function created for transform grayscale to binary doesn't work
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Hi,
I've created this function m file to convert grayscale images to binary images (as gray2bin matlab function):
function conv_to_BW(im)
[m,n]=size(im);
BW=zeros(m,n);
for i=1:m
for j=1:n
if im(i,j)<10
BW(i,j)=0;
else BW(i,j)=1;
end
end
end
But, when I apply this function to a file in grayscale as:
conv_to_BW(grayscalefile);
it doesn't generate BW variable-image-matrix and doesn't generate m,n variables.
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채택된 답변
Matt Fig
2012년 8월 6일
You didn't specify a return value for your function. If you want your function to return something, you have to tell it to do so.
function BW = conv_to_BW(im)
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추가 답변 (1개)
John Petersen
2012년 8월 6일
If you're interested, this should be faster code if your image is very large or you're doing many of them.
function BW = conv_to_BW(im)
[m,n]=size(im);
BW = ones(m,n);
BW(im<10)) = 0;
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