Documentation

Check MICRLine Extraction

The Check MICRLine Extraction function reads the MICR (Magnetic Ink Character Recognition) line printed at the bottom of a bank check. It extracts key financial details such as the routing number, account number, check number, and word amount.

This function is commonly used in check-processing workflows to capture financial information directly from a check image. When executed, the function analyzes the image and returns a JSON output that includes each extracted value along with a confidence score (0 to 1), showing how accurately the text was recognized.

Steps to Configure:

1. Add a new step in the Use Case.
2. Select SET from the Action dropdown.
3. Leave the Screen Name field blank.
4. Enter a variable name in the Element Key field that will store the output.
   When you select the function for the first time, HuLoop auto-populates the Element Key as micrline. You may change this name if needed.
5. Click on Form, select Functions, and choose Check MICRLine Extraction from the dropdown.
6. Provide the required parameters:
   • file: Enter the full file path of the check image you want to process. (Example: C:\Checks\property_tax_check.jpg)
7. Click Save.

Outcome on Execution: On successful execution, the function extracts and returns several MICR-related details from the check, including:

• Routing Number
• Account Number
• Check Number
• Word Amount
• Confidence Score (0 to 1 for each extracted value)
• Position (the order of appearance in the MICR line)
• Error Flag (true/false)

The output is returned in JSON format and stored in the variable defined in the Element Key field.

You can reference these values in later steps using curly-brace syntax. For example:

${micrline.routing_number}

${micrline.account_number}

${micrline.check_number}

${micrline.word_amount}

Sample Output:

{

  “fname”: “ property_tax_check.jpg”,

  “routing_number”: {

    “content”: “063000047”,

    “confidence”: 0.84,

    “position”: 1

  },

  “account_number”: {

    “content”: “898055265222”,

    “confidence”: 0.84,

    “position”: 2

  },

  “check_number”: {

    “content”: “1922”,

    “confidence”: 0.84,

    “position”: 3

  },

  “word_amount”: {

    “content”: 1605.48,

    “confidence”: 0.26,

    “position”: null

  },

  “error”: false

}