TF-lite 模型测试因运行时错误而失败 [英] TF-lite model test fails with run-time Error
问题描述
我为 MNIST 分类创建了一个 TF-lite 模型(我使用的是 TF 1.12.0 并在 Google Colab 上运行它)并且我想使用 TensorFlow Lite Python 解释器对其进行测试,如
I have created a TF-lite model for MNIST classification (I am using TF 1.12.0 and running this on Google Colab) and I want to test it using TensorFlow Lite Python interpreter as given in
但是当我尝试调用解释器时出现此错误 -
But I am getting this error when I try to invoke the interpreter -
RuntimeError Traceback (most recent call last)
<ipython-input-138-7d35ed1dfe14> in <module>()
----> 1 interpreter.invoke()
/usr/local/lib/python3.6/dist-
packages/tensorflow/contrib/lite/python/interpreter.py in invoke(self)
251 ValueError: When the underlying interpreter fails raise
ValueError.
252 """
--> 253 self._ensure_safe()
254 self._interpreter.Invoke()
255
/usr/local/lib/python3.6/dist-
packages/tensorflow/contrib/lite/python/interpreter.py in
_ensure_safe(self)
97 in the interpreter in the form of a numpy array or slice. Be sure
to
98 only hold the function returned from tensor() if you are using
raw
---> 99 data access.""")
101 def _get_tensor_details(self, tensor_index):
RuntimeError: There is at least 1 reference to internal data
in the interpreter in the form of a numpy array or slice. Be sure to
only hold the function returned from tensor() if you are using raw
data access.
这是代码 -
import numpy as np
# Load TFLite model and allocate tensors.
interpreter =
tf.contrib.lite.Interpreter(model_path="mnist/mnist_custom.tflite")
interpreter.allocate_tensors()
# Get input and output tensors.
input_details = interpreter.get_input_details()
output_details = interpreter.get_output_details()
input_details
[{'dtype': numpy.float32,'索引':3,'name': 'conv2d_1_input',量化":(0.0, 0),'形状':数组([ 1, 28, 28, 1], dtype=int32)}]
[{'dtype': numpy.float32, 'index': 3, 'name': 'conv2d_1_input', 'quantization': (0.0, 0), 'shape': array([ 1, 28, 28, 1], dtype=int32)}]
test_images[0].shape
(28, 28, 1)
(28, 28, 1)
input_data = np.expand_dims(test_images[0], axis=0)
input_data.shape
(1, 28, 28, 1)
(1, 28, 28, 1)
interpreter.set_tensor(input_details[0]['index'], input_data)
interpreter.invoke()
问题是我不明白这条消息的含义以及如何处理.
The problem is I do not understand what this message means and what to do about it.
推荐答案
tf.convert_to_tensor
和 interpreter.set_tensor
帮我完成了工作
tf.convert_to_tensor
and interpreter.set_tensor
did the job for me
tensor_index = interpreter.get_input_details()[0]['index']
input_tensor_z= tf.convert_to_tensor(z, np.float32)
interpreter.set_tensor(tensor_index, input_tensor_z)
我创建了一个 end2end 示例,从训练 Keras 模型开始,在 TensorFlow Lite 上为其提供服务 这里
I've created an end2end example starting from training a Keras model to serve it on TensorFlow Lite here
我也在 这个线程
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