Support the spread of “good practice” in generating, managing, analysing and communicating spatial information

Data Capture Using Digital Photography

By: Giacomo Rambaldi and Jeroen verplanke

Unit: M10U04

Flow of the presentation

• Equipment needed• Preparing the model for data extraction• Capturing data using digital photography

Equipment needed

• High resolution digital single lens reflex (SLR) camera

• Top quality lens with adjustable zoom and manual zoom and focus options

• Tripod• Plumb line• Coloured yarns• Nails / push pins

Preparing the model for data extraction

• Place a grid on the 3D model

Image courtesy Giacomo Rambaldi/ARCBC

Preparing the model for data extraction

• Tilt the model• Prepare the shooting

environment

Images courtesy Giacomo Rambaldi/CTA

Data capture

• Parallel camera movement

Mov

emen

t of t

he

Dig

ital C

amer

a

3D m

odel

4 m distance

Image courtesy G. Rambaldi/ARCBC

Sequence of images

Camera movement

Sample of extracted images

Images courtesy Giacomo Rambaldi