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Straight line through center of polygon

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I have polygon ROI and I need to draw a straight line through the center of the polygon and through the middle of superior (S1 & S2) / inferior (I1 & I2) points of the ROI. In my case, the ROI polygons are of various sizes and shapes. I am attaching a picture of a sample ROI of my work. Please help me regarding this.

Accepted Answer

KSSV on 24 May 2021
Edited: KSSV on 24 May 2021
If you have the vertices of the polygon, you can fit a striaght line and draw it.
P = [0 0 ; 1 0 ; 1 1 ; 0 1] ; % vertices of the polygon
p = polyfit(P(:,1),P(:,2),1) ; % fit a striaght line
xi = P(:,1) ;
yi = polyval(p,xi) ;
hold on
Sunetra Banerjee
Sunetra Banerjee on 24 May 2021
If I be more specific, I need the vertices of the polygon.

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