Update app.py

app.py

@@ -229,8 +229,8 @@ class image2canny:
 class canny2image:
     def __init__(self, device):
         print("Initialize the canny2image model.")
-        low_threshold = 100
-        high_threshold = 200
+        self.low_threshold = 100
+        self.high_threshold = 200
 
         # Models
         controlnet = ControlNetModel.from_pretrained("lllyasviel/sd-controlnet-canny", torch_dtype=torch.float16)
@@ -252,7 +252,7 @@ class canny2image:
     def get_canny_filter(self,image):
         if not isinstance(image, np.ndarray):
             image = np.array(image) 
-        image = cv2.Canny(image, low_threshold, high_threshold)
+        image = cv2.Canny(image, self.low_threshold, self.high_threshold)
         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> 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.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([])