imshow map image segmentation

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Ahsen Feyza Dogan 2019-7-3

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470030-imshow-map-image-segmentation

回答： Alex Mcaulley 2019-7-3

采纳的回答： Ahsen Feyza Dogan

Hi,

I wrote a code but it does not show with scale I dont understand the reason.

Thank you

I=imread('mri.jpg');

J = imcrop(I,[197 180 130 165]);

%imshow(J);

[x,y]=size(J);

K=zeros(x,y);

cthresholdh=50;

cthresholdl=0;

for i=1:x

for j=1:y

if cthresholdh >= J(i,j) && J(i,j) >= cthresholdl

K(i,j)=1;

else

K(i,j)=0;

end

imshow(K,map);

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Alex Mcaulley 2019-7-3

在 MATLAB Online 中打开

What do you mean by "it does not show with scale"? Do you have any error? The question is not clear.

By the way, you don't need the loop nor x, y variables:

I=imread('mri.jpg');
J = imcrop(I,[197 180 130 165]);
%imshow(J);
K=zeros(size(J));
cthresholdh=50;
cthresholdl=0;
K(J >= cthresholdl & J <= cthresholdh) = 1;
imshow(K,map);  

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Thank you I want to show like this image.

https://www.mathworks.com/help/examples/images/win64/MRISliceExample_02.png

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Alex Mcaulley 2019-7-3

Can you upload your image ('mri.jpg')?

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Alex Mcaulley 2019-7-3

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470030-imshow-map-image-segmentation#answer_381772

在 MATLAB Online 中打开

You just need to tune the rectangle in the imcrop call to adjust it to the result you want. For example:

I=imread('mri.jpg');
J = imcrop(I,[90 70 340 410]); %Changed
%imshow(J);
K=zeros(size(J));
cthresholdh=50;
cthresholdl=0;
K(J >= cthresholdl & J <= cthresholdh) = 1;
imshow(K)