Inception build_imagenet_data.py TypeError：'RGB'具有 <class 'str'>，但需要以下类型之一：(<class 'by

Question

我试图在build_imagenet_data.py中使用_convert_to_example（）函数的一个小变体：

def _convert_to_example(filename, image_buffer, label, bboxes, height, width):
  xmin = []
  ymin = []
  xmax = []
  ymax = []
  for b in bboxes:
    assert len(b) == 4
    # pylint: disable=expression-not-assigned
    [l.append(point) for l, point in zip([xmin, ymin, xmax, ymax], b)]
    # pylint: enable=expression-not-assigned
    colorspace = 'RGB'
    channels = 3
    image_format = 'JPEG'
    example = tf.train.Example(features=tf.train.Features(feature={
      'image/height': _int64_feature(height),
      'image/width': _int64_feature(width),
      'image/colorspace': _bytes_feature(colorspace),
      'image/channels': _int64_feature(channels),
      'image/class/label': _int64_feature(label),
      'image/object/bbox/xmin': _float_feature(xmin),
      'image/object/bbox/xmax': _float_feature(xmax),
      'image/object/bbox/ymin': _float_feature(ymin),
      'image/object/bbox/ymax': _float_feature(ymax),
      'image/object/bbox/label': _int64_feature(label),
      'image/format': _bytes_feature(image_format),
      'image/filename': _bytes_feature(os.path.basename(filename)),
      'image/encoded': _bytes_feature(image_buffer)}))
  return example

我得到一个与颜色空间变量相关的错误：

TypeError:"RGB"的类型为"str"，但应为以下类型之一：（class"bytes"，）

如果我注释掉图像/颜色空间功能，我会得到相同的图像/格式错误。图像/文件名也是如此。如果我注释掉这三个特性，函数似乎会按预期运行。我做错了什么？

Answer 1

这听起来像是Python 2/3不兼容的问题。通过在字符串文字前面加上b，可以显式地将colorspace和image_format创建为bytes对象，如下所示：

colorspace = b'RGB'
# ...
image_format = b'JPEG'

Answer 2

我注意到了一些额外的更改。

o     #shuffled_index = range(len(filenames))
o     shuffled_index = list(range(len(filenames)))
o     #for i in xrange(len(spacing) - 1):
o     for i in range(len(spacing) - 1):
o         'image/class/text': _bytes_feature(text.encode()),
o         'image/filename': _bytes_feature(os.path.basename(filename.encode())),
o     colorspace = 'RGB'.encode()
o     channels = 3
o     image_format = 'JPEG'.encode()