Histogram equalization implementation in the preprocessing phase on optical character recognition

Pangestu, Peter and Gunawan, Dennis and Hansun, Seng (2017) Histogram equalization implementation in the preprocessing phase on optical character recognition. International Journal of Technology (IJTech), 8 (5).

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Abstract

A 2014 report from Digital Marketing Philippines stated that the number of web applications with visual content as their main product has increased significantly. Image processing technology has also undergone significant growth. One example of this is optical character recognition (OCR), which can convert the text on an image to plain text. However, a problem occurs when the image has low contrast and low exposure, which potentially results in information being hidden in the image. To address this problem, histogram equalization is used to enhance the image’s contrast so the hidden information can be shown. Similar to X-ray scanning used in the medical field, histogram equalization processes scanned images that have low brightness and low contrast. In this study, histogram equalization was successfully implemented using OCR preprocessing. The test was done with a dataset that contains dark background images with low light text; the successful outcome resulted in the ability to show 74.95% of the information hidden in the image.

Item Type: Article
Uncontrolled Keywords: Contrast enhancement; Histogram equalization; Image processing; Information hiding; Optical character recognition
Subjects: 000 Computer Science, Information and General Works > 000 Computer Science, Knowledge and Systems
000 Computer Science, Information and General Works > 000 Computer Science, Knowledge and Systems > 005 Computer Programming > 005.5 Applications / Software (Incl. Microsoft Office, presentation software, PDF reader)
Divisions: Fakultas Teknik Informatika > Program Studi Informatika
Depositing User: mr admin umn
Date Deposited: 30 Sep 2021 01:26
Last Modified: 22 Apr 2022 07:49
URI: http://kc.umn.ac.id/id/eprint/18444

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