fix deeptext mindir export fail

model_zoo/official/cv/deeptext/export.py

@@ -16,6 +16,7 @@
 import numpy as np
 
 import mindspore as ms
+import mindspore.common.dtype as mstype
 from mindspore import Tensor, load_checkpoint, load_param_into_net, export, context
 
 from src.Deeptext.deeptext_vgg16 import Deeptext_VGG16_Infer
@@ -40,6 +41,10 @@ if __name__ == '__main__':
 
     load_param_into_net(net, param_dict_new)
 
+    device_type = "Ascend" if context.get_context("device_target") == "Ascend" else "Others"
+    if device_type == "Ascend":
+        net.to_float(mstype.float16)
+
     img_data = Tensor(np.zeros([config.test_batch_size, 3, config.img_height, config.img_width]), ms.float32)
 
     export(net, img_data, file_name=config.file_name, file_format=config.file_format)