fastdeploy服务化部署，部分图片传到服务后会报错module 'numpy' has no attribute 'astype'

• 【FastDeploy版本】：fastdeploy:1.0.4-cpu-only-21.10
• 【系统平台】: 官方docker

报错如下

0904 12:09:52.059001 1627 pb_stub.cc:402] Failed to process the request(s) for model 'det_postprocess_0', message: AttributeError: module 'numpy' has no attribute 'astype'

At:
  /usr/local/lib/python3.8/dist-packages/numpy/__init__.py(284): __getattr__
  /opt/tritonserver/FastDeploy/examples/vision/ocr/PP-OCR/serving/fastdeploy_serving/models/det_postprocess/1/model.py(197): execute

我根据报错尝试查看了一下这个det_postprocess/1/model.py的代码，execute方法里就两处用到了astype。其中有一行代码我看着很奇怪，尝试改了下（倒数第二行改为了倒数第一行）。改了之后就能正常识别之前会报错的那批图片了。这应该算是一个BUG吧，但是我不懂python不知道我改得对不对，希望大佬确认一下

                for index in range(len(image_list)):
                    if cls_labels[index] == 1 and cls_scores[
                            index] > self.cls_threshold:
                        image_list[index] = cv2.rotate(
                            image_list[index].astype(np.float32), 1)
                        #image_list[index] = np.astype(np.uint8)
			image_list[index] = image_list[index].astype(np.uint8)

Open det_postprocess/1/model.py and inspect execute around line 197, where the failing module-level astype call is shown. Compare the two astype usages, then reproduce with the affected images and verify that the OCR service processes them without the NumPy AttributeError.