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Scotland: Cupar, town centre 3D Model
An entry for the Final Round of the 3Dflow World Cup 2019.
Model type: urban; large-scale, low-detail.
I was interested in gauging the capacity of 3DF Zephyr for working with large data sets. In this case the data set was >6,500 DSLR photos, all ground-based capture.
There are 2 issues with exclusively ground-based capture: 1) angle of sensor (DSLR camera) relative to subject (buildings) means that ground surfaces (roads+pavements) are at glancing angle, so more reflective/shiny, less likely to be detected in software; 2) all surfaces which are hidden from view as pedestrian (e.g. roofs, window sills) are also absent from the final model. Compounding issue with pitched roofs is their angle relative to pedestrian (i.e. angled, so reflective/shiny, as with 1).
Both limitations - limited ground and roofs - are present here.
3D reconstruction produced in 3DF Zephyr v4.507 from 6518 images