zigzag line to straigth and removing unwanted lines at the edges

may be i am not able to express my question in most technical way . i m trying to read the boundaries and i get zigzag lines.. i want to change them to or straigt lines plus i get edges which are not required only the polyshape is needed.

[jahanzaib ahmad]

straight or curve

Answer 1

[jahanzaib ahmad]

GOT IT ..

I=bwmorph(I1, 'spur', 50);