Update app.py

app.py

@@ -27,7 +27,7 @@ def get_segmenter():
     """Initialize segmentation class."""
     try:
         segmenter = SegmentImage(line_model_path=LINE_MODEL_PATH, 
-                            device='0', 
+                            device='cuda:0', 
                             line_iou=0.3,
                             region_iou=0.5,
                             line_overlap=0.5,