Introduction to Labeling Tools

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Free Rectangle Tool

The Free Rectangle Tool can be used to draw a rectangle around the text area. Therefore, it is recommended to select this tool for rectangular text areas.

free rectangle tool

  1. Click tools introduction free rectangle icon (or press D on the keyboard).

  2. Move the crosshair cursor in the selection region and left-click to select the starting point of the area you want to outline. Then, move the cursor and left-click again to select the second point to define the range you want to outline. At this point, a straight line will be created, forming one side of the rectangular selection frame.

  3. Moving the cursor to either side of the straight line will allow you to create a rectangle. Click the left mouse button to complete the labeling.

During the process, you can click the right mouse button to cancel the labeling.

Polygon Tool

The Polygon Tool can draw polygon labels with more vertices, which is suitable for text areas of complex shapes or those near the image edges.

  1. Click 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.)

After labeling, use the Select Tool to select a label and adjust the label by the following methods.

  • Click the label edges to increase the number of vertices.

  • Right-click a vertex to delete it.

  • Long press the left mouse button and drag the vertex in any direction to modify the label shape.

Template Tool

You can use the Template Tool to set an existing selection as a template. After setting, you can use this template to rapidly label contours and objects with the same pose.

It is suitable for scenarios where there are multiple neatly arranged objects of the same type in an image, which can improve labeling efficiency.

tools introduction seal

  1. Click tools introduction seal icon (or press C on the keyboard).

  2. Click the region that needs to be set as the template.

  3. Move the template to the to-be-selected object, adjust the angle of the template to make it fit the object, and then click it.

    • Coarse adjustment: Press and hold the Shift key and then scroll the mouse wheel.

    • Fine adjustment: Adjust the Rotation angle parameter.

During labeling, press and hold the Ctrl key and click the selection to switch the template. You can also click Replace template and then click the selection to achieve the same purpose.

ROI Tool

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

Setting the ROI can avoid interferences from the background.

tools introduction roi1

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

  2. Adjust the ROI frame in the selection region.

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

Select Tool

You can use the Select Tool to select, move, and adjust the selections.

  1. Click tools introduction select icon (or press S on the keyboard).

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

Adjust size

tools introduction select1

Rotation

tools introduction select2

Move

tools introduction select3

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