Once we have a project setup, let’s label some data! Go to your new project and select the ‘Data’ tab in the project. This will take you to the data overview. To see and/or start labelling a data asset, click the ‘Label’ button. This will take you to the label editor view.
Navigating the label editor
Here we can play the data unit directly, navigate it frame by frame, or by a chosen frame skip interval that you can configure at the bottom of the navigation pane.
We can also see the label options in the left-hand panel reflecting the ontology you set up in the project creation. Instantiate the labels directly through the hotkeys that appear on the right of the labels.
In general, you can review all hotkeys by clicking on the keyboard icon in the upper panel.
Instantiating new objects
Now let’s start labelling. Click on the object or classification you want to add on the left panel(or use the appropriate hotkey) to instantiate a new object or classification of that type. The drawing cursor will appear, and you can now draw the object directly on the frame.
It is important to note that for objects, instantiating from ‘Create new labels’ creates a new unique object of that type.
Keeping track of objects
To draw a label for an object that already exists, find the object under the ‘Instances’ panel (first expand the labels by pressing the plus button) and click on it (or use the appropriate hotkey). This will allow you to draw consistent tracks of objects (i.e. the same object across a range of frames will retain he same ID).
To propagate an object from frame A to frame B you have many options: draw the object from clicking it in 'Video labels' (or using the appropriate hotkey), copy the object in frame A and paste it in frame B and adjust it accordingly, or use our automated features.
To delete object labels you have multiple options. Delete an object or multiple objects directly from the frame by selecting them and pressing 'Del' on your keyboard. You can also delete an object across multiple frames by going to the object in the 'Video labels' pane, selecting the vertical ellipsis button on the right, and clicking 'Delete' (or by simply selecting the object and using the hotkey 'Ctrl + D'). This will bring up a frame deletion menu where you can input what range of frames you want the object deleted from.
Moving and resizing objects need to be done to individually, but you can also select multiple objects at once for copy/paste, and deletion.
Here we see multi-selection of boxes, copying the selection, and then pasting them into the next frame. You can alternatively use the hotkey 'Ctrl + A' to select all boxes at once.
An image group is a collection of compressed images. This allows for more efficient annotation of semantically similar images, as you can use automation features such as object tracking algorithms to aid you in the annotation process.
Image groups are recognised by having an additional 'Display group images' icon in the upper right-hand corner of the editor. Click on the icon to toggle the 'Image group images' drawer.
You can search for and navigate to specific images in the 'Image group images drawer'. Simply click on 'Go to image' on a desired image, and the editor will navigate to the equivalent frame.