I am doing my project in medical imaging. I am getting "index exceeds matrix dimensions" while trying to segment the lungs. please help me

I = im2double(imread('onee.png'));  
I=I(:,:,1);

cropped = I(50:430,8:500); %%Crop region of interest   
thresholded = cropped < 0.35; %%Threshold to isolate lungs
clearThresh = imclearborder(thresholded); %%Remove border artifacts in image   
Liver = bwareaopen(clearThresh,100); %%Remove objects less than 100 pixels
Liver1 = imfill(Liver,'hole'); % fill in the vessels inside the lungs
imshow(Liver1.*cropped)

[Stephen23]

Please edit your question by formatting your code to be more readable: this will encourage people to read and understand what you are trying to do. You will find some buttons immediately above the text field, allowing you to add some basic formatting. Use the "{} Code" button to format any code, keeping the code tidy, eg one line per line of code. Pay attention to the "Preview" pane underneath too!

Some explanation of what you understand, what you are trying and what you expect would be useful information for potential helpers here...

[Ank]

    I(50:430,8:500)

may be this line.

what is the size of the image is it more than 430x500? If no then you are accessing values outside the matrix hence the error.

Answer 1

[Image Analyst]

Put this line right before your crop:

[rows, columns] = size(I)

What do you see? Are there at least 430 rows and 500 columns? No, there are not.