Hello @minhoo lee
Thanks for reaching out to us. I would recommend you to try Form Recognizer -
Signatures can now be detected in form fields in a custom form model. Signature field is a new field type in custom models that detects if a signature exists in the specified field. In addition to key value pairs, tables and selection marks you can now also train a model to detect signature in documents.
Labeling experience for signature field in custom forms
To learn more about signature detection, see custom and composed models: https://learn.microsoft.com/azure/applied-ai-services/form-recognizer/concept-custom#what-is-signature-field
I hope this helps, please let us know if you need more helps.
Regards,
Yutong
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