python - 使用opencv python从二值图像中去除小白点

Question

我有一个二值图像，我想使用opencv python从图像中删除小白点。您可以在这里引用我的问题enter link description here

我的原图是

我希望输出图像为:

Answer 1

这似乎可以在 Python Opencv 中使用连接的组件。

#!/bin/python3.7

import cv2
import numpy as np

src = cv2.imread('img.png', cv2.IMREAD_GRAYSCALE)

# convert to binary by thresholding
ret, binary_map = cv2.threshold(src,127,255,0)

# do connected components processing
nlabels, labels, stats, centroids = cv2.connectedComponentsWithStats(binary_map, None, None, None, 8, cv2.CV_32S)

#get CC_STAT_AREA component as stats[label, COLUMN] 
areas = stats[1:,cv2.CC_STAT_AREA]

result = np.zeros((labels.shape), np.uint8)

for i in range(0, nlabels - 1):
    if areas[i] >= 100:   #keep
        result[labels == i + 1] = 255

cv2.imshow("Binary", binary_map)
cv2.imshow("Result", result)
cv2.waitKey(0)
cv2.destroyAllWindows()

cv2.imwrite("Filterd_result.png, result)

参见here