less connected pixels should be removed from image

here is a image having an object disk and a text so check the connectivty of pixels if the area having less connectivity should be removed like in this image text has less connecctivity so i have to remove the text

Answer 1

[Anand]

Your definition of 'less connected' is not clear to me. However, if you want just the big round component, you can use regionprops to find the largest component and remove the smaller components using bwareaopen.

Here's an example:

% read image and convert to binary.
im = imread('http://www.mathworks.com/matlabcentral/answers/uploaded_files/7873/fake.png');
bw = logical(rgb2gray(im));

% use regionprops to find area of all components.
cc = regionprops(bw,'Area');

% find area of largest component.
maxarea = max([cc.Area]);

% use bwareaopen to remove smaller components.
out = bwareaopen(bw,maxarea);

Hope this helps!

Answer 2

[Filza Ashraf]

but i am not getting this on gray scale image it gives me a black and white image as an output how can i mask this out put to mu original image like this in MRI image i have to just remove the text area