How to implement Stroke Width Transform Algorithm

2012 12 3
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更新时间：2016 6 10
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I am doing a project on Text Detection in Natural Scene Images. Does any one give me suggestions or any ideas for implementing Stroke Width Transform Algorithm. I aware of some steps 1.canny edge detection 2.gradient for canny image 3.stroke width detection 4.connected component grouping. I got struck while implementing 3rd step. Can any one give me clear steps with MATLAB code.
Thank You

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Kodaganur
Kodaganur 2012-12-4
编辑：Kodaganur 2012-12-4
I aware of some steps
canny edge detection
gradient for canny image
stroke width detection
connected component grouping.
I got struck while implementing 3rd step. Please any one give me clear steps with MATLAB code for 3rd step.
clc;
clear all;
close all;
I=imread('12.jpg');
I1=rgb2gray(I);
ed=edge(I1,'canny',0.4);
[gx gy]=gradient(double(ed),0.5);
figure;
imshow(I);
gm=sqrt(gx.^2+gy.^2);
gdp=atan2(gy,gx);
figure;
imshow(gm);
[r c]=size(gdp);
%if pixel p lies on the stroke boundary,then gdp(gradient direction) must% %be perpendicular to the orientation of the stroke% for i=1:r
for j=1:c
if gdp(i,j)==ed(i,j)
ray(i,j)=gm(i,j)+1*gdp(i,j);
end
end
end
In above code after finding gradient magnitude and direction, after that i need to consider gradient direction gdp of edge pixel p.then i need to follow the ray, ray=p+n.gdp, for n>0 until another edge pixel q is found. Please help me how to implement these steps.
Kodaganur
Kodaganur 2012-12-4
Please find the below link for images.
https://www.filesanywhere.com/fs/v.aspx?v=8a726689596171aa71a1
Abdullah
Abdullah 2015-1-29
this link does not work.... can you update it please
Celine Preeti
Celine Preeti 2016-3-2
Has anybody found a solution to this problem. I m completely new to image processing and would like to know how to perform stroke width transform

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