How do to remove section of a defined path (skeleton)?

Hi, I want to remove the areas that are inside the circles. I had tried it using some structurant (using morphological operations as the erode )element but I don't get the goal . This is that I have :

im=imread('dos.bmp');
>> im=rgb2gray(im);
>>figure, imshow(im)
>> er=imerode(im,B);
>> imshow(er);

..

Answer 1

[darova]

Try my script

[Julián Mauricio Ruiz Echeverri]

Hello, Why does for this image the code give me a error?... It is about the Matrix dimensions must agree... For some images the code workin good but for this image not

[darova]

Sometimes spures are short and circel region is small

There is a line in the code that reduces circle region

msk = bwmorph(msk,'thin',1);    % reduce circle mask        

If the region has 2 pixels (long) and the region is reduces then area is 0 (has no area)

So i just added this condition

if ~isempty(ar)

Try now

[Julián Mauricio Ruiz Echeverri]

Thank you !