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Configuration Tab

This article describes setting the configuration parameters in the Configuration Tab of Vercator Desktop.

Configuration Stages and Parameters

Above is the interface of the Configuration Tab. It contains a few of the parameters that can be changed depending on the nature of the data being processed.

Start: starts the processing of the enabled stages with the configuration settings below.

CPU Threads: This defines the number of processes that will be run at once for each stage. The higher the thread count the more simultaneous processes run.

CPU Threads

This is limited by your CPU, the amount of RAM your computer has and, if not using an SSD, the access speed of your spinning disk hard drive. In our testing 3 threads have been the maximum to use when reading from a spinning disk hard drive without degrading performance.

A rough guide to calculating this figure is to take your RAM size and divide it by 4 times the average size of one of your scans. For example: 16GB RAM / (1.2GB PTX * 4) = 3.3, therefore 3 threads is likely the limit to safely run without memory errors.

If instability or out of memory errors occur, reduce this value.

Preprocessing Parameters (First Load Preprocessing)

Max Distance Threshold: the maximum point distance from the scanner to use in the registration

Resampling: the minimum distance between points, smaller figure increases processing time.

Scan Descriptors Parameters (Feature Calculation)

No user settings

Coarse Registration Parameters (Calculates Coarse Registration)

No user settings

Coarse Registration Report Parameters (Calculates quality measures of Coarse Registration for blunder check)

Maximum Distance: the maximum distance to search for corresponding points between scans for fit statistics calculations

Fine Registration Parameters (Calculates Fine Registration)

Maximum Scan Separation Distance: maximum distance between any two scans for them to be registered to each other. If this value is too low, the scans may become split into two or more disconnected groups and the program will print an error message as this is currently unsupported.

Minimum Scan Overlap %: minimum overlap between scans to consider calculating fine registration group solution with. This setting can affect scans with long range points where a tiny fraction is overlapping a series of much denser scans clustered nearer to a specific scene. A larger percentage may be less precise at distance but computes faster, whereas a smaller percentage may be more precise at distance but more sensitive to noise and compute slower.

Fine Registration Report (calculates fine registration result report)

No user settings

Scan Transformation Parameters (Applies final registration transformations to the original data)

Resample Spacing: spacing to export final registered point clouds with. If = 0 then no subsampling takes place.

Output Format: the format to output, currently either XYZ, PTS, PLY, e57, LAS, LAZ.