Image → CSV

Extract numerical curves from spectrum images

Choose automatic extraction for the fastest path, use the manual workbench when you want to trace or calibrate the figure yourself, or submit images and literature PDFs for backend human processing when you have a batch to digitize.

Automatic

Automatic extraction

Upload one spectrum image, review the overlay, correct a missed section when necessary, and export the recovered CSV.

Extract automatically

Self-service

Manual extraction

Open the advanced workbench to calibrate axes and trace the curve yourself when you want complete manual control.

Open manual extraction

Human service

Backend human processing

Upload many spectrum images or literature PDFs for the FTIR.fun team to digitize manually. Five credits are charged per submitted item; this human service is not included in subscriptions.

Submit a batch

Data use: Spectrum images and extracted curve data may be used to improve curve detection. They are not added to the FTIR.fun reference library. Privacy Policy

Preparing

Review

Automatic result

Automatic extraction comparison — Source / overlay / CSV redraw

Choose analysis data handling Public contribution — free
The spectrum enters the public library and may be used for model training. One free search per spectrum content, one submission per IP every 5 minutes, and truthful sample background are required. Private analysis — uses credits
The spectrum is not added to the library, not used for model training, and not shown to other users.

Adjust manually

Mark the correct curve

Draw over one section that the system missed or followed incorrectly. A rough stroke is enough — you do not need to trace the curve accurately.

Keep the stroke near the correct visible curve. The system uses it to understand the right region and how far the automatic trace drifted, then re-extracts from the original image.

Draw mode is active by default. Switch to Move image, drag the canvas, use the arrow buttons, or use the mouse wheel to inspect a local section; switch back before drawing.

Press and drag along the correct curve. One continuous stroke is enough.

If the automatic system still cannot follow the curve, open the advanced manual editor.