
+id, scene_name, recon_num, floor_plan_path, image_path = image_pairs.iloc[0]
+
+plan = Image.open(join("visuals", scene_name, floor_plan_path))
+photo = Image.open(join("visuals", scene_name, image_path))
+corr_path = join(data_train, "correspondences", "0", f"{id:06d}.npy")
+plan_corr, photo_corr = np.load(corr_path)
+
+
+# plotting
+fig, axes = plt.subplots(1, 2, figsize=(12, 6))
+fig.suptitle(f"Scene: {scene_name}", fontsize=16)
+
+axes[0].imshow(plan)
+axes[0].set_title("Floor Plan")
+axes[0].scatter(plan_corr_unscaled[:, 0], plan_corr_unscaled[:, 1], c="r", s=1)
+axes[0].axis('off')
+
+axes[1].imshow(photo)
+axes[1].set_title("Photo")
+axes[1].scatter(photo_corr[:, 0], photo_corr[:, 1], c="r", s=1)
+axes[1].axis('off')
+
+plt.tight_layout()
+plt.show()
+```
+
 ## Citation
 If you use data from C3, please cite with the following:
 ```
@@ -77,5 +114,5 @@ If you use data from C3, please cite with the following:
       booktitle={Advances in Neural Information Processing Systems},
       volume={37},
       year={2025}
-    }
+}
 ```