Fix: model dependency + default sample

app.py

@@ -26,6 +26,8 @@ sample_images = {
     "Sample 1": os.path.join(os.getcwd(), "data/xai/sample1.jpeg"),
     "Sample 2":  os.path.join(os.getcwd(), "data/xai/sample2.jpg"),
 }
+default_sample_image = load_sample_image("Sample 1")
+
 def load_sample_image(sample_name):
     if sample_name in sample_images:
         try:
@@ -46,11 +48,11 @@ with gr.Blocks() as interface:
             label="Select a Sample Image",
             type="value",
         )
-        sample_display = gr.Image(label="Sample Image Preview", value=None)
+        sample_display = gr.Image(label="Sample Image Preview",  value=default_sample_image)
         sample_selection.change(fn=load_sample_image, inputs=sample_selection, outputs=sample_display)
 
     selected_models = gr.CheckboxGroup(
-        choices=["yolov3", "yolov8s"],
+        choices=["yolov5", "yolov8s"],
         value=["yolov5"],  # Default model
         label="Select Model(s)",
     )