CloudCompare forum

Hi,

From outputs of M3C2 you get STD cloud 1 and STD cloud 2. If you use the Gaussian distribution of the data you will have a histogram. The histogram will give me a Gauss mean value and std.dev. value. My question is which value to take as the average local surface roughness of the cloud?

thanks

The 'STD' scalar fields correspond to the local 'roughness' computed on each cloud by M3C2.

If you use the 'Histogram' or 'Fit distribution' tools, then you'll only get the standard deviation of the currently selected scalar field.

Thanks for your reply. If you take the average value of STD_cloud 1 in Excel which will be the same as the Gauess: ''mean'' value in the histogram, does this considered as the average local roughness of the cloud 1? for example if I take the averages in excel of the values below, does this mean the average local roughness of the clouds?
STD_cloud1 STD_cloud2
0.008038 0.009875
0.011158 0.017146
0.025355 0.011227
0.023352 0.023446
0.010297 0.034551
0.010134 0.012978
0.006155 0.031189
0.005137 0.029461

Thanks

Well I would agree, yes. And indeed, you'll get this value directly by fitting a Normal distribution on each STD scalar field.