Delete points from mirror

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jaredmatthews
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Delete points from mirror

Post by jaredmatthews » Tue Oct 25, 2016 9:12 pm

Hi All.

I have recently made the switch from Scene to Realworks.

I am still finding my feet with the software. How do you PERMANENTLY remove scan points from a scan?

I have reflected points in a mirror that are projecting into the room next door. If I register the the scans together, then the points in the next room will be exported as such.

I know you can segment scanpoints in order to view scans better when matching in cloud to cloud registration mode, but once the two clouds are registered together, the segmented points are refreshed.

I basically want to delete the points permanently from the one scan, and then register it to the other scans.

See attached image for reference
mirrored scans.png
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apjokr
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Re: Delete points from mirror

Post by apjokr » Wed Oct 26, 2016 9:26 am

Hi Jared,

At the Production module, you have the Edit menu>Delete points from TZF scans
but
My suitable workflow is to first register the pointcloud,
from the Project cloud>sampling by scan
segmentation for those scans
the clean segmentated cloud objects can be merged into one cloud (ctrl+m)

in this way i have the requested area without noise.
If you use targaetless registration, probably the mirror-noise will have affect on the calculation so try the first one.

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Phil Marsh
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Re: Delete points from mirror

Post by Phil Marsh » Wed Oct 26, 2016 10:39 am

Could you view the individual scan from the laser scanner then window around the mirror?

apjokr
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Re: Delete points from mirror

Post by apjokr » Wed Oct 26, 2016 11:37 am

yes, correct.
the same was the procedure when we did a scan in a shoe-store.
each registered scanposition can be created as a new cloud object, and the unwanted area can be fenced out.
then you can use/export each scanposition divided, or merged together, whatever the customer needs.

back in the days it was useful to have scanpositions divided in the modeling software due to the hardware-possibilities.

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Re: Delete points from mirror

Post by Christophe21 » Fri Dec 02, 2016 12:53 am

apjokr wrote:yes, correct.
the same was the procedure when we did a scan in a shoe-store.
each registered scanposition can be created as a new cloud object, and the unwanted area can be fenced out.
then you can use/export each scanposition divided, or merged together, whatever the customer needs.

back in the days it was useful to have scanpositions divided in the modeling software due to the hardware-possibilities.
Huh THANKS !
This help me a lot !

Can we batch this in order to automatically create object from each (registration) group ?
(and then let the processor do his job a few days ...)

For example you have several building with numerous room with around 3 or 4 station each room and you want to create a cloud objet for each room in production

jaredmatthews
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Re: Delete points from mirror

Post by jaredmatthews » Mon Feb 27, 2017 4:04 pm

apjokr wrote:yes, correct.
the same was the procedure when we did a scan in a shoe-store.
each registered scanposition can be created as a new cloud object, and the unwanted area can be fenced out.
then you can use/export each scanposition divided, or merged together, whatever the customer needs.

back in the days it was useful to have scanpositions divided in the modeling software due to the hardware-possibilities.
Bumping this post, as I STILL have no clue how to do this.

Could someone give a more detailed step-by-step of how this is achieved?

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