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Pricing: Free community edition limited to 5000 images and an enterprise version.It also offers the possibility to integrate a human-in-the-loop by importing model predictions and seeing the consensus between the labelers and the model. Labelbox is another great web-based platform that launched in early 2018 and ever since then has been constantly updating and improving its functionalities. The interface allows for very precise work and supports customizable hotkey shortcuts but performance has recently been slow at times, which can be pretty frustrating if the platform takes a lot of time to switch between images and record annotations. Their tech support team is always available in the case of problems. A couple of things missing are time statistics, as well as quality control mechanisms. They also have a Data Transformation Language and a Python Notebooks option for managing the data which come in handy a lot.
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Project management: The platform offers tons of options for project management on various levels (teams, workspaces, datasets) and annotator management (labeling jobs, permissions, statistics).
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In addition, there is an option to do data transformation directly on the platform. Output is in JSON files for each image or PNG masks and the platform also allows you to upload formats such as Cityscapes and COCO. Another very useful feature is the option to add image and object tags and to order figures in layers. Also includes the possibility to draw holes in polygons, which has been incredibly valuable. Functionalities: A great array of tools, including dots, lines, boxes, polygons, and a bitmap brush for semantic segmentation (we haven’t found their smart tool too useful though).Price: Free community edition and enterprise pricing for the self-hosted version.Supervisely is an awesome web-based platform that offers an advanced annotation interface but also covers the entire process of computer vision training, including a deep learning models library that can be directly trained, tested, and improved within the platform. They support some hotkey shortcuts and the application is very lightweight in general. Project management: Nothing too advanced in terms of dataset management and users but their interface is one of the most efficient and precise ones for polygon annotation because it allows you to see the line of the polygon and nothing else.The annotations can be downloaded as one JSON file containing all annotations, or as one CSV file, and can be uploaded afterwards if there is a need to review them. Also has the option of adding object and image attributes/tags. Functionalities: Offers a lot more tools, including dots, lines, polygons, circles and ellipses (only platform in this list supporting circles and ellipses!).In its most recent version, it also offers a wide variety of video labeling tools.
Best annotation software Offline#
It is available as an online interface and can also be used offline as an HTML file. VGG is an open-source tool that, just like LabelImg, can do an amazing job for straightforward tasks that do not require project management.