2016-07-23 42 views
3

我試圖使用_convert_to_example()函數的輕微變型,build_imagenet_data.py啓build_imagenet_data.py類型錯誤:「RGB」的類型是<class 'str'>,但預期的一個:(<類的字節'>,)

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 

我得到的色彩空間變量相關聯的錯誤:

TypeError: 'RGB' has type class 'str', but expected one of: (class 'bytes',)

如果我註釋掉圖像/色彩空間的功能,我得到的圖像/格式相同的錯誤。同樣對於圖像/文件名。如果我評論這三個功能,功能似乎按預期運行。我究竟做錯了什麼?

回答

3

這聽起來像是Python 2/3不兼容問題。您可以在前面加上b的字符串文字明確創建colorspaceimage_formatbytes對象,如下所示:

colorspace = b'RGB' 
# ... 
image_format = b'JPEG' 
+2

謝謝並確認。 py3.4提到了這個問題,但使用py2.7不存在。此外,除了將b預設爲字符串文字的建議之外,encode()方法適用於字符串變量。 – RobR

2

我注意到一些額外的變化。

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() 
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