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Ruben JOYE - [email protected] Lecturer University College Ghent (Faculty School of Arts)
THURSDAY, 31 MAY 2012 - 16U00 - TEACHING DIGITAL PLANNING METHODS
Generating a point cloud from a crowdsourced photographic survey
INTRODUCTION
L:N Landscape forum (source: le-notre.org)
INTRODUCTION
Antalya (Turkey) (source: lonelyplanet.com)
INTRODUCTION
Sillyon / Sillyum (source: Google Maps)
INTRODUCTION
Sillyon / Sillyum (source: Google Maps)
INTRODUCTION
[A] Lower gate [B] Ramp [C] Bastions [D] Tower[E] Late Building [F] Hellenistic building[G] Building with Pamphylian inscription [H] Cistern[J] Theatre[K] Odeum [L] Upper Gate[M] Houses[N] Temple [01] Unidentified Building[02] Temple[P] Stadium[Q] Palace [R] Necropolis[S] Waterworks [T] Round Tower
PLAN OF Sillyum (SOURCE: Bean G.E.)
INTRODUCTION
Sillyum seen from Asar Koyu (photo: Bean G.E.)
INTRODUCTION
Water source near lower gate (photo: Argyraspid)
INTRODUCTION
Theatre (photo: Argyraspid)
INTRODUCTION
3d scanned farm house (image: djaweb) (PHOTO: LEICA)
INTRODUCTION
test with a local chapel
URL: http://photosynth.net/view.aspx?cid=515b5e37-9d99-4395-afcf-93295c425056
INTRODUCTION
URL: http://photosynth.net/view.aspx?cid=515b5e37-9d99-4395-afcf-93295c425056
test with a local chapel
INTRODUCTION
Exported pointcloud edited in Autocad
INTRODUCTION
Le:Notre heritage group on the Sillyum site
PHOTOGRAPHIC SURVEY
ATTENTION POINTS:
• provide enough overlap between photos
• panorama first• don’t crop pictures• shoot wide angle pictures• limit the angle between
photos• move around the object• shoot scenes with lots of
detail and texture
(source: photosynth blog)
visual reference (image: Photosynth blog)
SITE 1: tower
FOTO 2:reutelbeekPHOTO 099
:
TOWER
FOTO 3:
Roeselarestraat
PhOTO 239TOWER
Photo 359
tower
PHOTOGRAPHIC SURVEY
PHOTOGRAPHIC SURVEY
SITE 2: palace area
PHOTO 290
PALACEPHOTO 059
PALACE
FOTO 3:Roeselarestraat
PhOTO 341PALACE
PHOTO 589PALACe
GENERATING THE POINT CLOUD USING PHOTOSYNTH
The easy to use interface of Photosynth
PHOTOSYNTH:
• download from photosynth.net
• requires Silverlight NET• requires a free Windows
Live account• reliable and fast broadband
connection is needed• reduce resolution size of
photos prior to process & upload
GENERATING THE POINT CLOUD USING PHOTOSYNTH
the tower in the Photosynth browser
URL: http://photosynth.net/view.aspx?cid=0c14a64b-d223-4bb0-9c35-89a9b5c55e45
GENERATING THE POINT CLOUD USING PHOTOSYNTH
the PALACE area in THE Photosynth browser
URL: http://photosynth.net/view.aspx?cid=188b2b00-eebc-4e01-86b1-1842cecd17bd
GENERATING THE POINT CLOUD USING PHOTOSYNTH
Presentation (Photo: Ida Fasching)
further analysis using Autocad
User interface of the browseps-plugin
BROWSEPS:
• free AutoCAD Plugin• requires NET Framework 3.5
SP1• command ‘browseps’• stores a *.pcg file locally
further analysis using Autocad
User interface of SynthExport tool
BROWSEPS:
• free export tool• requires NET Framework 3.5
SP1• support for *.obj, *.ply, *vrml,
and *.x3d
further analysis using Autocad
POINT CLOUD of the tower Classified by height
further analysis using Autocad
POINT CLOUD of the tower Classified by height
further analysis using Autocad
POINT CLOUD of the tower Classified by height
further analysis using Autocad
orthogonal view of the tower & topography
further analysis using Autocad
orthogonal view of both sides of the tower
further analysis using Autocad
POINT CLOUD of the palace Classified by height
further analysis using Autocad
TWO SECTIONS DERIVED FROM THE POINTCLOUD
CONCLUSIONS
PRO:
• doesn’t require expensive or heavy equipment
• easy to use• fast results
CON:
• far less accurate and detailed then a 3D laser scanner
• difficulties with repetitive patterns and complex occlusions
• Linux and Mac OS are unsupported
• Needs (fast) internet connection
Ruben JOYE - [email protected] University College Ghent (Faculty School of Arts)
