Hi, what are all those tiny dots around the center of the image? In the center, you clearly have some lines. You could do the following to distinguish the lines:
b = double(imread('tomo.png'))/255;
a = rgb2gray(b);
H1 = fspecial('sobel');
H2 = H1';
hor=imfilter(a,H1);
ver=imfilter(a,H2);
mag = sqrt( hor.^2 + ver.^2 );
ori = atan(ver./hor);
ang=(ori+pi).*(ori<0)+ori.*(ori>=0);
mag_pi = mag./pi;
mask1 = (mag_pi>=0.2);
lines = medfilt2(mask1,[5 5]);
imagesc(a); colormap gray;
figure
imagesc(lines); colormap gray
Well, this solution is based on edge detection. What you could also do is tho find the skeleton of those lines using skiz
