segmenting point cloud using plane

[Ingsayyad]

How can I segment my point cloud using plane criteria. All point above /below this plane should be segmented. How can I define my plane.
I have picked points, fitted a plane and now wanted to segment cloud using this plane. see attachment

Question B:
How can I set limit of dynamic points (>1 M) to prevent closing up of program.I have 2 GB data and program cann't work with it. Decimate big cloud>10 M limit is too much for my computer.

[daniel]

You should compute the distance to the plane, then segment with 'Edit > Scalar Fields > Filter by value'. To define the plane, either you can fit a plane on an existing point cloud ('Tools > Fit > Plane') or define your own with the 'File > Primitive Factory' (once the plane is defined you can apply a transformation with 'Edit > Apply Transformation').

And for the dynamic limit you are talking about, the default 10 M. is only for display (when you rotate the view). Not sure it would help to lower it (and you can't anyway ;). And by "closing" do you mean that CC crashes?

[Ingsayyad]

yes, It crashes. I have imported bin file with 1.11 GB.

I have sys specs
Win 7 64 bit
Intel(R) Xeon (R) CPU E5-1620 0@3.6GHz 3.60 Ghz
Ram:40Gb

[daniel]

Can you give more information about the crash? Any system message? The exact procedure (i.e. you load the file and CC crashes right away?).

Thanks,