Update app.py

app.py

@@ -11,5 +11,13 @@ with gr.Blocks() as app:
                 msg_box = gr.Textbox(label="System Message")
             with gr.Column():
                 out_im = gr.Image(label="Watermarked Image")
+    with gr.Tab("Detect Watermark"):
+        with gr.Row():
+            with gr.Column():
+                det_im = gr.Image(label="Watermarked Image",type="filepath")
+                det_btn = gr.Button("Detect")
+            with gr.Column():
+                det_msg = gr.Textbox(label="Detected Watermark",lines=6, max_lines=50)
     mark_btn.click(utils.encode,[inp_im,inp_mark],[out_im,msg_box])
+    det_btn.click(utils.decode,[det_im],det_msg)
 app.launch()