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FEATURE EXTRACTION FOR CHARACTER RECOGNITION

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FEATURE EXTRACTION FOR CHARACTER RECOGNITION

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02 Jul 2009 (Updated )

EXTRACTS FEATURE VECTORS FROM SINGLE CHARACTER IMAGES

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Description

The m-files inside this zip file extracts features of single characters of english language based on their geometric properties from the input image. Two approaches are explained for extracting feature vectors. The final feature vector generated for my purpose had more 120 elements. The features are based on the basic geometric shapes that comprises a single character. It calculates how many basic line segments are there in the given character. Basic line segments like horizontal, vertical and diagonal are what looked for. Their length and area normalized to the entire image are used as features. The number of holes in a image is another feature. SImilar properties are used for feature extraction.

The algorithm used for this work is written and uploaded at

http://arxiv.org/abs/1202.3884

A set of sample images I used for feature extraction has been given here

http://www.mathworks.com/matlabcentral/fileexchange/26158-hand-drawn-sample-images-of-english-characters

Acknowledgements

This file inspired Hand Drawn Sample Images Of English Characters.

Required Products Image Processing Toolbox
MATLAB release MATLAB 7.0.1 (R14SP1)
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Comments and Ratings (20)
27 Nov 2014 UITM SHAH ALAM

i’m Nur Anis study on a research about the classification of satellite image(Landsat 8 Image) using Artificial Neural Network.
I don’t know how to extract the features from the images in matlab to I continue train and classify the image into five classes.
Thank you.

14 Sep 2014 Ebenezer Olaniyi

Good day,please im working on a project and i found your explanation from the pdf help but please can you send to my email at obalolu117@yahoo.com the complete code of the character recognition.
Looking forward to hearing from you.
Thank you.

25 Jun 2013 Reza

It helped me a lot
Thank you very much...

21 Jan 2013 msp

which is main file an zip folder? which .m file i should run first ? please help

15 Sep 2012 Binh Physel  
31 May 2012 mahsa

hi, I have a project about pornographic image filtering with decision tree... I don't know how to extract the features from the images, I just have a code which can calculate the skin percent of the skin via its color... could you help me, Contact me on mahsa.alvandi@yahoo.com

23 Apr 2012 samar  
21 Apr 2012 alkesh mungra

Hi dinesh
can u send me that code ?
please

14 Apr 2012 sneha

hi dinesh can u send me the recognition code??plz.....its urgent.........

03 Apr 2012 mmm ssss

Hi Dinesh

i sent you an email @gmail i have a B/w images but i dont know if this algorithm is resitricted on the character recognition , it is very helpful work ... i tried your code on my images and i obtained feature vectors ... now is there any code that enable me to test these vectores if they work perfectly and recognized person or not ???

help me pleaseeeeee.

28 Mar 2012 Anita Jindal

This code is very helpful...but it does nt run for 4*4 zoning.plz provide me help for running it for different zones

Waining for soon reply

28 Feb 2012 Mohammad Yacob

how do i use the ocr created by dinesh

02 May 2011 RAVI KIRTIVADAN

hello dinesh this code is working nicely. but how to used these features to train neural network please give me your valuable guidelines.contact me on raviesheth@gmail.com

22 Apr 2011 li ping

thanks

17 Feb 2011 Abdul Haleem Butt

i need some guidness
i want to extarct feactures for character recognation but finally i need values in the form of integer values for classfi´cation because of the tool requirment which i am going to use.....
if any one have suggesion please guide me......

18 Apr 2010 harsh modi

Thanks Dinesh
can you send the code for using this features for reconition of the characters from a form or handwritten document .or can u please provide any help for how to recognize characters. its really urgent coz we hv to submit our project within three weeks
my email id is harshmodi.88@gmail.com

17 Mar 2010 Kalyani Bhosale

Thanks for useful posts.
but can u tell me, after extracting the features when u train the neural n/w how will u set ur 'P' n 'T' parameters? whether the o/p after training is in tabular form or it displays the recognised character?

12 Mar 2010 Ann  
07 Dec 2009 charu  
14 Nov 2009 khader Mohammad

Thanks Dinesh
can you send the recognetion part where you use these features to recognize the character.

does this work for all characters capital and small ?
does it work for numbers ?
what is the procedure of runing the code ?

Updates
03 Aug 2009

README file in pdf format has been included

29 Nov 2009

Added a test run file

25 Dec 2009

Updated about the set of sample images

20 Feb 2012

Updated documentation

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