Update api.py

api.py

@@ -11,7 +11,7 @@ import cv2
 import numpy as np
 import imagehash
 import uvicorn
-from fastapi import FastAPI, File, Form, UploadFile, HTTPException
+from fastapi import FastAPI, File, Form, UploadFile, HTTPException, BackgroundTasks
 from fastapi.middleware.cors import CORSMiddleware
 from PIL import Image, ImageOps
 from ultralytics import YOLO