How many types of invoices can be trained in one custom model?

Question

I have multiple types of invoices, with different layouts. Is it possible to train one single custom model with different types of invoice?

Or it is must to create a seperate custom model for each type of invoice?

Answer 1

Hello,

Thanks for reaching out to us.

A custom model ideally should be train with one type of samples to make sure the model can capture characters of the same type of invoices.

The more similar your model and the invoice you want to train are, the result of the recognition will be better.

What you may considerate is composed model, created by taking a collection of custom models and assigning them to a single model that encompasses your form types. When a document is submitted to a composed model, the service performs a classification step to decide which custom model accurately represents the form presented for analysis.

Technically you can train with multiple types of invoices, but the result will not be that correct.

I will suggest you use composed model and train different model with different types of invoices separately.

reference: https://learn.microsoft.com/en-us/azure/applied-ai-services/form-recognizer/concept-custom

Hope this will help. Please let us know if any further queries.

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