2D Polyline/Line

Overview: Polyline or Line annotations are continuous lines made of one or more line segments. The entire line is treated as one object. Polylines are typically used to annotate open shapes since they don’t have to be closed as polygons do. This tool is often used to label shapes like road lane marks or other similar shapes.

Steps to Draw a Line:

1. Click on Label type and select Line from the top left menu of the editor.

   
2. Select a category from the drop-down box.

3. Draw a line keeping points on the image with a left mouse click. 4. You can draw another line by pressing the “Esc” key twice. 5. You can select the label by clicking on the label with a left mouse click. 6. Double-click on the line to edit the selected 2D-Line, by dragging the highlighted points of the line with a left mouse click, and also you can delete the selected highlighted point by pressing the “Delete” key. 7. To add a point on the line, click on the line using the left mouse click. 8. Labels are saved automatically. 9. Users can submit their work by clicking on the submit button at the bottom. Refer to Task Life Cycle for more information.