Merging e57 in command line

[t.gueg]

Hi!

I'm working with CloudCompare 2.11 in command line mode, and I'm trying to merge several ".e57" point clouds obtained by different scanning stations, however, when I do so in the command line, only one station is kept.

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.\CloudCompare.exe -SILENT -C_EXPORT_FMT E57 -NO_TIMESTAMP -o 'D:\cloud1.e57' -o 'D:\cloud2.e57' -o 'D:\cloud2.e57' -o 'D:\cloud3.e57' -AUTO_SAVE OFF -MERGE_CLOUDS -SAVE_CLOUDS FILE 'D:\merge_cloud.e57'

The problem doesn't occur when I do it on the application. (Ctrl+a > merge multiple clouds)

Could there be a way to keep all station informations?

Thanks,
Theo

[daniel]

What's displayed in the console?

[framed]

Yes the loss of Sensors in command line mode is annoying. Also not working for e57 files that contain multiple clouds (e.g. TLS data) in command line mode is:
- Generating scalar field with original cloud index when merging, and
- Global shift using Auto or First mode doesn't apply the same shift to all clouds in the e57.

[t.gueg]

Hi,

Unfortunately, everything seems to work well in the console...

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Output export format (clouds) set to: E57
[LOADING]
Opening file: '.\cloud1.e57'
[E57] 'formatName' - ASTM E57 3D Imaging Data File
[E57] 'guid' - {d050c58d-19c7-446c-b683-b2600278b1ec}
[E57] 'versionMajor' - 1 (INTEGER)
[E57] 'versionMinor' - 0 (INTEGER)
[E57] Reading new scan node (0)
[E57] Internal description: Created by CloudCompare v2.11 beta (Anoia)
[E57] Reading new image node (0)
[E57] Reading new image node (1)
[E57] Reading new image node (2)
[E57] Reading new image node (3)
[E57] Reading new image node (4)
[E57] Reading new image node (5)
[I/O] File '.\cloud1.e57' loaded successfully
Found one cloud with 11590516 points
[LOADING]
Opening file: '.\cloud2.e57'
[E57] 'formatName' - ASTM E57 3D Imaging Data File
[E57] 'guid' - {9538a8d5-48b5-482f-a2fb-2d9f33091871}
[E57] 'versionMajor' - 1 (INTEGER)
[E57] 'versionMinor' - 0 (INTEGER)
[E57] Reading new scan node (0)
[E57] Internal description: Created by CloudCompare v2.11 beta (Anoia)
[E57] Reading new image node (0)
[E57] Reading new image node (1)
[E57] Reading new image node (2)
[E57] Reading new image node (3)
[E57] Reading new image node (4)
[E57] Reading new image node (5)
[I/O] File '.\cloud2.e57' loaded successfully
Found one cloud with 11624440 points
Auto-save is disabled
[MERGE CLOUDS]
[SAVING]
[I/O] File './/merge_cloud.e57' saved successfully
Processed finished in 35.23 s.

I forgot to mention that the images are well merged.

And for the station, it appears that pretty much all informations (box center, matrix, axis/angle ...) are taken from the station from the first point cloud except for the local box dimension which as a new value not present in any other stations.

Thanks for your help,
Theo

[daniel]

If you merge the clouds, then indeed, only the meta-data associated to the first cloud are kept (we wouldn't know what to do with the others in the way things are implemented - there's only one set stored per cloud). Otherwise you shouldn't merge them (the scans will still be saved all in one cloud if you use the 'ALL_AT_ONCE' option).

And in your resulting E57 file, how many points do you get in the (unique) scan?

[t.gueg]

Hi Daniel,

Thanks for your answer.

The number of points on my resulting point cloud is 23M, so it seems right.

The only issue I had was the loss of sensors, I'll find a way around to merge e57 and keep sensors informations.

Thanks for your help