How can i find out if two minutiae points in a fingerprint image are on the same ridge line?
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Please i need help on how to know if two minutiae points on a fingerprint image are on the same ridge so as to be able to remove fake minutiae points from the fingerprint.
So I have done the extraction of minutiae points in the fingeprint image but how can i know if two of these minutiae points are on the same ridge line i.e. the same white line.
Thanks.
2 commentaires
darova
le 24 Mar 2020
What about bwlabel? You can separate each 'white' line and loop through all individually
Check if one has 2 points
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darova
le 24 Mar 2020
Simple example
I0 = imread('image.jpg');
I1 = ~im2bw(I0);
I2 = bwmorph(I1,'thin',inf);
I3 = bwareaopen(I2,30); % remove lines bigger 30 pixels
[L,n] = bwlabel(I3); % label each region
for i = 1:n
Ic = L==i; % find region
Ib = bwmorph(Ic,'branchpoints'); % branch/minutae points
[y,x] = find(Ib); % find coordinates minutae points
II = cat(3,Ic,I3,I3*0);
imshow(II,'initialmagnification','fit')
hold on
plot(x,y,'or')
hold off
pause(1)
end
I used attached image. So how do you want to remove points? And which one?
14 commentaires
Image Analyst
le 24 Mar 2020
Yes, if L(row1, col1) is the same as L(row2, col2) then they are on the same ridgeline, otherwise they are on different ridgelines.
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