sharpening or cleaning this binary mask

Hi, Image Analyst.,Could you please help me in sharpening or cleaning this binary mask please which is attached here. I have tried alot and got this refinement only. please suggest something.

[jonas]

I am not image Analyst, but I'm guessing you will get a better answer if you describe your desired image. Personally I don't see a lot of noise in your image. Do you want smoother edges? Do you want to fill the small black areas inside the main blob?

[rsnandi]

Thanks Jonas , yes I want to smoother edges and fill the black area inside the main blob. Morphological operations not doing good. They deform the main blobs. Please suggest something. Thanks

Answer 1

[Image Analyst]

You could blur the image and threshold it.

windowWidth = 7; % Whatever - bigger gives more smoothing, experiment with different values.
kernel = ones(windowWidth, windowWidth) / windowWidth^2;
smoothBW = conv(single(bw), kernel, 'same') > 0.5;

Or you could use a savitzky Golay filter to smooth the boundaries and then use poly2mask on the smoothed boundaries. Demo attached.

Or you could use activecontour(). Demo attached.

[Image Analyst]

rsnandi, are you still there????