Capture Signatures from different documents using Azure Document Intelligence

Question

I have a requirement wherein I need to capture the signatures of people from different documents and have that signature verified against a database of signatures to verify if the signatures are fake or not.

Can Azure AI Document Intelligence capture signatures from different documents? Can we use Azure Computer Vision image classification to check if the signature is a valid one against the signatures in the database?

Answer 1

Hi @Ziggy Zulueta

To capture signatures and perform signature verification, you would need a specialized solution that is designed for signature analysis and verification. Azure AI Document Intelligence can be used to extract text and other information from documents, but it doesn't provide signature verification features and Computer Vision primarily focuses on document processing, but they do not offer built-in signature verification capabilities.

Find the below link for more info on custom vision and its capabilities.

https://learn.microsoft.com/en-us/search/?terms=custom%20vision

If you find this answer useful kindly accept thanks much.

Answer 2

Hello @Ziggy Zulueta , Thanks for using Microsoft Q&A Platform.

Adding more details to the @Azar response.

Azure AI Document Intelligence can detect signatures in the documents using the document intelligence custom template model. However, Signature field (field type) in custom models generally detects if a signature exists in the specified field and returns value as signed/unsigned. However, it cannot capture/verify if the signature is fake or not against a database of signatures.

The Custom Vision service works well to analyze images, but your use case may not fit with this: https://learn.microsoft.com/en-us/azure/ai-services/custom-vision-service/getting-started-build-a-classifier

My suggestion is you can use the Document intelligence model to detect the signature but still post processing steps are required to verify and extract signature as per your requirement.

I hope this helps.

Regards,
Vasavi