Call rescale_output_resolution before early return (#2897)

* Call rescale_output_resolution before early return

Co-authored-by: Chung Min Kim <chungmin99@gmail.com>

nerfstudio/models/splatfacto.py

@@ -747,10 +747,14 @@ class SplatfactoModel(Model):
             tile_bounds,
         )  # type: ignore
 
+        # rescale the camera back to original dimensions before returning
+        camera.rescale_output_resolution(camera_downscale)
+
         if (self.radii).sum() == 0:
-            rgb = background.repeat(int(camera.height.item()), int(camera.width.item()), 1)
+            rgb = background.repeat(H, W, 1)
             depth = background.new_ones(*rgb.shape[:2], 1) * 10
             accumulation = background.new_zeros(*rgb.shape[:2], 1)
+
             return {"rgb": rgb, "depth": depth, "accumulation": accumulation, "background": background}
 
         # Important to allow xys grads to populate properly
@@ -766,8 +770,6 @@ class SplatfactoModel(Model):
         else:
             rgbs = torch.sigmoid(colors_crop[:, 0, :])
 
-        # rescale the camera back to original dimensions
-        camera.rescale_output_resolution(camera_downscale)
         assert (num_tiles_hit > 0).any()  # type: ignore
 
         # apply the compensation of screen space blurring to gaussians