4. How to tag

ReNomTAG provides three tagging modes for creating labeled data. In Detection mode, users can create bounding box information for object detection models. In Segmentation mode, users can create pixel-level segmentation labels for semantic segmentation models. In Classification mode, a single label is assigned to an image to describe the class of the object in the image. Each mode is described below.

To switch between the modes, click the mode you would like to use at the upper right.

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4.1. Detection mode

4.1.1. Create tags (bounding boxes)

You can create a tag (bounding box) by dragging the cursor inside the image.

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Note

For saving the tag (a pair of bounding boxes and tag name), a class tag name is required.

4.1.2. Save tags

To save the tag, please click the save button. The Space key also acts as a shortcut for saving.

4.1.3. Hide all unselected tags

You can choose to hide unselected boxes by clicking the toggle button . Ctrl+d can also be used as a shortcut for this. New boxes can still be added in this mode. Return to the normal view by clicking the toggle button or using Ctrl+d again.

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4.1.4. Set shortcut keys for class tags

You can set a shortcut key for each class tag name.

4.1.5. Default shortcut keys for faster tagging

ReNomTAG provides the following default shortcuts for faster tagging.

  • Ctrl+b : Copy all boxes from previous image and paste on current image.
  • Ctrl+c, Ctrl+v : Copy currently selected box and paste on current image.
  • Ctrl+z : Undo previous change to box (shape, position, or class tag).

4.1.6. Full-screen tagging

Tag in full-screen mode with the Ctrl+w or clicking the third icon at the bottom of the current image. Return to normal mode by using the same shortcut or clicking the same icon.

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4.1.7. Expanding/shrinking images during tagging

Expand or shrink the active image by using the trackpad or the + or - buttons in the toolbar at the bottom of the image. Return to the original image size by clicking the second icon on the toolbar.

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4.2. Segmentation mode

4.2.1. Create segmentation labels

Segmentation labels are created as polygons with vertices defined at each location the user clicks.

Create a segmentation label by first clicking anywhere along the boundary of the object to be segmented. The initial point is represented by a enlarged, hollow circle. Move around the border of the object and click at regular intervals to create polygon vertices.

The vertices will be connected by straight lines.

After returning to the original point, click inside the hollow circle again to fill in the polygon.

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Then select a class label from the list at right to select the class of the area you just created. The color of the polygon will change to reflect the class color.

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Click the image anywhere outside the active polygon area to exit editing mode. You can now save the label information.

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To edit an existing polygon, click once inside the polygon to enable editing. The polygon vertices will reappear for editing.

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Note

For saving the label (polygon vertices and class name), a class tag name is required.

4.2.2. Save label

To save the label, please click the save button. The Space key also acts as a shortcut for saving.

4.2.3. Set shortcut keys for class tags

You can set a shortcut key for each class tag name.

4.2.4. Full-screen tagging

Tag in full-screen mode with the Ctrl+w or clicking the third icon at the bottom of the current image. Return to normal mode by using the same shortcut or clicking the same icon.

../_images/how_to_tag04.png

4.2.5. Expanding/shrinking images during tagging

Expand or shrink the active image by using the trackpad or the + or - buttons in the toolbar at the bottom of the image. Return to the original image size by clicking the second icon on the toolbar.

../_images/how_to_tag05.png

4.3. Classification mode

4.3.1. Create classification labels

Classification labels are assigned as a single class label for an entire image.

Create a classification label by simply selecting the class name from the class list on the right or using the corresponding shortcut key for the class you want to assign.

Note

For saving the classification label, a class tag name is required.

4.3.2. Save label

To save the label, please click the save button. The Space key also acts as a shortcut for saving.

4.3.3. Set shortcut keys for class tags

You can set a shortcut key for each class tag name.

4.3.4. Full-screen tagging

Tag in full-screen mode with the Ctrl+w shortcut. Return to normal mode by using the same shortcut.