COLMAP demonstration (2021-01-24)

Описание

Video demonstrating use of COLMAP software.

COLMAP is a software by Johannes L. Schönberger, further information is available at https://demuc.de/colmap/ and https://colmap.github.io/index.html

Video shows use of COLMAP to produce a Sparse, which is then transferred across to Agisoft Metashape for rendering a Dense.

In COLMAP:
1) New Project (then fill in fields accordingly) - this establishes a DB file;
2) Save Project (additional step) - this establishes an INI file;
3) Feature Extraction, then Feature Matching (vocabtree is used during this demonstration), then Reconstruction - these steps culminate in the production of a Sparse;
4) Export Model - this saves the Sparse, which is otherwise lost if at this point COLMAP is closed, i.e. the Sparse generated in step 3 has to be manually saved/exported.

Optionally, if exporting the Sparse to be used in Agisoft Metashape:
5) Export Model As ... - export in Bundler/OUT format;
6) in Metashape, import images;
7) File, Import, Import Cameras... - select Bundler file, then in subsequent dialogue select corresponding text/TXT file.

Note: running COLMAP on Windows requires pre-installed dependencies. My personal way of 'installing' these dependencies is to separately install AMD's Ryzen Master (which is a software that requires similar dependencies, and installs those dependencies as part of its own installation process - method valid as of 2021-01-24, using Ryzen Master version 2.0.6.1702, downloaded from https://www.amd.com/en/technologies/ryzen-master ).