How to save the enhanced fingerprint images

please do help i have enhanced the fingerprint images and now i want to save them for matching how i can do this.

[Johannes Rebling]

First you can do this by providing a meaningful minimal example.

Answer 1

[Cam Salzberger]

If you have the image as a matrix, use imwrite. If you have "enhanced" the image by using figure tools (axes, plotting, etc.), use print.

-Cam

[uma]

yes the images are in matrix form .Actually i want to save the enhanced image in a dataset. so that i can use them for matching.

[Image Analyst]

If they're floating point, you can use save() to save them and any other variables you want into a mat file. If they're uint8 or uint16, simply use imwrite() to save them to individual files. We don't know your definition of a "dataset" but if it's just a folder of images, then imwrite() will work. If you really want a database, then you'll need the Database Toolbox.

[uma]

please do help i have this following error. while executing the below code. I just want to save the 20 enhanced images in a folder.

Error using imwrite (line 528)

Unable to open file "C:\Users\Dell\Desktop\python tutorials\matlab\myfiles\matlab\myfiles\Dataset 2\Enhanced images\101_1.tif" for writing. You might not have write permission.

Error in tess2 (line 38)

imwrite(p,path);

for i=1:length(srcFile)
    filename=strcat('C:\Users\Dell\Desktop\python tutorials\matlab\myfiles\matlab\myfiles\Dataset 2\',srcFile(i).name);
    a=imread(filename);
    path=strcat('C:\Users\Dell\Desktop\python tutorials\matlab\myfiles\matlab\myfiles\Dataset 2\Enhanced images\',srcFile(i).name);
     b=double(a(:));
lem=225;
minim=min(b(:));
maxim=max(b(:));
[m,n]=size(a);
x=zeros(1,225);
q=zeros(1,225);
w=zeros(1,225);
r=zeros(1,225);
E=zeros(1,225);
u=zeros(1,225);
for i=1:m
    for j=1:n
        g=a(i,j);
        x(i,j)=((g-minim)./(maxim-minim));
        q(i,j)=((1+lem)*x(i,j))./(1+lem*x(i,j));
        w(i,j)=(1-x(i,j))./(1+(3*lem*x(i,j))+(lem^2*x(i,j))+x(i,j));
        r(i,j)=1-q(i,j)-w(i,j);
        E(i,j)=(1./x(i,j))*(sum(sum(r(i,j)*exp(1-r(i,j)))));
        u(i,j)=maxim*(E(i,j)+lem);
        t=q(i,j)^1.25;
        
for y=0:0.1:1
    if t<=0.5
    p(i,j)=2*(t^2);
    else
        p(i,j)=1-2*((1-t)^2);
    end
end           
    end
end
figure, imshow(p);
imwrite(p,path);
 
end

[Walter Roberson]

Use Windows Explorer to examine the security settings of the file and directory to ensure that you have write permission.

[uma]

Is there any other option to save these images in a folder?

[Walter Roberson]

No, there is no other way to save the images in a folder. No matter which folder you make your current folder, and no matter whether you use a relative path or a complete path, you still end up using imwrite() or equivalent, and you still risk being denied write access.

You need to figure out why it is not permitting you to save in that location.

I have to wonder why you have matlab\myfiles\matlab\myfiles in your path instead of just matlab\myfiles

create_missing = false;

parts = {'C:\', 'Users', 'Dell', 'Desktop', 'python tutorials', 'matlab', 'myfiles', 'matlab', 'myfiles', 'Dataset 2', 'Enhanced images'};

if ~exist(parts{1}, 'dir')
    error('You do not have a C: drive. Giving up.');
end

failed = false;
for K = 2 : length(parts)
    thispath = fullfile(parts{1:K});
    if exist(thispath, 'dir')
        fprintf('Okay we already have directory %s\n', thispath);
    elseif create_missing
        try
            mkdir(thispath);
            fprintf('Was able to create missing directory %s\n', thispath);
        catch
            fprintf('Failed trying to create missing directory %s', thispath);
            oldpath = fullfile(parts{1:K-1});
            p = fileattrib(oldpath);
            fprintf('Attributes of parent directory %s are:\n', oldpath);
            disp(p);
            failed = true;
            break
        end
    else
      fprintf('Directory %s does not exist and you asked that missing directories not be created. Set the variable create_missing to true if you want the directory created\n', thispath);
      failed = true;
      break
    end
end
if failed
    fprintf('Some directory not created. Not ready to use\n');
else
    fprintf('Okay, should be ready to use directory %s\n', fullfile(parts{:}) );
end