python + opnencv achieve hole filling image

CV2 Import 
Import numpy NP AS 

path = "_holefill.jpg" 
IMG = cv2.imread (path) 
Gray = cv2.cvtColor (IMG, cv2.COLOR_BGR2GRAY) # is converted into grayscale 
ret, thresh = cv2.threshold (gray, 50 , 250, cv2.THRESH_BINARY_INV) # grayscale converted into a binary image 
thresh_not = cv2.bitwise_not (complement thresh) # binary image 

kernel = cv2.getStructuringElement (cv2.MORPH_ELLIPSE, (3,3 )) # 3 × 3 structure element 

"" " 
construction of the array F, and writes the boundary value F thresh_not 
" "" 
F. = np.zeros (thresh.shape, np.uint8) 
F. [:, 0] = thresh_not [:, 0] 
F. [ :, -1] = thresh_not [:, -1] 
F [0,:] = thresh_not [0,:] 
F [-1,:] = thresh_not [-1,:] 

"" " 
loop iterations to be F expansion operation, and the operation result performed thresh_not 
"" " 
for I in Range (200 is):
    = Cv2.dilate F_dilation (F., Kernel, Iterations =. 1) 
    F. = Cv2.bitwise_and (F_dilation, thresh_not) 

Result = cv2.bitwise_not (F.) For a result of performing # Not 

# Display results 
cv2.imshow ( 'p', result) 
cv2.imshow ( 'R & lt', Thresh) 
cv2.waitKey (0)