ezDIC

A lightweight virtual extensometer for extracting linear strain from image sequences.

Tracks two user-defined ROI markers across an image sequence and exports engineering strain, true strain, QC, and Origin-compatible TXT (optional OPJU). For researchers who need a reliable 1D strain history without full-field DIC.

Developed by Dr. Delun Gong · DOI 10.5281/zenodo.20222465

You need	ezDIC provides
Fast 1D strain	Two-ROI virtual extensometer
Honest failed frames	NaN instead of silent interpolation
Lab plotting	Origin-compatible TXT; optional OPJU
Multiple gauges	Mean ± SD / SEM; Poisson-ratio roles
No Python for users	Portable Windows folder with ezDIC.exe

Load images  →  Draw two ROIs  →  Track  →  Export strain + QC

Outputs

core/   strain_*.txt · optional OPJU · strain plots
qc/     qc_summary.txt
optional/  publication_figures/

Primary TXT:

Frame	EngineeringStrain	TrueStrain

engineering strain = (L - L0) / L0
true strain        = ln(L / L0)
PoissonRatio       = - ε_transverse / ε_axial   (engineering)

Failed tracking frames stay NaN. Poisson uses role-averaged groups; tiny axial magnitude → NaN.

Windows quick start

1. Download ezDIC_Windows_x64_v0.1.3.zip from releases
2. Extract full folder · keep _internal/ next to ezDIC.exe
3. Run ezDIC.exe · Windows 10/11 x64

py -m venv .venv
.\.venv\Scripts\python.exe -m pip install -r requirements.txt
.\.venv\Scripts\python.exe dic_virtual_extensometer_gui_v7_multi_roi_range.py

Build: powershell -File .\build_release.ps1 · Tests: py -m pytest -q

Limitations

Not full-field DIC — no strain maps, displacement fields, or local heterogeneity.

Cite

Gong, D. (2026). ezDIC (v0.1.3). Zenodo. https://doi.org/10.5281/zenodo.20222465

See CITATION.cff, NOTICE_Attribution_and_Usage.txt, and LICENSE.txt for attribution and redistribution terms.