Technical Standards
All completed photomosaics and the outcomes of the field trial were examined to determine the equipment and techniques that performed best. These results were used to define the parameters (resolution, scale, etc.) that would optimize the quality of future photomosaic images. Subsequent work would be performed to the following standards:
Camera - Nikon D-100 digital
Lens - Nikon 18-35 mm f/3.5-4.5 lens
Image Size - 3008 X 2000 pixels
Image Type - Uncompressed NEF (Nikon RAW)
Camera Alignment – Normal to the plane of the facade
Camera Orientation - Portrait format (tall rather than wide)
Photographic Distance and Lens Focal Length – All photographs of a particular facade are taken at the same distance and with the lens at the same focal length:
Camera Distance Lens Focal
From Facade Length Setting
7m 26mm
6m 22mm
5m 18mm
<5m 18mm
Photographic Interval – Not greater than two meters
Control Background – Orthographic line drawing created from Total Station survey
Control Background and Photomosaic Resolution – 300 pixels per inch
Control Background and Photomosaic Scale – 1:25
Color Control – Kodak Q-13 Color Separation Guide
CAD Software – AutoCAD or VectorWorks
Image Editing Software - Photoshop
These standards were used to create a third photomosaic of Insula VI, 1 along via Consolare in 2006, and for all work on via dell’Abbondanza and other locations in Pompeii.