Error with function duplicate name where there is only one function.

Hello

Matlab tries to call a function with the name "SegmentBone" as you can see from the example but I get the error of duplicate name and that Matlab cannot define it. There is only one SegmentBone.m in the folder. Why duplicate name?

Error: File: SegmentBone.m Line: 7 Column: 18
Function with duplicate name "SegmentBone" cannot be defined.

Error in Test1 (line 38)
imSeg = SegmentBone(im, 10e6, 0.031);

[Adam Danz]

Make sure your main function name matches the m file name and that you don't have two different functions with the same name within the file. This demo below reproduces your error (saved in a file name SegmentBone.m).

function y= SegmentBone(x)

q = jff(4); 
y = x * q; 


function q = SegmentBone(x)
q = x+1; 

y = SegmentBone(1); 

Error: File: SegmentBone.m Line: 7 Column: 14
Function with duplicate name "SegmentBone" cannot be defined. 

[Stelios Fanourakis]

I use that code. There is no SegmentBone.m in the same script anywhere else or in the working folder.

% Apply the bone segmentation to test image and show the results
clc
close all
clear all
 
path = imread('2A.bmp');
imROIminX = 159;
imROImaxX = 536;
imROIminY = 33;
imROImaxY = 410;
% path = 'Z:\Data\Cadaver_Experiment_2\Data\MaleCadaver\1\center\im';
% imROIminX = 159;
% imROImaxX = 536;
% imROIminY = 33;
% imROImaxY = 410;
 
i = 69; %81;
lp = sprintf('%s%04d.bmp', path, i);
im = imread('2A.bmp');
%%
% 
%   for x = 1:10
% 
%   for x = 1:10
%       disp(x)
%   end
% 
%       disp(x)
%   end
% 
im = im(imROIminY:imROImaxY, imROIminX:imROImaxX);
im = im2double(im);
[imH, imW] = size(im);
% im = flipdim(im,2);
figure, imshow(im);
 
tic
imSeg = SegmentBone(im, 10e6, 0.031);
toc
 
% figure, imshow(imSeg)
 
im4 = imresize(im,size(imSeg));
% subplot(1,2,1), imshow(im4)
% subplot(1,2,2), imshow(imSeg)
 
[BoneIdx] = find(imSeg>0);
imOverlapped = im4;
imOverlapped(BoneIdx) = 1;
figure, imshow(imOverlapped)
 
% imwrite(im4,'results\5_original.bmp','bmp');
% imwrite(imOverlapped,'results\T9SegIM.bmp','bmp');

[Adam Danz]

Two quick things;

1) could you show us the results of this?

which SegmentBone -all

2) could you show us the content of segmentBone.m, particularly the code around line 7?

[Stelios Fanourakis]

1) Yes it's the correct function

This is the SegmentBone.m function. It starts at line 7 where all the previous lines are comments in green

function imSeg = SegmentBone(USimage, USfreq, USdepth)
 
[imH, imW] = size(USimage);
 
% calculate the segmentation parameters from US image parameters
boneTh = 1/8;   % used for masking
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Downsampling
DownSampleFactor = 4;
% filter
Gsigma = 6;
hsize = floor(Gsigma*3)*2+1;
h = fspecial('gaussian', hsize, Gsigma);
imBlured = imfilter(USimage, h, 'replicate', 'same');
imBlured = imBlured(1:DownSampleFactor:imH,1:DownSampleFactor:imW);
imBlured = AdjustContrast(imBlured);
figure, imshow(imBlured)
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
h = [0 -1 0; -1 4 -1; 0 -1 0];
imBLOG = imfilter(imBlured, h, 'replicate', 'same');
imBLOG = (imBLOG>0).*imBLOG;
imBLOG = imBLOG/max(imBLOG(:));
figure, imshow(imBLOG)
 
