Your LimeSurvey version: Version 5.3.3
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Hello there is it possible to save an image generated from  github.com/szimek/signature_pad in JS code to the answer of the question? I could not find anything in the documentation about this. Which question type is suitable for this case? I know there is a question type file upload but how can I programmatically upload pictures? 

I'm using SignaturePad as a captcha to ensure that the answers a valid.