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Perform OCR using Google's Drive API v3

Google OCR (Drive API v3)

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Perform OCR using Google's Drive API v3

  • Free software: GNU General Public License v3
  • Documentation: https://google-drive-ocr.readthedocs.io.

Features

  • Perform OCR using Google's Drive API v3
  • Class GoogleOCRApplication() for use in projects
  • Highly configurable CLI
  • Run OCR on a single image file
  • Run OCR on multiple image files
  • Run OCR on all images in directory
  • Use multiple workers (multiprocessing)
  • Work on a PDF document directly

Usage

Using in a Project

Create a GoogleOCRApplication application instance:

from google_drive_ocr import GoogleOCRApplication

app = GoogleOCRApplication('client_secret.json')
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Perform OCR on a single image:

app.perform_ocr('image.png')
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Perform OCR on mupltiple images:

app.perform_batch_ocr(['image_1.png', 'image_2.png', 'image_3.png'])
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Perform OCR on multiple images using multiple workers (multiprocessing):

app.perform_batch_ocr(['image_1.png', 'image_3.png', 'image_2.png'], workers=2)
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Using Command Line Interface

Typical usage with…

View on GitHub

Google's Drive API can be used to perform OCR on images from any language. google-drive-ocr is a python package that allows users to do this with utmost ease, right from the terminal.

  • Free software: GNU General Public License v3
  • Documentation: https://google-drive-ocr.readthedocs.io.

Features

  • Perform OCR using Google's Drive API v3
  • Class GoogleOCRApplication() for use in projects
  • Highly configurable CLI
  • Run OCR on a single image file
  • Run OCR on multiple image files
  • Run OCR on all images in directory
  • Use multiple workers (multiprocessing)
  • Work on a PDF document directly

Install

To install Google OCR (Drive API v3), run this command in your terminal:

pip install google-drive-ocr
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Note: One must setup a Google application and download client_secrets.json file before using google_drive_ocr.

Setup

  • Create a project on Google Cloud Platform
  • Wizard: https://console.developers.google.com/start/api?id=drive

Instructions

  • https://cloud.google.com/genomics/downloading-credentials-for-api-access
  • Select application type as "Installed Application"
  • Create credentials "OAuth consent screen" --> "OAuth client ID"
  • Save client_secret.json

Usage

Using in a Project

Create a GoogleOCRApplication application instance:

from google_drive_ocr import GoogleOCRApplication

app = GoogleOCRApplication('client_secret.json')
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Perform OCR on a single image:

app.perform_ocr('image.png')
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Perform OCR on mupltiple images:

app.perform_batch_ocr(['image_1.png', 'image_2.png', 'image_3.png'])
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Perform OCR on multiple images using multiple workers (multiprocessing):

app.perform_batch_ocr(['image_1.png', 'image_3.png', 'image_2.png'], workers=2)
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Using Command Line Interface

Typical usage with several options:

google-ocr --client-secret client_secret.json \
--upload-folder-id <google-drive-folder-id>  \
--image-dir images/ --extension .jpg \
--workers 4 --no-keep
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Show help message with the full set of options:

google-ocr --help
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Configuration

The default location for configuration is ~/.gdo.cfg.
If configuration is written to this location with a set of options,
we don't have to specify those options again on the subsequent runs.

Save configuration and exit:

google-ocr --client-secret client_secret.json --write-config ~/.gdo.cfg
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Read configuration from a custom location (if it was written to a custom location):

google-ocr --config ~/.my_config_file ..
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Performing OCR

Note: It is assumed that the client-secret option is saved in configuration file.

Single image file:

google-ocr -i image.png
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Multiple image files:

google-ocr -b image_1.png image_2.png image_3.png
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All image files from a directory with a specific extension:

google-ocr --image-dir images/ --extension .png
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Multiple workers (multiprocessing):

google-ocr -b image_1.png image_2.png image_3.png --workers 2
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PDF files:

google-ocr --pdf document.pdf --pages 1-3 5 7-10 13
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