Sep 04

httpv://www.youtube.com/watch?v=dYeFvRv0x8I&rel=0

Laser scanning targets where there are high amounts of traffic (vehicle or pedestrian) can be problematic if maximum coverage is required. The Topcon GLS-1000 scanner has the facility to undertake “detailed” scan. In this mode, it repeats the data acquisition within the specified scan area two or three times. The final dataset will contain only the most distant returns and noise will be effectively removed.

The example here was on a busy dual carriageway at rush hour. A comparison of the two datasets is shown below. Scan time is increased, however the most important thing – maximum data coverage is easily achieved.

Side view comparison

Side view comparison

Front view (oncoming traffic) comparison

There are still some elements of noise which may be attributable to objects (i.e. vehicles) that were in the same location for each of the multiple passes.

One Response to “Laser scanning on busy roads”

  1. admin says:

    UPDATE: The new version of Scanmaster (V2), released in September 2010 now has dynamic noise removal tool plus ground extraction making removal of unwanted features from your point clouds very simple.

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