Update prompt text and default values for model parameters

- Updated the prompt text in the app to ask users to describe what they see.
- Changed the default value for max length slider from 250 to 500.
- Changed the default value for text decoding method radio button from "Nucleus sampling" to "Beam search".
- Changed the default value for top p slider from 0.2 to 0.9.
- Changed the default value for beam size slider from 5 to 10.
- Changed the default value for length penalty slider from 1 to 0.4.
- Changed the default value for repetition penalty slider from 1 to 5.

app.py

@@ -60,7 +60,7 @@ with gr.Blocks(theme=theme, analytics_enabled=False,css=css) as demo:
     with gr.Row():
         with gr.Column(scale=3):
             image_input = gr.Image(type="pil")
-            prompt_textbox = gr.Textbox(label="Prompt:", placeholder="prompt", value="Please describe this image.", lines=2)
+            prompt_textbox = gr.Textbox(label="Prompt:", placeholder="prompt", value="Please describe what you see.", lines=2)
             output = gr.Textbox(label="Output")
             submit = gr.Button("Run", variant="primary")
 
@@ -77,25 +77,25 @@ with gr.Blocks(theme=theme, analytics_enabled=False,css=css) as demo:
             max_len = gr.Slider(
                 minimum=10,
                 maximum=500,
-                value=250,
+                value=500,
                 step=5,
-                interactive=True,
+                interactive=False,
                 label="Max Length",
             )
         
             sampling = gr.Radio(
                 choices=["Beam search", "Nucleus sampling"],
-                value="Nucleus sampling",
+                value="Beam search",
                 label="Text Decoding Method",
-                interactive=True,
+                interactive=False,
             )
         
             top_p = gr.Slider(
                 minimum=0.5,
                 maximum=1.0,
-                value=0.2,
+                value=0.9,
                 step=0.1,
-                interactive=True,
+                interactive=False,
                 label="Top p",
             )
         
@@ -104,25 +104,25 @@ with gr.Blocks(theme=theme, analytics_enabled=False,css=css) as demo:
                 maximum=10,
                 value=5,
                 step=1,
-                interactive=True,
+                interactive=False,
                 label="Beam Size",
             )
         
             len_penalty = gr.Slider(
                 minimum=-1,
                 maximum=2,
-                value=1,
+                value=0.4,
                 step=0.2,
-                interactive=True,
+                interactive=False,
                 label="Length Penalty",
             )
         
             repetition_penalty = gr.Slider(
                 minimum=-1,
                 maximum=3,
-                value=1,
+                value=5,
                 step=0.2,
-                interactive=True,
+                interactive=False,
                 label="Repetition Penalty",
             )
     gr.Examples(