The surveyors nightmare!

To chat about anything else.
User avatar
blazaj
V.I.P Member
V.I.P Member
Posts: 510
Joined: Tue Jan 26, 2010 1:07 pm
14
Full Name: Jiri Blazek
Company Details: BW precision systems sro
Company Position Title: Managing Director
Country: Czech Republic
Linkedin Profile: No
Has thanked: 45 times
Been thanked: 18 times
Contact:

Re: The surveyors nightmare!

Post by blazaj »

blazaj wrote:In such case I would run targetless registration first and than used detected checkerboards for quality checks :)
OK, I know, I deserve it!

Image
User avatar
Dedken
V.I.P Member
V.I.P Member
Posts: 370
Joined: Fri Mar 15, 2013 10:28 am
11
Full Name: Kenneth Bazley
Company Details: Sir Robert McAlpine
Company Position Title: Senior Geospatial Engineer for HDS
Country: UK
Linkedin Profile: Yes
Location: London

Re: The surveyors nightmare!

Post by Dedken »

I've found once before that brick facades got turned into thousands of checkerboard targets (if you check the 'detect checkerboards' option in Scene preprocessing). After that I decided to manually mark my checkerboards...
All views are my own and are not representative of my employer, The King, God or anyone else for that matter.

"we need an instrument, to take a measurement" - I.MacKaye 1992
User avatar
imcid953
V.I.P Member
V.I.P Member
Posts: 195
Joined: Wed Jun 04, 2014 2:03 pm
9
Full Name: William J. Bryan
Company Details: Eye On Detail
Company Position Title: CEO
Country: USA
Linkedin Profile: Yes
Location: San Antonio, TX
Been thanked: 2 times
Contact:

Re: The surveyors nightmare!

Post by imcid953 »

I have found Scene loves to pick bollards as spheres. I've also seen a car mirror, a knot in a tree, and my coworker's shoulder selected.

Bill
William J. Bryan

"I prefer the tumult of liberty to the quiet of servitude." - Thomas Jefferson.
geowac
V.I.P Member
V.I.P Member
Posts: 353
Joined: Thu Jan 23, 2014 10:07 am
10
Full Name: Stefan Wachsmann
Company Details: scantaxi.de
Company Position Title: supervisor
Country: Germany
Linkedin Profile: No
Location: Germany
Been thanked: 1 time
Contact:

Re: The surveyors nightmare!

Post by geowac »

imcid953 wrote:I have found Scene loves to pick bollards as spheres. I've also seen a car mirror, a knot in a tree, and my coworker's shoulder selected.
And bald plates and heads of sculptures are nice spheres, too :D
geowac_sculpture.jpg
Stefan
You do not have the required permissions to view the files attached to this post.
max72
V.I.P Member
V.I.P Member
Posts: 846
Joined: Tue Feb 26, 2013 9:32 pm
11
Full Name: Massimo De Marchi
Company Details: Massimo De Marchi
Company Position Title: freelancer
Country: Italy
Skype Name: massimo_de_marchi
Has thanked: 15 times
Been thanked: 53 times
Contact:

Re: The surveyors nightmare!

Post by max72 »

I often find much faster hand detecting the targets.
There are a lot of false positives with old buildings, trees and furniture, anc cleaning them is extremely time consuming.
Probably the prerequisite is the same person must do both the survey and the post processing.
Massimo
ing. Massimo De Marchi - +39 347 32 17 049 - www.studiodemarchi.net
User avatar
Oliver Buerkler
Global Moderator
Global Moderator
Posts: 1446
Joined: Mon Oct 06, 2008 9:44 am
15
Full Name: Oliver Buerkler
Company Details: FARO Europe GmbH
Company Position Title: Director of Laser Scanning
Country: Germany
Skype Name: oliver_buerkler
Linkedin Profile: Yes
Has thanked: 38 times
Been thanked: 12 times
Contact:

Re: The surveyors nightmare!

Post by Oliver Buerkler »

Hello.

Very nice examples :-)

Eugene: might it be you are somehow attracted by strange places to scan? Whenver I visited the Orlando Airport rest rooms, I never thought about scanning them. ;-)

Seriously:
In most cases, non-targets detected by SCENE should not be an issue.
As long as they only exist in one scan at the exact position (like on vegetation, people etc.) SCENE will not find corresponding targets in another scan. Thus they will not be used for placing the scans.
If the non-targets exist in more than one scan they should also not cause a problem as long as they did not move.

Best regards,
Oliver Bürkler
Oliver Bürkler
Director of Laser Scanning
FARO Europe GmbH
[email protected]
[email protected]

Twitter: FARO_LS_PM
User avatar
3DForensics
Honorary Member
Honorary Member
Posts: 1979
Joined: Mon Aug 03, 2009 1:52 am
14
Full Name: Eugene Liscio
Company Details: AI2-3D Forensics
Company Position Title: Owner
Skype Name: eliscio
Location: Toronto, Canada
Has thanked: 13 times
Been thanked: 70 times
Contact:

Re: The surveyors nightmare!

Post by 3DForensics »

Oliver,

Since I've started scanning, I'll never look at a chess board the same. It's like a defect...I walk into a room and start thinking about where to place targets and how I am going to scan...

Tell me I am not alone please!
Scott
V.I.P Member
V.I.P Member
Posts: 1037
Joined: Tue Mar 29, 2011 7:39 pm
13
Full Name: Scott Page
Company Details: Scott Page Design- Architectural service
Company Position Title: Owner
Country: USA
Linkedin Profile: No
Location: Berkeley, CA USA
Has thanked: 205 times
Been thanked: 78 times
Contact:

Re: The surveyors nightmare!

Post by Scott »

Since I've started scanning, I'll never look at a chess board the same. It's like a defect...I walk into a room and start thinking about where to place targets and how I am going to scan...
Tell me I am not alone please!
Yes, one is forever changed by the process of target/scanner placement. ;)
You do not have the required permissions to view the files attached to this post.
User avatar
Matt Young
Honorary Member
Honorary Member
Posts: 3929
Joined: Fri Nov 30, 2007 3:03 pm
16
Full Name: Matt Young
Company Details: Baker Hicks
Company Position Title: CAD-BIM Lead
Country: UK
Linkedin Profile: No
Has thanked: 45 times
Been thanked: 40 times

Re: The surveyors nightmare!

Post by Matt Young »

Not sure about targets, but I do see the world as intensity mapped now and not in colour anymore :lol:
If you don't see that there is nothing, then you are kidding yourself.
User avatar
jcoco3
Global Moderator
Global Moderator
Posts: 1724
Joined: Sun Mar 04, 2012 5:43 pm
12
Full Name: Jonathan Coco
Company Details: Consultant
Company Position Title: Owner
Country: USA
Linkedin Profile: No
Has thanked: 70 times
Been thanked: 157 times

Re: The surveyors nightmare!

Post by jcoco3 »

Ha, for me it is a point cloud fly-through animation from a strange camera path. I can hardly look at things anymore without getting dizzy just thinking about the animation I am going to create :oops:

I find the physiological effects of photography and thermography to be just as disruptive. At times I imagine what the thermal color ramp is going to look like, which can be a little psychedelic :lol:
Eugene: might it be you are somehow attracted by strange places to scan? Whenver I visited the Orlando Airport rest rooms, I never thought about scanning them. ;-)
Eugene! Taking pictures in the restroom...tisk..tisk :lol:
Post Reply

Return to “General Chat”