how do i solve? Not enough input arguments:

I am receiving the following error message:

>> EulerMinMax
Error using EulerMinMax (line 26)
Not enough input arguments.

in this code:

 function c = EulerMinMax(i,b)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% This function extract a binary image from gray scale image
% using auto-tuned threshold value obtained from the correlation
% of Image euler numbers. This work had been published in 
%
% L.P Wong, H.T Ewe. 
% A Study of Lung Cancer Detection using Chest X-ray Images. 
% 3rd APT Telemedicine Workshop 2005, 27-28th January 2005, Kuala Lumpur, 
% Malaysia. Pages 210-214.
%
% c is the binary image output from the calculation 
% i is the input Gray Scale Image (E.g unit8 image)
% b is then number of level used to calculate the threshold (E.g 255)
%
% Example:
% a = imread('case1_pa_wo.tif');
% c = eulerminmax(a,255); 
% imshow(c);
%
% This function works for Matlab 7.0 with bweuler() and histeq() function
% from Image Processing Toolbox. No further validation for other version. 
%
% Wong Lip Pang 2006
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
a = histeq(i);
trans_thresh = mrdivide(0:1:b,b); % Here is to set an array for 
                                  %  calculating different euler number      
        for j=1:(b+1)
            value_trans1 = trans_thresh(1,j);
            result4_trans1(j,1) = bweuler(im2bw(a,value_trans1),4);
        end
max_result4_trans1 = max(result4_trans1); % Calculating max of euler number  
min_result4_trans1 = min(result4_trans1); % Calculating min of euler number
m = 0;
n = 0;
max_sum_result4_trans1 = 0;
min_sum_result4_trans1 = 0;
for j = 1:(b+1)
    if result4_trans1(j,1) == max_result4_trans1
        m = m+1;
        max_sum_result4_trans1 = max_sum_result4_trans1 + j;

    elseif result4_trans1(j,1) == min_result4_trans1
        n = n+1;
        min_sum_result4_trans1 = min_sum_result4_trans1 + j;

    else
        %Should Do Nothing Here
    end
end
% Getting the mean of the threshold
threshold_I1 = ((max_sum_result4_trans1)+(min_sum_result4_trans1))/(m+n);
c =  im2bw(a,threshold_I1/(b+1));

can anyone help? it will be very much appreciated

[Walter Roberson]

Did you read the comments and follow the example?

[Muhammad]

Yes, I tried to load an x-ray image like this

function c = EulerMinMax(chestxray.jpg , 255)

link of image http://www.texascollaborative.org/Puccini%20Module/images/chestxray.jpg

where is my problem??

Answer 1

[Praful Mathur]

The image must be converted to Gray Scale first.

1. i=imread('chestX-ray.jpg');
2. img=rgb2gray(i);
3. result = EulerMinMax(img, 255);

Answer 2

[Walter Roberson]

Do not change the line

   function c = EulerMinMax(i,b)

Instead,

MyImage = imread('chestxray.jpg');
result = EulerMinMax(MyImage, 255);

Answer 3

[Rimmon Bhosale]

Installed the 'image processing toolbox' using matlab installer.

Added the following code before(not mandatory) function as suggested by others:

a = imread('img_name.jpg'); %Read image

img=im2gray(a); %Convert to grayscale

c = EulerMaxMin(img, 255); %Call the function

imshow(c); %Display the result

And added, end at the end of the given function:

...%Rest of the code for the function

% Getting the mean of the threshold

threshold_I1 = ((max_sum_result4_trans1)+(min_sum_result4_trans1))/(m+n);

c = im2bw(a,threshold_I1/(b+1));

end