% To make the algorithm faster, keep track of the points that are probable
% to be the bone surface
% First: Apply the threshold to the image (this is a loose threshold)
imMask = (imBlured >= boneTh);
[imH, imW] = size(imMask);
BorderRigeon = round((0.002/USdepth)*imH);
imMask(1:BorderRigeon,:) = 0;
 
% calculate the weight for underneath shadowness
Wshw = CalcBoneShadow(imMask, imBlured);
figure, imshow(Wshw);
 
% calculate the intensity weight
Wint = imMask .* (imBlured+imBLOG);
Wint = AdjustContrast(Wint);
figure, imshow(Wint);
 
 
% calculate the total Boniness, (Multipication prefered over addition) 
Bness = Wshw.*Wint;
Bness = Bness/max(Bness(:)); % normalize
figure, imshow(Bness);
% imwrite(Bness, 'results\cadaver_2_50_Bness.bmp', 'bmp');
% Find bone surface using Dynamic Programming
% Smoothness will be applied through DP
% Presence of bone will be also determined using DP
% imSeg = FindBoneDP(Bness);
F0 = 50.0;  F1 = 100.0;  Bth = 0.55;  % bone threshold between 0 and 1
JumpConst = 1.5;
% imSeg = FindBoneDP(Bness,F0,F1,Bth,JumpConst);
imSeg = SegmentBoneDP(Bness,F0,F1,Bth,JumpConst);
 
end

[Adam Danz]

My first "quick thing" doesn't address whether you're using the correct function. It confirms that there are no other files with the same name. Did you run that line? What does it output?

which SegmentBone -all

Also, what version of matlab are you using? If there are any non-comments prior to the first line of code where the function is declared, that would produce the error you're getting (in r2016a or prior).

[Stelios Fanourakis]

No, there is only one segmentBone.m function using the which command

I use R2018b

[Adam Danz]

If you attach SegmentBone.m, Test1.m, 2A.bmp, and any other inputs needed to recreate the problem, I can look into it further.

[Stelios Fanourakis]

I use the line

mex SegmentBone.cpp

This should do the compiling from cpp to Mex. However, I get the error

mex SegmentBoneDP.cpp
Building with 'Xcode Clang++'.
Error using mex
/Users/steliosphanourakes/Desktop/Matlab/DesMoines/karadokei -
Copy/FANOURAKIS_STELIOS12/20190516144930/SegmentBoneDP.cpp:17:17: error: assigning to 'const int *' from
incompatible type 'const mwSize *' (aka 'const unsigned long *')
    DimsBness = mxGetDimensions(prhs[0]);
                ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018b.app/extern/include/matrix.h:243:25: note: expanded from macro 'mxGetDimensions'
#define mxGetDimensions mxGetDimensions_730
                        ^
/Users/steliosphanourakes/Desktop/Matlab/DesMoines/karadokei -
Copy/FANOURAKIS_STELIOS12/20190516144930/SegmentBoneDP.cpp:30:15: error: no matching function for call to
'mxCreateNumericArray_730'
    plhs[0] = mxCreateNumericArray(2,DimsBness,mxDOUBLE_CLASS,mxREAL);
              ^~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018b.app/extern/include/matrix.h:275:30: note: expanded from macro 'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^~~~~~~~~~~~~~~~~~~~~~~~
/Applications/MATLAB_R2018b.app/extern/include/matrix.h:1247:1: note: candidate function not viable: no known
conversion from 'const int *' to 'const mwSize *' (aka 'const unsigned long *') for 2nd argument
mxCreateNumericArray(mwSize ndim, const mwSize *dims, mxClassID classid, mxComplexity flag);
^
/Applications/MATLAB_R2018b.app/extern/include/matrix.h:275:30: note: expanded from macro 'mxCreateNumericArray'
#define mxCreateNumericArray mxCreateNumericArray_730
                             ^
2 errors generated.
 

Anyone who can responsibly help me?

Thanks

[Walter Roberson]

You duplicated that into another question. The volunteers are not fond of answering the same query in three different Questions.