The Java OCR SDK supports the Bank Check API.

Using the sample below, we are going to illustrate how to extract the data that we want using the OCR SDK.
Bank Check sample

Quick-Start

import com.mindee.MindeeClient;
import com.mindee.input.LocalInputSource;
import com.mindee.parsing.common.PredictResponse;
import com.mindee.product.us.bankcheck.BankCheckV1;
import java.io.File;
import java.io.IOException;

public class SimpleMindeeClient {

  public static void main(String[] args) throws IOException {
    String apiKey = "my-api-key";
    String filePath = "/path/to/the/file.ext";

    // Init a new client
    MindeeClient mindeeClient = new MindeeClient(apiKey);

    // Load a file from disk
    LocalInputSource inputSource = new LocalInputSource(filePath);

    // Parse the file
    PredictResponse<BankCheckV1> response = mindeeClient.parse(
        BankCheckV1.class,
        inputSource
    );

    // Print a summary of the response
    System.out.println(response.toString());

    // Print a summary of the predictions
//  System.out.println(response.getDocument().toString());

    // Print the document-level predictions
//    System.out.println(response.getDocument().getInference().getPrediction().toString());

    // Print the page-level predictions
//    response.getDocument().getInference().getPages().forEach(
//        page -> System.out.println(page.toString())
//    );
  }

}

Output (RST):

########
Document
########
:Mindee ID: b9809586-57ae-4f84-a35d-a85b2be1f2a2
:Filename: default_sample.jpg

Inference
#########
:Product: mindee/bank_check v1.0
:Rotation applied: Yes

Prediction
==========
:Check Issue Date: 2022-03-29
:Amount: 15332.90
:Payees: JOHN DOE
         JANE DOE
:Routing Number:
:Account Number: 7789778136
:Check Number: 0003401

Page Predictions
================

Page 0
------
:Check Position: Polygon with 21 points.
:Signature Positions: Polygon with 6 points.
:Check Issue Date: 2022-03-29
:Amount: 15332.90
:Payees: JOHN DOE
         JANE DOE
:Routing Number:
:Account Number: 7789778136
:Check Number: 0003401

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 (Polygon): 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 extends List<Point>) of a polygon containing the field in the image.
pageId (Integer): the ID of the page, always null when at document-level.

Note: A Point simply refers to a List of Double.

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 be null if no value was extracted.

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 BaseField, but also implements:

value (LocalDate): an accessible representation of the value as a Java object. Can be null.

PositionField

The position field PositionField implements:

boundingBox (Polygon): 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 extends List<Point>) of a polygon containing the field in the image.
rectangle (Polygon): a polygon with four points that may be oriented (even beyond canvas).
quadrangle (Polygon): a free polygon made up of four points.

Page-Level Fields

Some fields are constrained to the page level, and so will not be retrievable at document level.

Attributes

The following fields are extracted for Bank Check V1:

Account Number

accountNumber: The check payer's account number.

System.out.println(result.getDocument().getInference().getPrediction().getAccountNumber().value);

Amount

amount: The amount of the check.

System.out.println(result.getDocument().getInference().getPrediction().getAmount().value);

Check Number

checkNumber: The issuer's check number.

System.out.println(result.getDocument().getInference().getPrediction().getCheckNumber().value);

Check Position

📄checkPosition: The position of the check on the document.

for (PositionField checkPositionElem : result.getDocument().getInference().getPrediction().getCheckPosition())
{
    System.out.println(checkPositionElem).polygon;
}

Check Issue Date

date: The date the check was issued.

System.out.println(result.getDocument().getInference().getPrediction().getDate().value);

Payees

payees: List of the check's payees (recipients).

for (payeesElem : result.getDocument().getInference().getPrediction().getPayees())
{
    System.out.println(payeesElem.value);
}

Routing Number

routingNumber: The check issuer's routing number.

System.out.println(result.getDocument().getInference().getPrediction().getRoutingNumber().value);

Signature Positions

📄signaturesPositions: List of signature positions

for (Page page : result.getDocument().getInference().getPages())
{
    for (PositionField  signaturesPositionsElem : page.getSignaturesPositions())
    {
        System.out.println(signaturesPositionsElem.polygon);
        System.out.println(signaturesPositionsElem.quadrangle);
        System.out.println(signaturesPositionsElem.rectangle);
        System.out.println(signaturesPositionsElem.boundingBox);
    }
}

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