實現效果

第一張圖為原圖，其餘的圖為分割後的圖形

程式碼實現：

# -*-coding:utf-8-*-
import numpy as np
import cv2

#----------------------------------------------------------------------
def obj_clip(img,foreground,border):
  result = []
  height,width = np.shape(img)
  visited = set()
  for h in range(height):
    for w in range(width):
      if img[h,w] == foreground and not (h,w) in visited:
        obj = visit(img,height,width,h,w,visited,border)
        result.append(obj)
  return result
#----------------------------------------------------------------------
def visit(img,border):
  visited.add((h,w))
  result = [(h,w)]
  if w > 0 and not (h,w-1) in visited:
    if img[h,w-1] == foreground: 
      result += visit(img,w-1,border)
    elif border is not None and img[h,w-1] == border:
      result.append((h,w-1))
  if w < width-1 and not (h,w+1) in visited:
    if img[h,w+1] == foreground:
      result += visit(img,w+1,w+1] == border:
      result.append((h,w+1))
  if h > 0 and not (h-1,w) in visited:
    if img[h-1,w] == foreground:
      result += visit(img,h-1,border)
    elif border is not None and img[h-1,w] == border:
      result.append((h-1,w))
  if h < height-1 and not (h+1,w) in visited:
    if img[h+1,w] == foreground :
      result += visit(img,h+1,border) 
    elif border is not None and img[h+1,w] == border:
      result.append((h+1,w))
  return result
#----------------------------------------------------------------------
if __name__ == "__main__":
  import cv2
  import sys
  sys.setrecursionlimit(100000)
  img = np.zeros([400,400])
  cv2.rectangle(img,(10,10),(150,150),1.0,5)
  cv2.circle(img,(270,270),70,5)
  cv2.line(img,(100,0.5,5)
  #cv2.putText(img,"Martin",(200,200),5)
  cv2.imshow("img",img*255)
  cv2.waitKey(0)
  for obj in obj_clip(img,0.5):
    clip = np.zeros([400,400])
    for h,w in obj:
      clip[h,w] = 0.2
    cv2.imshow("aa",clip*255)
    cv2.waitKey(0)

總結

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