The Ruby OCR SDK supports the Multi Receipts Detector 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::MultiReceiptsDetector::MultiReceiptsDetectorV1
)

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

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

Prediction
==========
:List of Receipts: Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.

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

Page 0
------
:List of Receipts: Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.
                   Polygon with 4 points.

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.

Attributes

The following fields are extracted for Multi Receipts Detector V1:

List of Receipts

receipts (Array<PositionField>): Positions of the receipts on the document.

for receipts_elem in result.document.inference.prediction.receipts do
  puts receipts_elem.polygon.to_s
    puts receipts_elem.quadrangle.to_s
    puts receipts_elem.rectangle.to_s
    puts receipts_elem.boundingBox.to_s
end

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