how to find overlapped connected components

After I calculate the bounding boxes of each connected components , I want to extract all the vertically overlapped connected components ( completely overlapped , partially overlapped from right side and from left side) what is the best way to do it ?

this is part of my code:

fobr = imread(image);

s1 = regionprops(fobr);

X=[];

Y=[];

for i = 1:numel(s1)

    X =[X; s1(i).BoundingBox(1) s1(i).BoundingBox(3)+ s1(i).BoundingBox(1)];
    Y =[Y; s1(i).BoundingBox(2) s1(i).BoundingBox(4)+ s1(i).BoundingBox(2)];

end

this is X

X =

   1.0e+03 *

    0.0345    0.0935
    0.1035    0.1565
    0.1815    0.2175
    0.1915    0.2825
    0.2745    0.2895
    0.3175    0.3615
    0.3655    0.5105
    0.3845    0.4085
    0.3965    0.4725
    0.4515    0.4935
    0.5445    0.6145
    0.6515    0.8065
    0.8095    0.8525
    0.8575    0.8825
    0.8775    0.8865
    0.9005    1.0925
    1.1185    1.1295
    1.1635    1.4325
    1.4605    1.5395
    1.5435    1.5785
    1.5665    1.5765
    1.6215    1.6655
    1.6365    1.7265
    1.7075    1.8905
    1.7085    1.7665
    1.7985    1.8275
    1.8985    1.9675
    1.9775    2.1185