FEATURE EXTRACTION FOR CHARACTER RECOGNITION

EXTRACTS FEATURE VECTORS FROM SINGLE CHARACTER IMAGES

Description

The m-files inside this zip file extracts features of single characters based on their geometric properties. 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.

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 submission has inspired the following:; HAND-DRAWN SAMPLE IMAGES OF ENGLISH CHARACTERS
• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.0.1 (R14SP1)

Other Files

feature_extraction/feature_extraction/Algorithm.pdf,
feature_extraction/feature_extraction/debug.mat,
feature_extraction/feature_extraction/del_pixel.m,
feature_extraction/feature_extraction/discourser.m,
feature_extraction/feature_extraction/feature_extractor.m,
feature_extraction/feature_extraction/feature_extractor_2d.m,
feature_extraction/feature_extraction/finddirection.m,
feature_extraction/feature_extraction/findneighbours.m,
feature_extraction/feature_extraction/ismymember.m,
feature_extraction/feature_extraction/isnotempty.m,
feature_extraction/feature_extraction/isnotintersection.m,
feature_extraction/feature_extraction/isnotmember.m,
feature_extraction/feature_extraction/letters_skel.mat,
feature_extraction/feature_extraction/lineclassifier.m,
feature_extraction/feature_extraction/linesegmenter.m,
feature_extraction/feature_extraction/prep_image.m,
feature_extraction/feature_extraction/README.pdf,
feature_extraction/feature_extraction/README.txt,
feature_extraction/feature_extraction/README.txt~,
feature_extraction/feature_extraction/runfile.txt,
feature_extraction/feature_extraction/runfile.txt~,
feature_extraction/feature_extraction/starter_intersection.m,
feature_extraction/license.txt,
license.txt

[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 ?

[charu]