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annotation tool for object detection

asked 2012-10-22 08:37:14 -0500

mrgloom gravatar image

Is there some annotation tool that I can use for mark objects on images and then use this croped object images to train classifers?

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answered 2012-10-23 02:18:54 -0500

Siegfried gravatar image

Hi, you can try "Sloth" for image labeling. It is easy to use and you can define your own labels.

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answered 2015-01-29 06:58:28 -0500

updated 2018-01-21 20:28:54 -0500

you can use annotation.cpp

A PR has been added for both 2.4 and master branch to get a universal OpenCV based annotation tool included in the repository.

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answered 2018-01-21 19:43:18 -0500

casainfinita gravatar image

Try Labelbox (

image description

Labelbox is a cloud based tool to easily label data.

Labelbox makes it really easy to do basic image classification or segmentation tasks. Simply upload a CSV file pointing to the location of your data and choose an image classification or segmentation labeling template to get started.

In addition, It supports any kind of data such as text, images, maps, videos and even point clouds or medical DICOM. One can create a custom labeling interface with HTML and javascript and can be as simple as 30 lines of code. You can see their template code here:

Additional feature includes project management, team management and performance metrics.

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answered 2012-10-22 18:45:28 -0500

John gravatar image

Of course it'll vary based on your use case, but you can check out:

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answered 2017-06-20 08:04:39 -0500

Guanta gravatar image

If it's related to documents, then Transkribus is quite good:

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answered 2017-06-19 11:43:41 -0500

updated 2018-08-24 08:00:45 -0500

If you are using Mac OS X, you can use RectLabel.

An image annotation tool to label images for bounding box object detection and segmentation.

Key features:

  • Drawing bounding box, polygon, and cubic bezier
  • Export index color mask image and separated mask images
  • 1-click buttons make your labeling work faster
  • Customize the label dialog to combine with attributes
  • Settings for objects, attributes, hotkeys, and labeling fast
  • Layer order for overlapped boxes
  • Quick zoom to existing boxes
  • Support the PASCAL VOC format
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Asked: 2012-10-22 08:37:14 -0500

Seen: 8,488 times

Last updated: Aug 24 '18