A number of tools were assessed to produce photogrammetric models however two software alternatives were selected for assessment; one commercial – Agisoft Photoscan, and one open source – Autodesk Memento. The decision to use Agisoft Photoscan was based on careful assessments of pre-existing open source software packages and commercial options. A list of potential tools was gathered firstly by carrying out a detailed online search . This was followed by open discussion via social media platforms (i.e Twitter) with specialists in the area, taking their recommendations into consideration. Other software programmes were assessed as part of ongoing research into open source alternatives for local conservation groups and a description of those tools along with an assessment of their suitability were presented in an Appendix at the point of submission to the DAH programme in University College Cork.
Agisoft Photoscan is a particularly user friendly application and is relatively painless for the operator. It does however require a considerable amount of processing power to generate images above a certain quality. As a result two separate computers had to be used in the visualization process. Agisoft Photoscan was therefore used to produce the following models:
- St. Peter’s Church of Ireland, Drogheda, Co. Louth
- Triskel Christchurch, Cork City, Co. Cork
- Christchurch Cathedral, Waterford city
Autodesk Memento is a recent development and is described as an end-to-end solution to producing 3D models from a range of captured reality data (i.e. photographs or scans). This tool, though still in Beta, has proven to be an intuitive software that produced high quality models that can be hosted on a range of platforms. Autodesk Memento was assessed during the author’s involvement in a local community based photogrammetry project in Co. Roscommon. The results were of a high standard and as such it was decided to utilise the tool in relation to suitability for smaller scale heritage projects. Results of the community heritage project can be viewed on Sketchfab
- St. Brigid’s Church, Drogheda, Co. Louth.
- St. Coman’s church, Roscommon, Co. Roscommon