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Automated Data Digitization System for Vehicle Registration Certificates Using Google Cloud Vision API

Karanrat Thammarak, Yaowarat Sirisathitkul, Prateep Kongkla, Sarun Intakosum

Abstract


This study aims to develop an automated data digitization system for the Thai vehicle registration certificate. It is the first system developed as a web service Application Programming Interface (API), which is essential for any enterprise to increase its business value. Currently, this system is available on “www.carjaidee.com”. The system involves four steps: 1) an embedded frame aligns a document to be correctly recognised in the image acquisition step; 2) sharpening and brightness filtering techniques to enhance image quality are applied in the pre-processing step; 3) the Google Cloud Vision API receives a prompt to proceed in the recognition step; 4) a specific domain dictionary to improve accuracy rate is developed for the post-processing step. This study defines 92 images for the experiment by counting the correct words and terms from the output. The findings suggest that the proposed method, which had an average accuracy of 93.28%, was significantly more accurate than the original method using only the Google Cloud Vision API. However, the system is limited because the dictionaries cannot automatically recognise a new word. In the future, we will explore solutions to this problem using natural language processing techniques.

 

Doi: 10.28991/CEJ-2022-08-07-09

Full Text: PDF


Keywords


Thai Vehicle Registration Certificates; Optical Character Recognition; Google Cloud Vision; Service; API; Transportation.

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Full Text: PDF

DOI: 10.28991/CEJ-2022-08-07-09

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Copyright (c) 2022 Karanrat Thammarak, Yaowarat Sirisathitkul, Prateep Kongkla, Sarun Intakosum

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