Extract invoice data

[yackinn]

Dear ml5 community,

I'm submitting a new issue. Please see the details below.

→ Step 1: Describe the issue 📝

Did you find a bug? Want to suggest an idea for feature? This is a feature idea. The specific use case is extracting data from invoices/receipts such as total_amount, issuer, line_items, ... Maybe this is already possible with the current feature set of ml5.

→ Step 2: Screenshots or Relevant Documentation 🖼

Here's some helpful screenshots and/or documentation of the new feature

{
	"total_amount": 169.95,
	"currency": "USD",
	"issuer": "Your Company",
	"address": {
		...
	},
	"line_items": [
		{
			"description": "services",
			"price": 55,
			"quantity": 10,
			"amount": 550
		}
	],
	...
}

→ Step 3: Share an example of the issue 🦄

This sample doesn't provide the described functionality entirely but it has a similar use case. https://github.com/naiveHobo/InvoiceNet