Invoice OCR .NET
The .NET OCR SDK supports the Invoice API.
Using the sample below, we are going to illustrate how to extract the data that we want using the OCR SDK.
Quick-Start
using Mindee;
using Mindee.Input;
using Mindee.Product.Invoice;
string apiKey = "my-api-key";
string filePath = "/path/to/the/file.ext";
// Construct a new client
MindeeClient mindeeClient = new MindeeClient(apiKey);
// Load an input source as a path string
// Other input types can be used, as mentioned in the docs
var inputSource = new LocalInputSource(filePath);
// Call the API and parse the input
var response = await mindeeClient
.ParseAsync<InvoiceV4>(inputSource);
// Print a summary of all the predictions
System.Console.WriteLine(response.Document.ToString());
// Print only the document-level predictions
// System.Console.WriteLine(response.Document.Inference.Prediction.ToString());
You can also call this product asynchronously:
using Mindee;
using Mindee.Input;
using Mindee.Product.Invoice;
string apiKey = "my-api-key";
string filePath = "/path/to/the/file.ext";
// Construct a new client
MindeeClient mindeeClient = new MindeeClient(apiKey);
// Load an input source as a path string
// Other input types can be used, as mentioned in the docs
var inputSource = new LocalInputSource(filePath);
// Call the product asynchronously with auto-polling
var response = await mindeeClient
.EnqueueAndParseAsync<InvoiceV4>(inputSource);
// Print a summary of all the predictions
System.Console.WriteLine(response.Document.ToString());
// Print only the document-level predictions
// System.Console.WriteLine(response.Document.Inference.Prediction.ToString());
Output (RST):
########
Document
########
:Mindee ID: 372d9d08-59d8-4e1c-9622-06648c1c238b
:Filename: default_sample.jpg
Inference
#########
:Product: mindee/invoices v4.7
:Rotation applied: Yes
Prediction
==========
:Locale: en; en; CAD;
:Invoice Number: 14
:Reference Numbers: AD29094
:Purchase Date: 2018-09-25
:Due Date:
:Total Net: 2145.00
:Total Amount: 2608.20
:Total Tax: 193.20
:Taxes:
+---------------+--------+----------+---------------+
| Base | Code | Rate (%) | Amount |
+===============+========+==========+===============+
| | | 8.00 | 193.20 |
+---------------+--------+----------+---------------+
:Supplier Payment Details:
:Supplier Name: TURNPIKE DESIGNS
:Supplier Company Registrations:
:Supplier Address: 156 University Ave, Toronto ON, Canada, M5H 2H7
:Supplier Phone Number: 4165551212
:Supplier Website:
:Supplier Email: [email protected]
:Customer Name: JIRO DOI
:Customer Company Registrations:
:Customer Address: 1954 Bloor Street West Toronto, ON, M6P 3K9 Canada
:Customer ID:
:Shipping Address:
:Billing Address: 1954 Bloor Street West Toronto, ON, M6P 3K9 Canada
:Document Type: INVOICE
:Line Items:
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| Description | Product code | Quantity | Tax Amount | Tax Rate (%) | Total Amount | Unit of measure | Unit Price |
+======================================+==============+==========+============+==============+==============+=================+============+
| Platinum web hosting package Down... | | 1.00 | | | 65.00 | | 65.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| 2 page website design Includes ba... | | 3.00 | | | 2100.00 | | 2100.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| Mobile designs Includes responsiv... | | 1.00 | | | 250.00 | 1 | 250.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
Page Predictions
================
Page 0
------
:Locale: en; en; CAD;
:Invoice Number: 14
:Reference Numbers: AD29094
:Purchase Date: 2018-09-25
:Due Date:
:Total Net: 2145.00
:Total Amount: 2608.20
:Total Tax: 193.20
:Taxes:
+---------------+--------+----------+---------------+
| Base | Code | Rate (%) | Amount |
+===============+========+==========+===============+
| | | 8.00 | 193.20 |
+---------------+--------+----------+---------------+
:Supplier Payment Details:
:Supplier Name: TURNPIKE DESIGNS
:Supplier Company Registrations:
:Supplier Address: 156 University Ave, Toronto ON, Canada, M5H 2H7
:Supplier Phone Number: 4165551212
:Supplier Website:
:Supplier Email: [email protected]
:Customer Name: JIRO DOI
:Customer Company Registrations:
:Customer Address: 1954 Bloor Street West Toronto, ON, M6P 3K9 Canada
:Customer ID:
:Shipping Address:
:Billing Address: 1954 Bloor Street West Toronto, ON, M6P 3K9 Canada
:Document Type: INVOICE
:Line Items:
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| Description | Product code | Quantity | Tax Amount | Tax Rate (%) | Total Amount | Unit of measure | Unit Price |
+======================================+==============+==========+============+==============+==============+=================+============+
| Platinum web hosting package Down... | | 1.00 | | | 65.00 | | 65.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| 2 page website design Includes ba... | | 3.00 | | | 2100.00 | | 2100.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
| Mobile designs Includes responsiv... | | 1.00 | | | 250.00 | 1 | 250.00 |
+--------------------------------------+--------------+----------+------------+--------------+--------------+-----------------+------------+
Field Types
Standard Fields
These fields are generic and used in several products.
