Changes between Version 21 and Version 22 of Sensors/LeicaLIDAR/MikesNotes

Timestamp:

Sep 1, 2008, 10:50:52 AM (16 years ago)

Author:

mggr

Comment:

--

Sensors/LeicaLIDAR/MikesNotes

@@ -1 +1 @@
 == todo ==
 
-ground classification
-
-torsion error correction
+
+
+== Mirror torsion error correction ==
+
+This shouldn't need to be done with newer LIDARs, but included here in case.  Leica suggests checking for torsion errors if there seem to be problems in the boresight calibration and reporting to them if found.
+
+TBD
+
+== Ground classification ==
+
+Classification is the process of labelling the points in the point cloud by type.  Ground classification specifically refers to labelling points that're considered to be part of the ground(!)  This is a required step for the automatic boresight procedure.
+
+Steps:
+ * remove very low, noisy points from consideration first
+   * e.g. remove groups of up to 3 points > 1m below neighbours (iterate a time or two so it settles)
+
+
 
 
 == QC procedures ==
 
-''Mark seems to have covered these better, key concepts only here''
+''Mark seems to have covered these better, and this will need some detailed clicky info, key concepts only here''
 
 Essentially all using TerraScan.  The main things are:
@@ -39 +53 @@
 Calibration files are required and supplied by Leica (dark, gain and camera parameters).
 
-File name convention is: `''DDHHMMSSXXXXXXG''N.raw`
+File name convention is: `DDHHMMSSXXXXXXGN.raw`
  * DD = day of month
  * HHMMSS = timestamp