When you annotate 2D/3D fusion boxes, there are 4 steps you need to master. We provide a deeper explanation of each step further down on this page.
Draw and adjust the object in 3D
Set 3D-specific properties
Draw and adjust the object in 2D
Set 2D specific properties
When you put everything together, the ideal workflow should resemble the following.
This workflow can be fully guided if you use Action assist: 2D / 3D fusion if prelabels exists.
If you are working with prelabels, Copilot is the preferred option.
With any of the 3D box tools active, click on a prelabel to create a box, OR select the prelabel and then a class. This is the fastest option if the prelabel is of good quality.
If no prelabels are available or if an object was missed, use the regular drawing tools to create the object.
The Auto-adjust objects feature resolves about 95% of all minor adjustments and is available for vehicle-type objects. To determine if the feature is available for a class, check if the class is drawn by default with machine assistance.
Second best for minor adjustments is to use the Transformation controls. Using the snapping featuresnapping feature of the transformation control sets productive users apart from others. It is a must to learn when to use it.
Editing objects in single frame is slow. Drawing the object is faster and requires at most 4 clicks - and if the prelabel is good enough, just one click. Since you should already have a 3D box that you are connecting, activate draw connected object by pressing the button in the right side menu or by pressing zero (default shortcut). Use the 2D bounding boxes to create the object.
You can use Action Assist (shift+space) in order to quickly go to the next camera source where the 3D box is visible. You will be zoomed in to the location and the draw tool is activated for you making it even faster.
If you are working with prelabels then Copilot is available to you. You can simply shift+click without a drawing tool active to create an identical bounding box. If there are many overlapping prelabels you can right click to send it to the back.
If the object is clearly visible not occluded in any way you can use the can use the2D machine-assisted tools if there are no prelabel at the location.
If you created the object from a prelabel with Copilot (but it's not good enough) and the object is clearly visible and not occluded in any way, we recommend using Auto adjust object.
Otherwise transform the object using the transformation controls, or redraw the object with the bounding box drawing tool. Placing four points can sometimes be more efficient than editing.
Enable pixel snapping in the Edit menu. This will prevent you from making edits on sub-pixel level that is wasted time.
You can set properties in two ways.