diff --git a/services/paddle_services/paddle_detection/detector.py b/services/paddle_services/paddle_detection/detector.py
index a121682..5be9f03 100644
--- a/services/paddle_services/paddle_detection/detector.py
+++ b/services/paddle_services/paddle_detection/detector.py
@@ -4,7 +4,6 @@ from collections import defaultdict
 import cv2
 import numpy as np
 
-from util import image_util
 from . import PADDLE_DET, MODEL_DIR
 from .deploy.third_engine.onnx.infer import PredictConfig
 from .deploy.third_engine.onnx.preprocess import Compose
@@ -37,11 +36,25 @@ def detect_image(img_path):
     return predict_image(infer_config, PADDLE_DET, img_path)
 
 
+def capture(image, rectangle):
+    x1, y1, x2, y2 = rectangle
+    height, width = image.shape[:2]
+    if x1 < 0:
+        x1 = 0
+    if y1 < 0:
+        y1 = 0
+    if x2 > width:
+        x2 = width
+    if y2 > height:
+        y2 = height
+    return image[int(y1):int(y2), int(x1):int(x2)]
+
+
 def get_book_areas(img_path):
     detect_result = detect_image(img_path)
     book_areas = detect_result[73]
     result = []
     image = cv2.imread(img_path)
     for book_area in book_areas:
-        result.append(image_util.capture(image, book_area['box']))
+        result.append(capture(image, book_area['box']))
     return result