CloudCompare forum

any ideas what could have caused the shifts?

btw: you'll definitely get a big "thank you"-spot in my bachelor-thesis :D dunno what i'd have done without you.

here are the results of the volume-calcuation AFTER registrating the clouds to the 6h-cloud.

6-7:

Volume: -0.005
Surface: 90.133
----------------------
Added volume: (+)0.176
Removed volume: (-)0.181
----------------------
Matching cells: 99.5%
Non-matching cells:
ground = 0.2%
ceil = 0.2 ...

i just had a look on the locations of the compared clouds (7-13) relating to the reference cloud (6h):


7h:
behind + left shifted

8h:
a little bit behind + minimal shifted to the left

9h:
nearly identical to 7h

10h:
nearly identical to 6h tiny bit in front and a bit to the right

11h:
a bit ...

the surface values are kind of steady (differences caused by the empty cells again i guess) but as you can see the volume-calculation differs a lot.


edit: i just recognized that the 13h-cloud has a defect. there are some missing points because of a ship which covered a part of the wall. that's why ...

Ah ok ;)

So here are the results with an increased grid-size toi 0.04:

6-7h:

Volume: -11.677
Surface: 100.179
----------------------
Added volume: (+)0.001
Removed volume: (-)11.678
----------------------
Matching cells: 99.2%
Non-matching cells:
ground = 0.4%
ceil = 0.4%
Average neighbors per ...

Hi Daniel,
i will try it in an hour but it still doesn't justify the big shifts between the scans. at least for the m3c2-distances there will be huge differences.. i don't know what happened there.

Since the volume-calculation at 7h (volume: -11.420) and 9h (volume: -11.774) was quite similar, i did a comparison between these two clouds:

Volume: -0.407
Surface: 99.832
----------------------
Added volume: (+)0.158
Removed volume: (-)0.565
----------------------
Matching cells: 93.2%
Non ...

Hey Daniel,
you were right! it was just the missing shader :)

though i would be really thankful if you could have a look at the volume-calculation for the 2nd standpoint. after croppping the clouds to the same extends i get some really weird calculations. i know i'm really annoying but i need your ...

At the picture below you can see my display params and how it looks:

http://www.directupload.net/file/d/4448 ... gt_png.htm
http://www.directupload.net/file/d/4448 ... 9f_png.htm

your screenshots look way better.