Fixed GPU issue

app.py

@@ -126,7 +126,7 @@ def detectv8(img,model,device,iou_threshold=0.45,confidence_threshold=0.25):
     fps_inference = 1/(time.time()-start)
     
     if torch.cuda.is_available():
-        boxes= results[0].boxes.cpu().detach().numpy()
+        boxes= results[0].boxes.cpu().numpy()
     else:
         boxes=results[0].boxes.numpy()
     for bbox in boxes: