Manual drawing

It is used for semantic / instance segmentation.

Before starting, you need to select Polygon on the controls sidebar and choose the correct Label.

Highlighted “Polygon” button and open “Draw new polygon” window

  • Click Shape to enter drawing mode. There are two ways to draw a polygon: either create points by clicking or by dragging the mouse on the screen while holding Shift.
Clicking points Holding Shift+Dragging
Example of creating a polygon by clicking points Example of creating a polygon by dragging with mouse

  • When Shift isn’t pressed, you can zoom in/out (when scrolling the mouse wheel) and move (when clicking the mouse wheel and moving the mouse), you can also delete the previous point by right-clicking on it.

  • You can use the Selected opacity slider in the Objects sidebar to change the opacity of the polygon. You can read more in the Objects sidebar section.

  • Press N again or click the Done button on the top panel for completing the shape.

  • After creating the polygon, you can move the points or delete them by right-clicking and selecting Delete point or clicking with pressed Alt key in the context menu.

    Additional options

  • Fixed number of points: Set a specific value in the Number of points field to automatically stop drawing after that many points.

  • Enable dragging: Right-click inside the polygon and choose Switch pinned property to enable moving the polygon.