如何在 Colab 中将 Inception V4 从 .ckpt 转换为 .pb？

Question

我正在使用 Coral 开发板和 Jetson T2 开发板。 为了向他们发送模型，模型必须具有扩展名 .pb

是否有模型已经具有 .pb 扩展名的链接？ 目前我正在使用这个链接： TF_slim

所有模型都有扩展名 .ckpt，仅此而已。 没有 .meta 或其他任何东西。 我不知道如何转换为 .pb。

我在 Colab 工作。 这是我的代码：

# Now let's download the pretrained model from tensorflow's model zoo.
!mkdir /content/pretrained_model
%cd /content/pretrained_model
!wget http://download.tensorflow.org/models/inception_v4_2016_09_09.tar.gz
!tar xvf inception_v4_2016_09_09.tar.gz


#Exporting the inference graph
!python /content/models/research/slim/export_inference_graph.py \
--alsologtostderr \
--model_name=inception_v4.ckpt \
--output_file=/content/pretrained_model/inception_v4_inf_graph.pb

这是我得到的错误：

Traceback (most recent call last):
  File "/content/models/research/slim/export_inference_graph.py", line 162, in <module>
    tf.app.run()
  File "/tensorflow-1.15.2/python3.6/tensorflow_core/python/platform/app.py", line 40, in run
    _run(main=main, argv=argv, flags_parser=_parse_flags_tolerate_undef)
  File "/usr/local/lib/python3.6/dist-packages/absl/app.py", line 299, in run
    _run_main(main, args)
  File "/usr/local/lib/python3.6/dist-packages/absl/app.py", line 250, in _run_main
    sys.exit(main(argv))
  File "/content/models/research/slim/export_inference_graph.py", line 128, in main
    FLAGS.dataset_dir)
  File "/content/models/research/slim/datasets/dataset_factory.py", line 59, in get_dataset
    reader)
  File "/content/models/research/slim/datasets/imagenet.py", line 187, in get_split
    labels_to_names = create_readable_names_for_imagenet_labels()
  File "/content/models/research/slim/datasets/imagenet.py", line 93, in create_readable_names_for_imagenet_labels
    filename, _ = urllib.request.urlretrieve(synset_url)
  File "/usr/lib/python3.6/urllib/request.py", line 248, in urlretrieve
    with contextlib.closing(urlopen(url, data)) as fp:
  File "/usr/lib/python3.6/urllib/request.py", line 223, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib/python3.6/urllib/request.py", line 532, in open
    response = meth(req, response)
  File "/usr/lib/python3.6/urllib/request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python3.6/urllib/request.py", line 564, in error
    result = self._call_chain(*args)
  File "/usr/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.6/urllib/request.py", line 756, in http_error_302
    return self.parent.open(new, timeout=req.timeout)
  File "/usr/lib/python3.6/urllib/request.py", line 532, in open
    response = meth(req, response)
  File "/usr/lib/python3.6/urllib/request.py", line 642, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python3.6/urllib/request.py", line 570, in error
    return self._call_chain(*args)
  File "/usr/lib/python3.6/urllib/request.py", line 504, in _call_chain
    result = func(*args)
  File "/usr/lib/python3.6/urllib/request.py", line 650, in http_error_default
    raise HTTPError(req.full_url, code, msg, hdrs, fp)
urllib.error.HTTPError: HTTP Error 404: Not Found

谢谢

Answer 1

tensorflow/models 中的这个 URL似乎有错误。 我提交了一个 PR tensorflow/models#9207 。

- base_url = 'https://raw.githubusercontent.com/tensorflow/models/master/research/inception/inception/data/'
+ base_url = 'https://raw.githubusercontent.com/tensorflow/models/master/research/slim/datasets'

进行此更改将修复 404 错误。

---

请参阅https://github.com/tensorflow/models/tree/master/research/slim#exporting-the-inference-graph 上的说明

导出推理图

保存包含模型架构的 GraphDef。

要将其与 slim 定义的模型名称一起使用，请运行：

 $ python export_inference_graph.py \\ --alsologtostderr \\ --model_name=inception_v3 \\ --output_file=/tmp/inception_v3_inf_graph.pb $ python export_inference_graph.py \\ --alsologtostderr \\ --model_name=mobilenet_v1 \\ --image_size=224 \\ --output_file=/tmp/mobilenet_v1_224.pb

冻结导出的图形 如果您想将结果模型与您自己的或预训练的检查点一起用作

模型，您可以运行 freeze_graph 来获得一个图形 def，其中使用以下方法将变量内联为常量：

 bazel build tensorflow/python/tools:freeze_graph bazel-bin/tensorflow/python/tools/freeze_graph \\ --input_graph=/tmp/inception_v3_inf_graph.pb \\ --input_checkpoint=/tmp/checkpoints/inception_v3.ckpt \\ --input_binary=true --output_graph=/tmp/frozen_inception_v3.pb \\ --output_node_names=InceptionV3/Predictions/Reshape_1