Evaluation of optical character recognition algorithms and feature extraction techniques

2016 ◽  
Author(s):  
Syed Hassan Tanvir ◽  
Tamim Ahmed Khan ◽  
Abu Bakar Yamin
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Extraction Techniques ◽  
Optical Character ◽  
Recognition Algorithms

Handwritten Indic Script Identification in Multi-Script Document Images: A Survey

2018 ◽  
Vol 32 (10) ◽  
pp. 1856012 ◽  
Author(s):  
Sk. Md. Obaidullah ◽  
K. C. Santosh ◽  
Nibaran Das ◽  
Chayan Halder ◽  
Kaushik Roy
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Document Images ◽  
Extraction Techniques ◽  
Script Identification ◽  
Optical Character ◽  
Comprehensive Survey ◽  
Indic Script

Script identification is crucial for automating optical character recognition (OCR) in multi-script documents since OCRs are script-dependent. In this paper, we present a comprehensive survey of the techniques developed for handwritten Indic script identification. Different pre-processing and feature extraction techniques, including classifiers used for script identification, are categorized and their merits and demerits are discussed. We also provide information about some handwritten Indic script datasets. Finally, we highlight the extensions and/or future scope of works together with challenges.

scholarly journals Feature Extraction Techniques Based on Swarm Intelligence in OCR

2019 ◽  
Vol 8 (12) ◽  
pp. 13-19
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Feature Vector ◽  
Extraction Techniques ◽  
Optical Character ◽  
Readable Form ◽  
Machine Readable ◽  
Machine Readable Form ◽  
Recognition Technique

Optical Character Recognition is a most recent field in area of pattern recognition and machine learning in last decade. In this article, the suitable techniques are designated for better character recognition in document into machine readable form. It is belonging with Content Based Image Retrieval (CBIR) system, which solve the delinquent of searching images in huge dataset. The recognition technique of handwritten character is not developed efficiently till, because of variations in size, shape, style, slats etc. in writing skill of human being. To overcome such problems, the part of concentration is feature extraction and algorithm that take care of such variation. In this paper independent component analysis is used for extracting features. For feature vector selection particle swarm optimization and firefly algorithms are applied. It is observed that due to distributed neighborhood pixel of an image, the PSO gives better recognition rates.

RESEARCH ON CHINESE OCR IN TAIWAN

1991 ◽  
Vol 05 (01n02) ◽  
pp. 139-164 ◽  
Author(s):  
FANG-HSUAN CHENG ◽  
WEN-HSING HSU
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Chinese Character ◽  
Chinese Characters ◽  
Image Preprocessing ◽  
Large Sets ◽  
Basic Line ◽  
Optical Character ◽  
Taiwan Chinese

This paper describes typical research on Chinese optical character recognition in Taiwan. Chinese characters can be represented by a set of basic line segments called strokes. Several approaches to the recognition of handwritten Chinese characters by stroke analysis are described here. A typical optical character recognition (OCR) system consists of four main parts: image preprocessing, feature extraction, radical extraction and matching. Image preprocessing is used to provide the suitable format for data processing. Feature extraction is used to extract stable features from the Chinese character. Radical extraction is used to decompose the Chinese character into radicals. Finally, matching is used to recognize the Chinese character. The reasons for using strokes as the features for Chinese character recognition are the following. First, all Chinese characters can be represented by a combination of strokes. Second, the algorithms developed under the concept of strokes do not have to be modified when the number of characters increases. Therefore, the algorithms described in this paper are suitable for recognizing large sets of Chinese characters.

Sum of Squared Difference (SSD) Template Matching Testing on Writing Learning Application

2020 ◽  
Vol 8 (4) ◽  
pp. 453
Author(s):  
Widya Dharma Sidi ◽  
I Gede Arta Wibawa
Keyword(s):  
Early Childhood ◽  
Feature Extraction ◽  
Mobile Learning ◽  
Character Recognition ◽  
Template Matching ◽  
Optical Character Recognition ◽  
Matching Method ◽  
Writing Test ◽  
Optical Character

Abstract This research was conducted to determine the accuracy of the Sum of Squared Difference (SSD) Template Matching method in the Application of Learning Numbers Writing Games. This game application is an application created to help early childhood in recognizing Arabic numbers, namely numbers from 0 to 9. In the SSD Template Matching method there are several processes including Preprocessing, thinning, feature extraction, and classification (SSD template matching). In testing the game application involves 10 respondents who were asked to write numbers correctly as requested by the application. For each number writing test, it is tested by 3 times. From the tests conducted, obtained an accuracy of 94.67%. Keyword: Template Matching, Sum of Squared Difference (SSD), Education Game, Optical Character Recognition, Mobile Learning

Optical Character Recognition Using 26-Point Feature Extraction and ANN

2017 ◽  
Vol 7 (5) ◽  
pp. 156-162 ◽  
Author(s):  
Sandip Kundu ◽  
◽  
Hrishi Singh Chhabra ◽  
Sahi Summa Ara ◽  
Rishi Prakash Mishra ◽  
...  
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
Optical Character ◽  
Point Feature

OPTICAL CHARACTER RECOGNITION — A SURVEY

1991 ◽  
Vol 05 (01n02) ◽  
pp. 1-24 ◽  
Author(s):  
S. IMPEDOVO ◽  
L. OTTAVIANO ◽  
S. OCCHINEGRO
Keyword(s):  
Feature Extraction ◽  
Character Recognition ◽  
Optical Character Recognition ◽  
State Of The Art ◽  
The State ◽  
Historical Background ◽  
Optical Scanner ◽  
Optical Character ◽  
Recognition Systems

In order to highlight the interesting problems and actual results on the state of the art in optical character recognition (OCR), this paper describes and compares preprocessing, feature extraction and postprocessing techniques for commercial reading machines. Problems related to handwritten and printed character recognition are pointed out, and the functions and operations of the major components of an OCR system are described. Historical background on the development of character recognition is briefly given and the working of an optical scanner is explained. The specifications of several recognition systems that are commercially available are reported and compared.

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