how to make a function with three parameter

Hello everyone

I am trying to create a function with three inputs: two images, and id of patient...I can not do

main.m

image1='c:\image1.bmp';
image2='c:\image2.bmp';
id=1;
result=delta(image1,image2,id);

delta.m

function delta(image1,image2,id)

im1=imread(image1);

im2=imread(image2);

it's just an example

Answer 1

[Wayne King]

Just declare the function

function [output] = DescriptiveNameHere(image1,image2,patientID)

. . . end

save it in a folder and add that folder to the MATLAB path.

You then just call that function at the command line.

 >> output = DescriptiveNameHere(image1,image2,patientID);

See the information here:

Writing MATLAB Function

You can write your function so that it accepts an image name, or the path to the image plus the image name.

Write your function to accept string input arguments.

Answer 2

[Image Analyst]

I don't know what ID or delta is but maybe delta is the difference image

function diffImage = delta(image1, image2, id)
diffImage  = []; % Initialize
try
    % First check that image1 and image2 exist with the exist() function.
    if ~exist(image1)
        message = sprintf('Error.  Image file does not exist:\n%s', image1);
        uiwait(warndlg(message));
        return;
    end
    if ~exist(image2)
        message = sprintf('Error.  Image file does not exist:\n%s', image2);
        uiwait(warndlg(message));
        return;
    end
    im1=imread(image1); % image1 is a filename string, not an image!
    im2=imread(image2);
    % Check that dimensions of the two images match.
    [rows1, columns1, numberOfColorChannels1) = size(im1);
    [rows2, columns2, numberOfColorChannels2) = size(im2);
    if row1~=rows2 || columns1~=columns2 || numberOfColorChannels1 ~= numberOfColorChannels2
        message = sprintf('Error.  Image dimensions do not match!');
        uiwait(warndlg(message));
        return;
    end
    % Now do the subtraction.
    diffImage = double(im1) - double(im2);
    % Now, not sure what to do with "id" that you passed in.
catch ME
    errorMessage = sprintf('Error in function %s() at line %d.\n\nError Message:\n%s', ...
        ME.stack(1).name, ME.stack(1).line, ME.message);
    fprintf(1, '%s\n', errorMessage);
    uiwait(warndlg(errorMessage));
end