BaseField
Each prediction object contains a set of fields that inherit from the generic BaseField
class.
A typical BaseField
object will have the following attributes:
- Confidence (
double?
): the confidence score of the field prediction. - BoundingBox (
BoundingBox
): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document. - Polygon (
Polygon
): contains the relative vertices coordinates (Polygon
extendsList<Point>
) of a polygon containing the field in the image. - PageId (
int?
): the ID of the page, alwaysnull
when at document-level.
Note: A
Point
simply refers to a List ofdouble
.
Aside from the previous attributes, all basic fields have access to a custom ToString
method that can be used to print their value as a string.
AmountField
An amount field AmountField
extends BaseField
, but also implements:
- Value (
double?
): corresponds to the field value. Can benull
if no value was extracted.
ClassificationField
The classification field ClassificationField
extends BaseField
, but also implements:
- Value (
strong
): corresponds to the field value.
Note: a classification field's
value is always a
string`.
CompanyRegistration
Aside from the basic BaseField
attributes, the company registration field CompanyRegistration
also implements the following:
- Type (
string
): the type of company. - Value (
string
): corresponds to the field value. - ToTableLine(): a method that formats the data to fit in a .rst display.
StringField
The text field StringField
extends BaseField
, but also implements:
- Value (
string
): corresponds to the field value. - RawValue (
string
): corresponds to the raw value as it appears on the document.
DateField
The date field DateField
extends StringField
, but also implements:
- DateObject (
DateTime?
): an accessible representation of the value as a C# object. Can benull
.
Locale
The locale field Locale
extends BaseField
, but also implements:
- Language (
string
): ISO 639-1 language code (e.g.:en
for English). Can benull
. - Country (
string
): ISO 3166-1 alpha-2 or ISO 3166-1 alpha-3 code for countries (e.g.:GRB
orGB
for "Great Britain"). Can benull
. - Currency (
string
): ISO 4217 code for currencies (e.g.:USD
for "US Dollars"). Can benull
.
PaymentDetail
The payment details field PaymentDetail
extends BaseField
, but it also implements:
- AccountNumber (
string
): number of an account, expressed as a string. Can benull
. - Iban (
string
): International Bank Account Number. Can benull
. - RoutingNumber (
string
): routing number of an account. Can benull
. - Swift (
string
): the account holder's bank's SWIFT Business Identifier Code (BIC). Can benull
.
Taxes
Tax
Aside from the basic BaseField
attributes, the tax field Tax
also implements the following:
- Rate (
double?
): the tax rate applied to an item expressed as a percentage. Can benull
. - Code (
string
): tax code (or equivalent, depending on the origin of the document). - Base (
double
): base amount used for the tax. Can benull
. - Value (
double
): the value of the tax. Can benull
.
Note: currently
Tax
is not used on its own, and is accessed through a parentTaxes
object, a list-like structure.
Taxes (List)
The Taxes
field represents a List of Tax
objects. As it is the representation of several objects, it has access to a custom ToString
method that can render a Tax
object as a table line.
Specific Fields
Fields which are specific to this product; they are not used in any other product.
Line Items Field
List of line item details.
A InvoiceV4LineItem
implements the following attributes:
- Description (
string
): The item description. - ProductCode (
string
): The product code referring to the item. - Quantity (
double
): The item quantity - TaxAmount (
double
): The item tax amount. - TaxRate (
double
): The item tax rate in percentage. - TotalAmount (
double
): The item total amount. - UnitMeasure (
string
): The item unit of measure. - UnitPrice (
double
): The item unit price.
Attributes
The following fields are extracted for Invoice V4:
Billing Address
BillingAddress: The customer's address used for billing.
