Compare pointcloud to pointcloud - v2

This page describes how to execute pointcloud-based change detection leveraging Compare pointcloud to pointcloud v2 tool.

Main Toolbar > Extract > Compare pointcloud to pointcloud - v2

Compare pointcloud to pointcloud v2 compares two pointcloud covering a single scene and captured at different points in time. It automatically outputs pointclouds acting as a change-map.

1. Input:
   • Pointcloud A (opc format)
   • Pointcloud B (opc format)

1. Output:
   • Changes added (opc)
   • Changes Removed (opc)

Select the first pointcloud you want the comparison to be executed on.

Each comparison job fits in a project. Open recent one to retrieve previous results or create a new one to launch a new comparison job.

Select the second pointcloud you want to use for comparison. It must be loaded in iTwin Capture Manage & Extract frame and highlighted in the left side bar before being added.

• Threshold: Minimum distance defining a change between pointcloud A & B. If not defined, value will be automatically set
• Filter Threshold: Minimum distance filtering out identified changes. If not defined, value will be automatically set.
• Points per change Min: Minimum number of points for a change to be considered. If not defined, value will be automatically set

• Entire source: Compare pointclouds A and B on their entire extents
• Area: Restrict the comparison area to a fence you draw on a map or an existing vector polygon

Submit job to run pointcloud comparison.