The Ruby OCR SDK supports the W9 API.

Using the sample below, we are going to illustrate how to extract the data that we want using the OCR SDK.
W9 sample

Quick-Start

require 'mindee'

# Init a new client
mindee_client = Mindee::Client.new(api_key: 'my-api-key')

# Load a file from disk
input_source = mindee_client.source_from_path('/path/to/the/file.ext')

# Parse the file
result = mindee_client.parse(
  input_source,
  Mindee::Product::US::W9::W9V1
)

# Print a full summary of the parsed data in RST format
puts result.document

Output (RST):

########
Document
########
:Mindee ID: d7c5b25f-e0d3-4491-af54-6183afa1aaab
:Filename: default_sample.jpg

Inference
#########
:Product: mindee/us_w9 v1.0
:Rotation applied: Yes

Prediction
==========

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

Page 0
------
:Name: Stephen W Hawking
:SSN: 560758145
:Address: Somewhere In Milky Way
:City State Zip: Probably Still At Cambridge P O Box CB1
:Business Name:
:EIN: 942203664
:Tax Classification: individual
:Tax Classification Other Details:
:W9 Revision Date: august 2013
:Signature Position: Polygon with 4 points.
:Signature Date Position:
:Tax Classification LLC:

Field Types

Standard Fields

These fields are generic and used in several products.

Basic Field

Each prediction object contains a set of fields that inherit from the generic Field class.
A typical Field object will have the following attributes:

value (String, Float, Integer, Boolean): corresponds to the field value. Can be nil if no value was extracted.
confidence (Float, nil): the confidence score of the field prediction.
bounding_box (Mindee::Geometry::Quadrilateral, nil): contains exactly 4 relative vertices (points) coordinates of a right rectangle containing the field in the document.
polygon (Mindee::Geometry::Polygon, nil): contains the relative vertices coordinates (Point) of a polygon containing the field in the image.
page_id (Integer, nil): the ID of the page, always nil when at document-level.
reconstructed (Boolean): indicates whether an object was reconstructed (not extracted as the API gave it).

Aside from the previous attributes, all basic fields have access to a to_s method that can be used to print their value as a string.

Position Field

The position field PositionField does not implement all the basic Field attributes, only bounding_box, polygon and page_id. On top of these, it has access to:

rectangle (Mindee::Geometry::Quadrilateral): a Polygon with four points that may be oriented (even beyond canvas).
quadrangle (Mindee::Geometry::Quadrilateral): a free polygon made up of four points.

String Field

The text field StringField only has one constraint: it's value is a String (or nil).

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 W9 V1:

Address

📄address (StringField): The street address (number, street, and apt. or suite no.) of the applicant.

for address_elem in result.document.address do
  puts address_elem.value
end

Business Name

📄business_name (StringField): The business name or disregarded entity name, if different from Name.

for business_name_elem in result.document.business_name do
  puts business_name_elem.value
end

City State Zip

📄city_state_zip (StringField): The city, state, and ZIP code of the applicant.

for city_state_zip_elem in result.document.city_state_zip do
  puts city_state_zip_elem.value
end

EIN

📄ein (StringField): The employer identification number.

for ein_elem in result.document.ein do
  puts ein_elem.value
end

Name

📄name (StringField): Name as shown on the applicant's income tax return.

for name_elem in result.document.name do
  puts name_elem.value
end

Signature Date Position

📄signature_date_position (PositionField): Position of the signature date on the document.

for signature_date_position_elem in result.document.signature_date_position do
  puts signature_date_position_elem.polygon
end

Signature Position

📄signature_position (PositionField): Position of the signature on the document.

for signature_position_elem in result.document.signature_position do
  puts signature_position_elem.polygon
end

SSN

📄ssn (StringField): The applicant's social security number.

for ssn_elem in result.document.ssn do
  puts ssn_elem.value
end

Tax Classification

📄tax_classification (StringField): The federal tax classification, which can vary depending on the revision date.

for tax_classification_elem in result.document.tax_classification do
  puts tax_classification_elem.value
end

Tax Classification LLC

📄tax_classification_llc (StringField): Depending on revision year, among S, C, P or D for Limited Liability Company Classification.

for tax_classification_llc_elem in result.document.tax_classification_llc do
  puts tax_classification_llc_elem.value
end

Tax Classification Other Details

📄tax_classification_other_details (StringField): Tax Classification Other Details.

for tax_classification_other_details_elem in result.document.tax_classification_other_details do
  puts tax_classification_other_details_elem.value
end

W9 Revision Date

📄w9_revision_date (StringField): The Revision month and year of the W9 form.

for w9_revision_date_elem in result.document.w9_revision_date do
  puts w9_revision_date_elem.value
end

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