System.Console.WriteLine(result.Document.Inference.Prediction.BillingAddress.Value);
Customer Address
CustomerAddress: The address of the customer.
System.Console.WriteLine(result.Document.Inference.Prediction.CustomerAddress.Value);
Customer Company Registrations
CustomerCompanyRegistrations: List of company registrations associated to the customer.
foreach (var CustomerCompanyRegistrationsElem in result.Document.Inference.Prediction.CustomerCompanyRegistrations)
{
System.Console.WriteLine(CustomerCompanyRegistrationsElem.Value);
}
Customer ID
CustomerId: The customer account number or identifier from the supplier.
System.Console.WriteLine(result.Document.Inference.Prediction.CustomerId.Value);
Customer Name
CustomerName: The name of the customer or client.
System.Console.WriteLine(result.Document.Inference.Prediction.CustomerName.Value);
Purchase Date
Date: The date the purchase was made.
System.Console.WriteLine(result.Document.Inference.Prediction.Date.Value);
Document Type
DocumentType: One of: 'INVOICE', 'CREDIT NOTE'.
Possible values include:
- INVOICE
- CREDIT NOTE
System.Console.WriteLine(result.Document.Inference.Prediction.DocumentType.Value);
Due Date
DueDate: The date on which the payment is due.
System.Console.WriteLine(result.Document.Inference.Prediction.DueDate.Value);
Invoice Number
InvoiceNumber: The invoice number or identifier.
System.Console.WriteLine(result.Document.Inference.Prediction.InvoiceNumber.Value);
Line Items
LineItems(List<InvoiceV4LineItem>): List of line item details.
foreach (var LineItemsElem in result.Document.Inference.Prediction.LineItems)
{
System.Console.WriteLine(LineItemsElem.Value);
}
Locale
Locale: The locale detected on the document.
System.Console.WriteLine(result.Document.Inference.Prediction.Locale.Value);
Reference Numbers
ReferenceNumbers: List of Reference numbers, including PO number.
foreach (var ReferenceNumbersElem in result.Document.Inference.Prediction.ReferenceNumbers)
{
System.Console.WriteLine(ReferenceNumbersElem.Value);
}
Shipping Address
ShippingAddress: Customer's delivery address.
System.Console.WriteLine(result.Document.Inference.Prediction.ShippingAddress.Value);
Supplier Address
SupplierAddress: The address of the supplier or merchant.
System.Console.WriteLine(result.Document.Inference.Prediction.SupplierAddress.Value);
Supplier Company Registrations
SupplierCompanyRegistrations: List of company registrations associated to the supplier.
foreach (var SupplierCompanyRegistrationsElem in result.Document.Inference.Prediction.SupplierCompanyRegistrations)
{
System.Console.WriteLine(SupplierCompanyRegistrationsElem.Value);
}
Supplier Email
SupplierEmail: The email of the supplier or merchant.
System.Console.WriteLine(result.Document.Inference.Prediction.SupplierEmail.Value);
Supplier Name
SupplierName: The name of the supplier or merchant.
System.Console.WriteLine(result.Document.Inference.Prediction.SupplierName.Value);
Supplier Payment Details
SupplierPaymentDetails: List of payment details associated to the supplier.
foreach (var SupplierPaymentDetailsElem in result.Document.Inference.Prediction.SupplierPaymentDetails)
{
System.Console.WriteLine(SupplierPaymentDetailsElem.Value);
}
Supplier Phone Number
SupplierPhoneNumber: The phone number of the supplier or merchant.
System.Console.WriteLine(result.Document.Inference.Prediction.SupplierPhoneNumber.Value);
Supplier Website
SupplierWebsite: The website URL of the supplier or merchant.
System.Console.WriteLine(result.Document.Inference.Prediction.SupplierWebsite.Value);
Taxes
Taxes: List of tax line details.
foreach (var TaxesElem in result.Document.Inference.Prediction.Taxes)
{
System.Console.WriteLine(TaxesElem.Value);
}
Total Amount
TotalAmount: The total amount paid: includes taxes, tips, fees, and other charges.
System.Console.WriteLine(result.Document.Inference.Prediction.TotalAmount.Value);
Total Net
TotalNet: The net amount paid: does not include taxes, fees, and discounts.
System.Console.WriteLine(result.Document.Inference.Prediction.TotalNet.Value);
Total Tax
TotalTax: The total tax: includes all the taxes paid for this invoice.
System.Console.WriteLine(result.Document.Inference.Prediction.TotalTax.Value);
Questions?
Updated 23 days ago