semper
semper · Digital image correlation
Full-field deformation measurement using
only your phone
Paint a random speckle, photograph before and during loading, and read displacement and strain fields as interactive heatmaps — computed on the device, offline-first.
Digital image correlation on a phone — so a course or a research group can measure strain without a dedicated DIC system. Available on Android.
How it works
Built for courses and research groups
Digital image correlation watches a speckle pattern move between photos and turns that motion into full-field maps of how the surface stretched. semper runs that pipeline on the phone.
- Paint a random speckle on the specimen — a spray of dots the camera can track.
- Take a reference photograph, then more photographs while the specimen deforms.
- semper divides each image into small windows and finds where each window moved.
- Displacements (U, V) are turned into strain fields (Exx, Eyy, Exy) you can inspect as heatmaps.
There is no scale calibration in the app — convert pixels to physical units yourself. For experiment design, see the iDICs Good Practices Guide.
The app
Pick frames. Read fields.
Choose reference and deformed images. semper computes and presents displacement and strain as interactive heatmaps. Optional cloud sync is available for testers.
Docs and community
Manual, learning, and support
How to run an analysis, the terms the app uses, and where to get help — on this site.
Get in touch
Talk about semper
Early access for a course, a research group, or a first analysis. Write to us — new accounts are approved by an admin before the app opens.