Smoothing Edges of a Binary Image

Question

How to smooth the edges of this binary image of blood vessels obtained after thresholding.

I tried a method somewhat similar to this method but did not qui

Answer 1

You can dilate then erode the areas http://docs.opencv.org/2.4/doc/tutorials/imgproc/erosion_dilatation/erosion_dilatation.html.

import cv2
import numpy as np
blur=((3,3),1)
erode_=(5,5)
dilate_=(3, 3)
cv2.imwrite('imgBool_erode_dilated_blured.png',cv2.dilate(cv2.erode(cv2.GaussianBlur(cv2.imread('so-br-in.png',0)/255, blur[0], blur[1]), np.ones(erode_)), np.ones(dilate_))*255)  

EDIT whith a scale facor off 4 before the stuff