Initialize ImageSlider value

app.py

@@ -162,6 +162,15 @@ def _prepare_input(image: Image.Image) -> Image.Image:
     return image.resize((TARGET_RESOLUTION, TARGET_RESOLUTION), Image.Resampling.BICUBIC)
 
 
+def _initial_slider_value() -> Tuple[Image.Image, Image.Image]:
+    if EXAMPLE_FILES:
+        with Image.open(EXAMPLE_FILES[0]) as image:
+            preview = _prepare_input(image)
+    else:
+        preview = Image.new("RGB", (TARGET_RESOLUTION, TARGET_RESOLUTION), "#f8fafc")
+    return preview, preview.copy()
+
+
 def _gpu_duration(*args, **kwargs) -> int:
     value = os.environ.get("ASASR_GPU_DURATION", "45")
     try:
@@ -276,6 +285,7 @@ with gr.Blocks(title="ASASR Super-Resolution") as demo:
         with gr.Column(scale=2, min_width=420):
             comparison_slider = ImageSlider(
                 label="Input LR | ASASR HR",
+                value=_initial_slider_value(),
                 type="pil",
                 height=560,
                 position=0.5,