Acquisition

Description:
An amount of photos have been shot from different points of view by Nikon D90 Camera with 18-55mm lens, using an auto focus; average distance camera from the object is 1.50-2 mt with 2 reference distances of 3.5 cm.

Consists Of:
carrying out 3D data acquisition

Methods:
metric survey

Techniques:
structure from motion

Equipment:
Manfrotto tripod

Processing

Description:
the photos alignment has been performed by AgiSoft Photoscan Professional Edition in order to produce a dense points cloud ant to build a textured dense surface model.

Consists Of:
texturing
mesh noise removal
dense surface recostruction
photos alignment

Methods:
points triangulation
Scale-invariant feature transform approach
texture mapping

Techniques:
Feature matching across the photos and solving camera orientation parameters
Poisson Surface Reconstruction
generic mapping mode and mosaic blending mode
Mesh is cleaned up using the Relax and Remove Spikes command. The remaining errors are fixed through the Mesh Doctor function. The mesh has been exported as an obj file .

Equipment:
Meshlab 1.3.2
AgiSoft PhotoscanProfessional Edition 1.0.4
AgiSoft PhotoscanProfessional Edition 1.0.4
Geomagic Studio 2013
AgiSoft PhotoscanProfessional Edition 1.0.4

Post-processing

Description:

Consists Of:
3D pdf production
mesh decimation
photo rendering

Methods:
the textured 3D model is exported to 3D pdf format
snapshot
Decimate command

Techniques:
Export command
Reduction mode is triangle count
image capture and export in jpg format

Materials:

Equipment:
AgiSoft Photoscan Professional Edition 1.0.4
Geomagic Studio 2013
Geomagic Studio 2013
Meshlab 1.3.2