SSD Tensorflow:UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start

 

我们在运行SSD Tensorflow版本的时候，会出现以下问题，我运行的命令为：

DATASET_DIR=VOC2012/
OUTPUT_DIR=tfrecords
python tf_convert_data.py \
--dataset_name=pascalvoc \
--dataset_dir=${DATASET_DIR} \
--output_name=voc_2012_train \
--output_dir=${OUTPUT_DIR}
通过百度是搜不到github上面的issues上面的答案的，我这里把问题的解决方法写出来，希望帮助大家玩SSD。错误信息为：

Converting image 1/5138Traceback (most recent call last):
File "tf_convert_data.py", line 59, in <module>
tf.app.run()
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/platform/app.py", line 48, in run
_sys.exit(main(_sys.argv[:1] + flags_passthrough))
File "tf_convert_data.py", line 54, in main
pascalvoc_to_tfrecords.run(FLAGS.dataset_dir, FLAGS.output_dir, FLAGS.output_name)
File "/home/xyxt/Downloads/SSD-Tensorflow/datasets/pascalvoc_to_tfrecords.py", line 218, in run
_add_to_tfrecord(dataset_dir, img_name, tfrecord_writer)
File "/home/xyxt/Downloads/SSD-Tensorflow/datasets/pascalvoc_to_tfrecords.py", line 177, in _add_to_tfrecord
_process_image(dataset_dir, name)
File "/home/xyxt/Downloads/SSD-Tensorflow/datasets/pascalvoc_to_tfrecords.py", line 83, in _process_image
image_data = tf.gfile.FastGFile(filename, 'r').read()
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/lib/io/file_io.py", line 126, in read
pywrap_tensorflow.ReadFromStream(self._read_buf, length, status))
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/lib/io/file_io.py", line 94, in _prepare_value
return compat.as_str_any(val)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/util/compat.py", line 106, in as_str_any
return as_str(value)
File "/usr/local/lib/python3.5/dist-packages/tensorflow/python/util/compat.py", line 84, in as_text
return bytes_or_text.decode(encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte
解决办法为：

pascalvoc_to_tfrecords.py

image_data = tf.gfile.FastGFile(filename, 'r').read()

改成：

image_data = tf.gfile.FastGFile(filename, 'rb').read()

就可以了。

参考文献

[1].can't create dataset: 'utf-8' codec can't decode byte 0xff in position 0: invalid start byte . https://github.com/balancap/SSD-Tensorflow/issues/108