This prototype detects calibration charts and similar items in cultural heritage images. It uses a small, fine-tuned object detection model that runs directly in your web browser. Click below to start a one-time download of the model (~25MB).

01

Add images

Paste a IIIF manifest URL in the sidebar. You can also upload a single image to try out the tool.

02

Detect

Detection starts automatically, and runs in your browser.

03

Use the result

Get suggested crops for images and copy, export or share the outputs via the IIIF APIs.

Or try an example

All inference runs in the browser — any uploaded images never leave your device.

Detection accuracy can vary — try adjusting the confidence slider lower if charts are missed, or higher if you get false positives.

Questions? iiif@cogapp.comCogapp