Scanning the oak tree
Data for the production of the Bronze Oak has already been gathered and processed. Two methods were used when four members of Factum Arte carried out a photogrammetric recording of the Signing Oak tree at Windsor Great Park over the course of four days in April 2016:
Over five thousand 50 MB photographs with a 90% overlap were taken with two Canon 5DSR cameras and two lenses (Canon 100-400 mm. and Sigma 50 mm).
• The Faro Scanner:
The Faro is a mid-range lidar scanner that can record general shapes accurately but cannot record the fine details of the bark and twigs. To make the bronze tree Factum will use data from both the Faro and photogrammetry.
The 90% overlap between each captured image will allow a team of experts in photogrammetry from Factum Arte to generate an accurate, textured, three-dimensional model using Reality Capture software.
For more information about the making of the making of the bronze oak tree please visit the website from Factum Arte.
Adam Lowe at Factum Arte has pioneered a series of remarkable techniques using new scanning and 3d printing technology which has made it possible to scan this 900 year old oak tree without ever touching it. Doing all the photogrammetry took more than three days, recording over 5000 50mb photos.