HDCD-materials: Holographic droplet collision detection

Evaluation code, trained models and numerical data for Semi-automated detection of droplet collision-coalescence using digital in-line holography. Includes deterministic generation of six paired-hologram sequences, particle measurement and tracking, fitting of three collision models, Tables 4–5, Figures 4–5 and 7–15, 1,120 reviewed experimental candidates and ten confirmed collision image sequences. Full experimental raw holograms are excluded. Numerical research data use CC BY 4.0; project software and collision-model weights use MIT. Third-party components retain their own licenses.