I have been trying to remove the noise in an image (image1.png). I have been using the median filter and bwareaopen commands. I just need the center bright white portion as in image2.png. It would be great if anyone could help.
jpgFilename = strcat( num2str(k), '.bmp');
imageData = imread(jpgFilename);
BW2 = bwareaopen(imageData,2);
b = imsharpen(BW2,'Amount',8);
se = offsetstrel('ball',2,2);
b = imdilate(b,se);
BW3 = bwareaopen(b,2);