fix issue in image2canny

app.py

@@ -218,7 +218,7 @@ class image2canny:
         image = Image.open(inputs)
         image = np.array(image)
 
-        image = cv2.Canny(image, low_threshold, high_threshold)
+        image = cv2.Canny(image, self.low_thresh, self.high_thresh)
         image = image[:, :, None]
         image = np.concatenate([image, image, image], axis=2)
         canny_image = Image.fromarray(image)
@@ -420,7 +420,7 @@ class ConversationBot:
 
 bot = ConversationBot()
 with gr.Blocks(css="#chatbot .overflow-y-auto{height:500px}") as demo:
-    gr.Markdown("# Visual ChatGPT  <p> Visual ChatGPT combines visual foundation models and ChatGPT to send,receive and process images during chatting.This demo currently supports text, image captioning, image generation, and visual question answering</p>")
+    gr.Markdown("# Visual ChatGPT  <p> Visual ChatGPT combines visual foundation models and ChatGPT to send,receive and process images during chatting</p><br>.<p>This demo currently supports text, image captioning, image generation, and visual question answering</p>")
     openai_api_key_input = gr.Textbox(type = "password", label = "Enter your OpenAI API key here")    
     chatbot = gr.Chatbot(elem_id="chatbot", label="Visual ChatGPT")
     state = gr.State([])