OpenCV - 刪除圖像中的獨立短線

Question

如何刪除短線和斷開的線，但保留下圖中的所有其他連接線？

Answer 1

如果圖像始終這口井相連，你可以選擇基於其大小的組件。我在Python代碼（可能是一個更簡單的方法，但這是我如何做到這一點）：

#get all connected components in the image with their stats (including their size, in pixel) 
nb_edges, output, stats, _ = cv2.connectedComponentsWithStats(img, connectivity=8) 
#output is an image where every component has a different value  
size=stats[1:,-1] #extracting the size from the statistics 

#selecting bigger components 
for e in range(0,nb_edges-1): 
    #replace this line depending on your application, here I chose to keep 
    #all components above the mean size of components in the image 
    if size[e]>=np.mean(size): 
     th_up = e + 2 
     th_do = th_up 

     #masking to keep only the components which meet the condition 
     mask = cv2.inRange(output, th_do, th_up) 
     result = cv2.bitwise_xor(original_img, mask)