Captcha stands for Completely Automated Public Turing Tests to Distinguish Between Humans and Computers. This test cannot be successfully completed by current computer systems; only humans can. It is applied in several contexts for machine and human identification. The most common kind found on websites are text-based CAPTCHAs.A CAPTCHA is made up of a series of alphabets or numbers that are linked together in a certain order.

DOI Link: 
10.21227/w9xw-sd30
Links or DOI: 
Handwritten Devanagari Characters – Vowels, Consonants and Numerals for Devanagari CAPTCHA generation (44,000 Isolated images)
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Dataset Files

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[1] SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE, "Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test", IEEE Dataport, 2023. [Online]. Available: http://dx.doi.org/10.21227/w9xw-sd30. Accessed: Mar. 11, 2025.
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url = {http://dx.doi.org/10.21227/w9xw-sd30},
author = {SANJAY E. PATE; PROF.DR.RAKESH J. RAMTEKE },
publisher = {IEEE Dataport},
title = {Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test},
year = {2023} }
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T1 - Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test
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SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE. (2023). Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test. IEEE Dataport. http://dx.doi.org/10.21227/w9xw-sd30
SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE, 2023. Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test. Available at: http://dx.doi.org/10.21227/w9xw-sd30.
SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE. (2023). "Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test." Web.
1. SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE. Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test [Internet]. IEEE Dataport; 2023. Available from : http://dx.doi.org/10.21227/w9xw-sd30
SANJAY E. PATE, PROF.DR.RAKESH J. RAMTEKE. "Devanagari Handwritten CAPTCHA - Dataset of 90 K Images : A Challenge Test." doi: 10.21227/w9xw-sd30