How to solve error "Error using bwmorph"

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ana ain 2015-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/232269-how-to-solve-error-error-using-bwmorph

评论： Walter Roberson 2015-8-6

采纳的回答： Walter Roberson

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I want to doing a feature extraction steps for multiple images, i have this function:

% this function is supposed to extract features from the input image
function [features]=feature_extraction(I)
if length(size(I))>2 % checking if rgb image;
  I=im2bw(I,graythresh(I));
end    
I=bwmorph(I,'skel',inf);
I=discourser(I);
row=size(I,1);
column=size(I,2); ... and so on.

And I call it in another script.

files = dir('*.png');
for i = 1:numel(files)
I = files(i).name;
[getfeature] = feature_extraction(I);
end

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ana ain 2015-8-6

could you please explain using some example? Thank you :)

Walter Roberson 2015-8-6

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I understand that. What I'm saying is that if you put the responses into into a file and then run

myexe.exe < c:\temp\inputs.txt

in the command shell and then, assuming that works,

system('myexe.exe < c:\temp\inputs.txt')

does it work?

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Walter Roberson 2015-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/232269-how-to-solve-error-error-using-bwmorph#answer_188166

You are passing the file name into the function. The name of the file does not have more than 2 dimensions so you do not use im2bw(). You are passing the name of the file to bwmorph. bwmorph is not defined for character strings.

Have you considered the possibility of reading the file content at some point?