Question

Turi Create中的guide for Object Detection不包括设置数据，包括如何附加“注释”类别。

我所做的是创建一个单独的annotations文件，如下所示：

{
  "1.jpg": {
    "type": "rectangle",
    "coordinates": {
      "height": 97,
      "width": 243,
      "x": 4224,
      "y": 1821
    },
    "label": "cw"
}

然后我使用load_images和此文件设置我的数据：

# Load images
data = tc.image_analysis.load_images('train', with_path=True)
# Open annotations file as dict
annotations = eval(open("annotations").read())
# Add annotations column to SFrame, using the annotations dict key with the same name as the file name
data["annotations"] = data["path"].apply(lambda path: bounds[os.path.split(path)[1]])

效果很好，如果我打印data，我会得到类似的结果：

+-------------------------------+---------------------------+
|              path             |           image           |
+-------------------------------+---------------------------+
| /Users/Andrew/Code/turi/cw... | Height: 3816 Width: 11056 |
| /Users/Andrew/Code/turi/cw... | Height: 3888 Width: 10672 |
| /Users/Andrew/Code/turi/cw... |  Height: 3656 Width: 9700 |
| /Users/Andrew/Code/turi/cw... |  Height: 3872 Width: 8280 |
+-------------------------------+---------------------------+
+-------------------------------+
|          annotations          |
+-------------------------------+
| {'type': 'rectangle', 'coo... |
| {'type': 'rectangle', 'coo... |
| {'type': 'rectangle', 'coo... |
| {'type': 'rectangle', 'coo... |
+-------------------------------+

我不知道为什么在控制台中将它分成2行 - 可能仅仅是为了调整尺寸。

然后我在对象检测指南中找到这一行，它打算可视化应用于数据的注释：

tc.object_detector.util.draw_bounding_boxes(data["image"], data["annotations"])

当我运行它时，我在控制台中收到此错误：

Traceback (most recent call last):
  File "app.py", line 62, in <module>
    load_data(bounds)
  File "app.py", line 23, in load_data
    tc.object_detector.util.draw_bounding_boxes(data["image"], data["annotations"])
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/toolkits/object_detector/util/_visualization.py", line 139, in draw_bounding_boxes
    .apply(draw_single_image))
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/data_structures/sframe.py", line 2463, in apply
    dryrun = [fn(row) for row in test_sf]
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/toolkits/object_detector/util/_visualization.py", line 124, in draw_single_image
    _annotate_image(pil_img, anns, confidence_threshold=confidence_threshold)
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/toolkits/object_detector/util/_visualization.py", line 49, in _annotate_image
    for ann in reversed(anns):
TypeError: argument to reversed() must be a sequence

另外，如果我发表评论，然后继续做：

model = tc.object_detector.create(data, feature="image", annotations="annotations")

我收到错误：

Traceback (most recent call last):
  File "app.py", line 65, in <module>
    learn()
  File "app.py", line 37, in learn
    model = tc.object_detector.create(data, feature="image", annotations="annotations")
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/toolkits/object_detector/object_detector.py", line 170, in create
    require_annotations=True)
  File "/Users/Andrew/turi/lib/python2.7/site-packages/turicreate/toolkits/object_detector/object_detector.py", line 66, in _raise_error_if_not_detection_sframe
    raise _ToolkitError("Annotations column must contain lists")
turicreate.toolkits._main.ToolkitError: Annotations column must contain lists

据推测，我正在将我的注释列错误地设置为它的期望值。

Answer 1

annotations列缺少开始和结束括号。如果你看一下教程中的可视化输出，你会看到每个注释的开头都有一个开括号（...结果可能是最后的一个括号）。

目前还不确定如何解决这个问题。但是当我得到解决方案时会尝试发布。

Answer 2

有点晚了，但是我最近遇到了这个问题，或者至少是相同的错误报告。当您得到类似的信息时：

turicreate.toolkits._main.ToolkitError: Annotations column must contain lists

尝试

annotations.column_types() or data.column_types()

您很可能会看到类似的东西

 str, image, str

而不是期望的

str, image, list

，问题将是一个字符串格式错误，以便Python分析器使用barfs。在我的情况下，缺陷只是每行右方括号后的多余空间。对其进行修复，然后重新运行column_types以验证列表是否已正确处理，然后继续进行下一个障碍！

在Turi Create中使用对象检测导致错误的注释

2 个答案: