diff --git a/tools/infer/predict_det.py b/tools/infer/predict_det.py
index 69db67db3588ec551b9e586ce439ddc96154b899..efda0e46cf37aec97b954fb829e8053573631825 100755
--- a/tools/infer/predict_det.py
+++ b/tools/infer/predict_det.py
@@ -174,7 +174,6 @@ if __name__ == "__main__":
         if img is None:
             logger.info("error in loading image:{}".format(image_file))
             continue
-        img = cv2.cvtColor(img, cv2.COLOR_BGR2RGB)
         dt_boxes, elapse = text_detector(img)
         if count > 0:
             total_time += elapse