The Ruby OCR SDK supports the Passport API.

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

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::Passport::PassportV1
)

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

# Print the document-level parsed data
# puts result.document.inference.prediction

Output (RST):

########
Document
########
:Mindee ID: 18e41f6c-16cd-4f8e-8cd2-00ca02a35764
:Filename: default_sample.jpg

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

Prediction
==========
:Country Code: GBR
:ID Number: 707797979
:Given Name(s): HENERT
:Surname: PUDARSAN
:Date of Birth: 1995-05-20
:Place of Birth: CAMTETH
:Gender: M
:Date of Issue: 2012-04-22
:Expiry Date: 2017-04-22
:MRZ Line 1: P<GBRPUDARSAN<<HENERT<<<<<<<<<<<<<<<<<<<<<<<
:MRZ Line 2: 7077979792GBR9505209M1704224<<<<<<<<<<<<<<00

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

Page 0
------
:Country Code: GBR
:ID Number: 707797979
:Given Name(s): HENERT
:Surname: PUDARSAN
:Date of Birth: 1995-05-20
:Place of Birth: CAMTETH
:Gender: M
:Date of Issue: 2012-04-22
:Expiry Date: 2017-04-22
:MRZ Line 1: P<GBRPUDARSAN<<HENERT<<<<<<<<<<<<<<<<<<<<<<<
:MRZ Line 2: 7077979792GBR9505209M1704224<<<<<<<<<<<<<<00

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.

Date Field

Aside from the basic Field attributes, the date field DateField also implements the following:

• date_object (Date): an accessible representation of the value as a JavaScript object.

String Field

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

Attributes

The following fields are extracted for Passport V1:

Date of Birth

birth_date (DateField): The date of birth of the passport holder.

puts result.document.inference.prediction.birth_date.value

Place of Birth

birth_place (StringField): The place of birth of the passport holder.

puts result.document.inference.prediction.birth_place.value

Country Code

country (StringField): The country's 3 letter code (ISO 3166-1 alpha-3).

puts result.document.inference.prediction.country.value

Expiry Date

expiry_date (DateField): The expiry date of the passport.

puts result.document.inference.prediction.expiry_date.value

Gender

gender (StringField): The gender of the passport holder.

puts result.document.inference.prediction.gender.value

Given Name(s)

given_names (Array<StringField>): The given name(s) of the passport holder.

for given_names_elem in result.document.inference.prediction.given_names do
  puts given_names_elem.value
end

ID Number

id_number (StringField): The passport's identification number.

puts result.document.inference.prediction.id_number.value

Date of Issue

issuance_date (DateField): The date the passport was issued.

puts result.document.inference.prediction.issuance_date.value

MRZ Line 1

mrz1 (StringField): Machine Readable Zone, first line

puts result.document.inference.prediction.mrz1.value

MRZ Line 2

mrz2 (StringField): Machine Readable Zone, second line

puts result.document.inference.prediction.mrz2.value

Surname

surname (StringField): The surname of the passport holder.

puts result.document.inference.prediction.surname.value

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