Introduction to Labeling Tools

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You can use labeling tools to label the images and hence provide data for deep learning training.

Polygon Tool

The Polygon Tool can draw polygon labels with more vertices, which is suitable for objects of complex shapes.

  1. Click the Polygon Tool icon tools introduction polygon icon (or press P on the keyboard).

  2. Click the first position (vertex) in the selection region, then click the second one, third one, etc., to draw the labels, and right-click to finish. (At least three vertices are required.)

  3. If multiple label classes are created, colors corresponding to different label classes should be selected.

Ellipse Tool

Use more vertices to make elliptical selections. This tool is suitable for elliptical objects.

  1. Right-click the Polygon Tool icon tools introduction polygon icon and then click the Ellipse Tool icon tools introduction oval icon (or press L on the keyboard).

  2. Long press the left mouse button in the selection region, move it in any direction, and then release the left mouse button to finish the ellipse selection.

  3. If multiple label classes are created, colors corresponding to different label classes should be selected.

Rectangle Tool

The Rectangle Tool can be used to draw rectangular labels, which is suitable for rectangular objects.

  1. Right-click the Polygon Tool icon tools introduction polygon icon and then click the Rectangle Tool icon tools introduction rectangle icon (or press R on the keyboard).

  2. Long press the left mouse button in the selection region, move it in any direction, and then release the left mouse button to finish the rectangular selection.

  3. If multiple label classes are created, colors corresponding to different label classes should be selected.

Smart Labeling Tool

The Smart Labeling Tool can be used to automatically select the objects in the image. When multiple objects in an image have large color differences and are scattered, you can use the Smart Labeling Tool to conveniently label the objects in the image.

Currently, the Smart Labeling Tool can work in two modes, and it will automatically switch between them according to the actual situation. Users do not need to manually select a mode.

  • Standard mode (GPU): In this mode, the Smart Labeling Tool has robust labeling capabilities. This tool will automatically switch to the standard mode if the running device has a GPU, with available GPU memory of at least 2.5 GB, and there is no project undergoing training or validation.

  • Lite mode (CPU): In this mode, the Smart Labeling Tool has basic labeling capabilities. This tool will automatically switch to the lite mode if the running device has no GPU, or the available GPU memory is less than 2.5 GB, or there is a project undergoing training or validation.

Steps

  1. Click the Smart Labeling Tool icon tools introduction smart labeling icon (or press A on the keyboard).

  2. Move the cursor in the selection region and then click the object to be labeled.

    • If the selection cannot completely cover the object, click the uncovered part to expand the selection area.

    • If the selection covers the areas outside the object, right-click these areas to reduce the selection area.

  3. Click Apply in the upper-left corner of the selection region.

When the objects differ greatly in colors and have clear contours, it is recommended that you label multiple objects at a time and click Apply. If the objects are not obviously distinct, it is recommended to label one at a time.

Mask Tool

If there are some irrelevant parts that may interfere with model training, you can use the Mask Tool to cover such parts. The masked parts will not be involved in training. It is recommended to set a distinct color for the mask.

You can choose among the following three mask tools built in the software according to actual needs.

Mask Polygon Tool

  1. Click the Mask Polygon Tool icon tools introduction mask polygon icon (or press Shift + P on the keyboard).

  2. Set “Fill” for the mask.

  3. Click the first position (vertex) in the selection area, then click the second one, third one, etc., to draw the labels, and right-click to finish.

Mask Brush Tool

  1. Right-click the Mask Polygon Tool icon tools introduction mask polygon icon, and then click the Mask Brush Tool icon tools introduction mask pen icon (or press Shift+B on the keyboard).

  2. Set the “Fill” of the mask and adjust the slider to determine the brush size.

  3. Press and hold the left mouse button in the selection area, move in any direction, and then release the left mouse button to finish the drawing.

Mask Lasso Tool

  1. Right-click the Mask Polygon Tool icon tools introduction mask polygon icon, and then click the Mask Lasso Tool icon tools introduction mask lasso icon (or press Shift+N on the keyboard).

  2. Set “Fill” for the mask.

  3. Press and hold the left mouse button in the selection area and move in any direction to form closed shapes with the starting point.

Mask Eraser Tool

The Mask Eraser Tool can be used to erase the masks.

  1. Click the Mask Eraser Tool icon tools introduction mask eraser icon (or press Shift + E on the keyboard).

  2. Press and hold the left mouse button in the selection area and move in any direction.

    Adjust the slider to change the eraser size.

ROI Tool

You can use the ROI Tool to set the region of interest.

Setting the ROI can avoid interferences from the background.

  1. Click the ROI Tool icon tools introduction roi icon (or press O on the keyboard).

  2. Adjust the ROI frame in the selection region.

  3. Click the application icon tools introduction OK in the lower-right corner of the ROI to apply the current ROI or click the close icon tools introduction cancel to disable the ROI Tool.

  4. Click the Reset button in the upper left corner of the image to reset the ROI.

Select Tool

The Select Tool supports coarse and fine-tuning labeling.

  • Roughly adjust labeling

    You can use the Select Tool to zoom, select, move, resize, rotate, etc.:

    1. In the labeling toolbar, click the Select Tool icon tools introduction select icon (or press F on the keyboard).

    2. You can perform operations such as scaling, selecting, moving, and roughly adjusting labels:

      • Place the cursor in the selection area of the image and use the mouse wheel to scroll forward to zoom in and scroll backward to zoom out.

      • Move the cursor in the selection region and then click the selections to be processed. Select multiple selections by pressing and holding the Ctrl key.

      • Right-click and drag in the selection area to select all labels within the selected area.

        Adjust size

        tools introduction select1

        Rotation

        tools introduction select2

        Move

        tools introduction select3

  • Finely fine-tune labeling contours

    When the labeling is completed and the vertices cannot be adjusted directly, you can use the Select Tool to fine-tune the label:

    1. In the labeling toolbar, click the Select Tool icon tools introduction select icon (or press F on the keyboard) to select the label to be adjusted.

    2. Adjust the contour in one of the following three ways according to actual situation. Please ensure that the selected area closely aligns with the object contour.

      • Place the mouse cursor on a vertex of the contour. When the cursor turns into the hand cursor tools introduction smart labeling change2, long-press the left mouse button and drag the vertex to adjust the contour.

      • Place the mouse cursor on a vertex of the contour. When the cursor turns into the hand cursor tools introduction smart labeling change2, click the right mouse button to delete the vertex.

      • Place the mouse cursor on the contour. When the cursor turns into the cross cursor tools introduction smart labeling change1, click the left mouse button to add a vertex.

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