How can i find out if two minutiae points in a fingerprint image are on the same ridge line?

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Fego Etese 2020-3-21

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https://ww2.mathworks.cn/matlabcentral/answers/512047-how-can-i-find-out-if-two-minutiae-points-in-a-fingerprint-image-are-on-the-same-ridge-line

评论： Fego Etese 2020-3-24

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.

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darova 2020-3-24

What about bwlabel? You can separate each 'white' line and loop through all individually

Check if one has 2 points

Fego Etese 2020-3-24

编辑：Fego Etese 2020-3-24

Thanks for your help on this, if i have two white points on the image how can i know with this method you've proposed that they are either on the same line or on different white lines? I mean if you could please just explain to me how the bwlabel can help me do this, I will be very grateful.

Thanks

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采纳的回答

darova 2020-3-24

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/512047-how-can-i-find-out-if-two-minutiae-points-in-a-fingerprint-image-are-on-the-same-ridge-line#answer_421793

在 MATLAB Online 中打开

image.jpg

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