15,917,808 members
Sign in
Sign in
Email
Password
Forgot your password?
Sign in with
home
articles
Browse Topics
>
Latest Articles
Top Articles
Posting/Update Guidelines
Article Help Forum
Submit an article or tip
Import GitHub Project
Import your Blog
quick answers
Q&A
Ask a Question
View Unanswered Questions
View All Questions
View C# questions
View C++ questions
View Javascript questions
View Visual Basic questions
View Python questions
discussions
forums
CodeProject.AI Server
All Message Boards...
Application Lifecycle
>
Running a Business
Sales / Marketing
Collaboration / Beta Testing
Work Issues
Design and Architecture
Artificial Intelligence
ASP.NET
JavaScript
Internet of Things
C / C++ / MFC
>
ATL / WTL / STL
Managed C++/CLI
C#
Free Tools
Objective-C and Swift
Database
Hardware & Devices
>
System Admin
Hosting and Servers
Java
Linux Programming
Python
.NET (Core and Framework)
Android
iOS
Mobile
WPF
Visual Basic
Web Development
Site Bugs / Suggestions
Spam and Abuse Watch
features
features
Competitions
News
The Insider Newsletter
The Daily Build Newsletter
Newsletter archive
Surveys
CodeProject Stuff
community
lounge
Who's Who
Most Valuable Professionals
The Lounge
The CodeProject Blog
Where I Am: Member Photos
The Insider News
The Weird & The Wonderful
help
?
What is 'CodeProject'?
General FAQ
Ask a Question
Bugs and Suggestions
Article Help Forum
About Us
Search within:
Articles
Quick Answers
Messages
Comments by Member 10348471 (Top 7 by date)
Member 10348471
26-Oct-13 0:37am
View
but why will u plz tel my error???
and which details....
plz help me sir its my MS Thesis project.... :-(
Member 10348471
24-Oct-13 2:33am
View
ok i m uploding my part of code it debug prfectly no error but output is not corect means it dose not locate rit location of core point.
for(int x = 0; x+pBl_Sz <=(&pioncare)->height ; x=x+pBl_Sz)
{
for(int y = 0; y+pBl_Sz <=(&pioncare)->width; y=y+pBl_Sz)
{
//fprintf(fb,"\n\nFor Block %d\n\n",++count);
cvSetImageROI(&pioncare,cvRect(y,x,pBl_Sz,pBl_Sz));
cv::Mat L(&pioncare);
for(int j=1; j<l.rows-1;j>(j,i-1))-(L.at<float>(j-1,i-1)));
{
if (abs(s0)<90)
d0=s0;
else if (s0<-90)
d0=s0+180;
else if (s0>90)
d0=180-s0;
}
float s1 = ((L.at<float>(j+1,i-1))-(L.at<float>(j,i-1)));
{
if (abs(s1)<90)
d1=s1;
else if (s1<-90)
d1=s1+180;
else if (s1>90)
d1=180-s1;
}
float s2 = ((L.at<float>(j+1,i))-(L.at<float>(j+1,i-1)));
{
if (abs(s2)<90)
d2=s2;
else if (s2<-90)
d2=s2+180;
else if (s2>90)
d2=180-s2;
}
float s3 = ((L.at<float>(j+1,i+1))-((L.at<float>(j+1,i))));
{
if (abs(s3)<90)
d3=s3;
else if (s3<-90)
d3=s3+180;
else if (s3>90)
d3=180-s3;
}
float s4 = ((L.at<float>(j,i+1))-(L.at<float>(j+1,i+1)));
{
if (abs(s4)<90)
d4=s4;
else if (s4<-90)
d4=s4+180;
else if (s4>90)
d4=180-s4;
}
float s5 = ((L.at<float>(j-1,i+1))-(L.at<float>(j,i+1)));
{
if (abs(s5)<90)
d5=s5;
else if (s5<-90)
d5=s5+180;
else if (s5>90)
d5=180-s5;
}
float s6 = ((L.at<float>(j-1,i))-((L.at<float>(j-1,i+1))));
{
if (abs(s6)<90)
d6=s6;
else if (s6<-90)
d6=s6+180;
else if (s6>90)
d6=180-s6;
}
float s7 = ((L.at<float>(j-1,i-1))-((L.at<float>(j-1,i))));
{
if (abs(s7)<90)
d7=s7;
else if (s7<-90)
d7=s7+180;
else if (s7>90)
d7=180-s7;
}
p=((d0+d1+d2+d3+d4+d5+d6+d7)/360);
}
}
if (p<0.45||p>0.51)
{
}
else
{
s.val[0]= 255;
cvSet2D(coreImage,(x+1),(y+1),s);
fprintf(fb,"\n %d %d \n",x+1,y+1);
}
cvResetImageROI(&pioncare);
}
fprintf(fb,"\n");
}
Member 10348471
22-Oct-13 3:32am
View
can u help me 2 in finding this core point...????
Member 10348471
22-Oct-13 3:19am
View
Deleted
:-( ok thnkyou
Member 10348471
22-Oct-13 2:58am
View
i m doing rit
gradient is not problem...
problem is core point of finger print
can u plz guid me
Member 10348471
22-Oct-13 2:33am
View
so what is gradient then...? i just read that by using sobel operator u can find gradient.
ok u r not geting me
hv u any idea how to find core point in fingrprint.???
help me in finding this i stuk for 5 months....
Member 10348471
22-Oct-13 0:58am
View
sir actually i read the reserch paper n follow the steps but i stuk now.
actually what i am doing is
Take the fingerprint image.
Convert the image into grayscale then binary image.
Divide binary image data into blocks of size wxw. Where w=16.
Compute the gradient in x and y direction by using sobel operator (in my program) at each pixel of the block.
Estimate local orientation of block.The angle range is [0, pi].
Now the image is again divided into blocks of non overlapping window 3x3 and poincare index value method is used to detect core point.
If P(x,y)=0.5 then that will be the core point.
but the problem is when i store the values of the angle in a matrix it stores at places like
0 0 0 16 0 32 because block is of 16x16
now tell me is it rit what i m doing.the values are stored at rit position???
Plz help me ...
Show More