how to select particular minuate in finger print image and then convert to hexadecimal code ...

after ridges and bifurucation i need to selct the singular point of the image and check the integer value

[Walter Roberson]

ginput() and dec2hex or num2hex

Answer 1

[Vaibhav]

Hi Sravani,

I understand that you would like to pinpoint a single spot on an image and then convert the value to hexadecimal code.

One of the approach can be using "ginput()" and "dec2hex()" functions.

• The "ginput(1)" function allows to interactively select a point in the image.
• Convert the value of the selected point into hexadecimal using the "dec2hex" function.

Check out the code snippet below for using "ginput" and "dec2hex":

% Load an example image
imagePath = 'peppers.png';  % Replace with the path to your image
originalImage = imread(imagePath);

% Display the original image
figure;
imshow(originalImage);
title('Select a Point');

% Use ginput to interactively select a point
disp('Select a point on the image...');
selectedPoint = round(ginput(1));  % Get the coordinates of the selected point
disp(['Selected Point: ', num2str(selectedPoint)]);

% Extract the intensity value at the selected point
intensityValue = originalImage(selectedPoint(2), selectedPoint(1), 1);

% Convert the intensity value to hexadecimal
hexCode = dec2hex(intensityValue, 2);

% Display the results
disp(['Intensity Value: ', num2str(intensityValue)]);
disp(['Hexadecimal Code: ', hexCode]);

You can refer to below MathWorks documentation to know more about "ginput" and "dec2hex":

https://www.mathworks.com/help/matlab/ref/ginput.html?s_tid=doc_ta

https://www.mathworks.com/help/matlab/ref/dec2hex.html?s_tid=doc_ta

Hope this helps!