python - 使用python库填充图像中的穿孔形状？

Question

我有带有“穿孔”的 BW 图像。穿孔级别可以不同

是否有任何“标准”方法可以用黑色完全填充形状以使它们更相似？

Pillow 和 opencv 是首选，但 imagemagick 也可以。

标签： pythonopencvimage-processingimagemagickpillow

Answer 1

您可以使用图像形态（即：关闭）来实现这一点。

import cv2
import numpy as np

if __name__ == '__main__':
    # read image
    image = cv2.imread('image.png',cv2.IMREAD_UNCHANGED)

    # convert image to gray
    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

    # ensure only black and white pixels exist
    ret,binary = cv2.threshold(gray, 0, 255, cv2.THRESH_BINARY)

    # morphology works with white forground
    binary = cv2.bitwise_not(binary)

    # get kernel for morphology
    kernel = cv2.getStructuringElement(cv2.MORPH_RECT, (3,3))
    # number of iterations depends on the type of image you're providing
    binary = cv2.morphologyEx(binary, cv2.MORPH_CLOSE, kernel, iterations=3)

    # get black foreground
    binary = cv2.bitwise_not(binary)

    cv2.imshow('image', binary)
    cv2.waitKey(0)
    cv2.destroyAllWindows()