Generating a point cloud from a crowdsourced photographic survey Ruben JOYE - ruben.joye@hogent.be Lecturer University College Ghent (Faculty School of Arts) THURSDAY, 31 MAY 2012-16U00 - TEACHING DIGITAL PLANNING METHODS
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
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 [0 1 ] Unidentified Building [0 2 ] Temple [P] Stadium [Q] Palace [R] Necropolis [S] Waterworks [T] Round Tower PLAN OF Sillyum (SOURCE: Bean G.E.)
Sillyum seen from Asar Koyu (photo: Bean G.E.) INTRODUCTION
Water source near lower gate (photo: Argyraspid) INTRODUCTION
Theatre (photo: Argyraspid) INTRODUCTION
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 test with a local chapel URL: http://photosynth.net/view.aspx?cid=515b5e37-9d99-4395-afcf-93295c425056
Exported pointcloud edited in Autocad INTRODUCTION
Le:Notre heritage group on the Sillyum site INTRODUCTION
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)
PHOTOGRAPHIC SURVEY PHOTO 099: TOWER FOTO 2: reutelbeek FOTO 3: Roeselarestraat PhOTO 239 TOWER Photo 359 tower SITE 1: tower
PHOTOGRAPHIC SURVEY PHOTO 059 PALACE PHOTO 290 PALACE FOTO 3: Roeselarestraat PhOTO 341 PALACE PHOTO 589 PALACe SITE 2: palace area
GENERATING THE POINT CLOUD USING 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 The easy to use interface of Photosynth
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 BROWSEPS: free AutoCAD Plugin requires NET Framework 3.5 SP1 command browseps stores a *.pcg file locally User interface of the browseps-plugin
further analysis using Autocad BROWSEPS: free export tool requires NET Framework 3.5 SP1 support for *.obj, *.ply, *vrml, and *.x3d User interface of SynthExport tool
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 - ruben.joye@hogent.be University College Ghent (Faculty School of Arts)