Curve Digitizer – Extracting Data from Datasheet Curves and Scientific Images
In progress
by giux 1 article last on October 15, 2026 0 comments
The Curve Digitizer pulls numbers out of curves that only exist as drawings: scanned datasheets, old plots, instrument screenshots, micrographs. It started as a standalone program and has become a GX-TXT viewer.
Inside GX-TXT the image is a Session Dataset, the digitization work lives in configurations stored in the Session (the viewer does not use workspaces), and the result is a Dataset with its provenance, which plots and the fitter read without reopening the digitizer.
Calibration is projective on four points, with an independent residual check and repeatable calibrations of the same plot. Curve families are published with their parameter value. For photographs and SEM images there is scale-bar calibration and image processing that leaves geometry untouched.
The version described here, viewer 1.2.17, will ship in GX-TXT release 0.9.8.10-dev-98 and is compatible with dev-96. It is not 100% complete, but barring bugs it is the version the framework will be released with.
The viewer will keep evolving, and this page collects the articles, manual and videos for each step. The full presentation is in the article Digitizing Datasheet Curves in GX-TXT: the Curve Digitizer Viewer; the videos are in the GX-TXT English playlist on YouTube.
Featured articles 1
- Oct 15, 2026 Digitizing Datasheet Curves in GX-TXT: the Curve Digitizer Viewer The Curve Digitizer inside GX-TXT: datasheet curves digitized within the framework, verifiable calibration and Datasets with provenance. It works with configurations, not workspaces. PDF…
Software used
- GX-TXT The framework the Curve Digitizer is a viewer of: source code on GitHub.
- Curve Digitizer (standalone program) The standalone version the viewer grew out of: image, calibration, points, CSV.
Documents and handouts
- Curve Digitizer – illustrated manual v1.2.17 (PDF) Two complete procedures (datasheet curve family and SEM image), settings reference, the module's internal manual and the public API specifications.
- GX-TXT documentation Framework guides: Sessions, Datasets, importers, plots, fitting.
Other files 1
- YouTube playlist GX-TXT – English English videos on GX-TXT, starting with the Curve Digitizer presentation.