Converting paper ECG into json?

could you please advice how to convert paper ECG into Json Plotly chart?

Hey @igorsha Welcome to the forums.

What exactly is the question? Convert the curves on paper to an array or list?

yes, is it possible? so I can use full Plotly functionality, and not putting image as background

This can be done, but you might be better of searching for help in a different forum. The plotting of the digital data with plotly is the easiest part.

agree, but maybe some one already did it

Have you looked at the paper at the first link below, and the open source code by its authors at the second?

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Thank - will try