The 3D point cloud annotation platform is developed and owned by SurfingTech. It has two versions: Discrete-image Annotation and Video-sequence Annotation.
The discrete image refers to single frame point cloud data with no time sequential connections. Each frame image needs to be annotated separately as shown below. Very often, the number of points in a single frame image is insufficient, thus it is necessary to project the color of the 2D image onto the corresponding point in the 3D point cloud data. At the same time, annotators need to refer to the 2D image to finish the annotation.
For Video-sequence Annotation (scene-based), we reconstruct the 3D scene using to the continuity between frames first and then annotate it in the 3D scene. The annotation is projected back to each frame of 2D images and point cloud data to form the annotation result.