photogram

photogrammetry pipeline

Overview

Preparation

• a set of images from the same sample (.CR3)
  • a camera
  • a color checker
  • a turning table
  • a light box
• softwares:
  • Adobe DNG Converter (free, optional)
  • Adobe Lightroom (paid) OR DarkTable (free)
  • Helicon Focus (paid)
  • Agisoft Metashape (paid)

Procedures

1. photo capture
2. photo format convertion (optional) using Adobe DNG Converter
3. photo color calibration based on a color profile using Adobe Lightroom or DarkTable
4. photo clustering: divide photos based on rotations using Helicon Focus or enfuse
5. photo focus stacking: combine photos from the same rotation using python scripts
6. 3D model building using Agisoft Metashape
   • romove photo background
   • align photos from different rotations and angles
   • build mesh
   • build texture
   • scale models based on markers

Final outputs

Some Pedicularis floral 3D models

Detailed notes please refer to the wiki page.

Reference

Leménager, M., Burkiewicz, J., Schoen, D.J., Joly, S., 2022. Studying flowers in 3D using photogrammetry. New Phytol. nph.18553. https://doi.org/10.1111/nph.18553