作用：刪除影象的小的干擾項

原始碼如下：

# -*- coding=GBK -*-
import cv2 as cv


#影象的開閉操作
def open_image(image):
    gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)
    ret, binary = cv.threshold(gray, 0, 255, cv.THRESH_BINARY | cv.THRESH_OTSU)
    cv.imshow("二值化", binary)
    kernel = cv.getStructuringElement(cv.MORPH_RECT, (5, 5))
    binary = cv.morphologyEx(binary, cv.MORPH_OPEN, kernel)
    cv.imshow("開操作", binary)


def close_image(image):
    gray = cv.cvtColor(image, cv.COLOR_BGR2GRAY)
    ret, binary = cv.threshold(gray, 0, 255, cv.THRESH_BINARY | cv.THRESH_OTSU)
    kernel = cv.getStructuringElement(cv.MORPH_RECT, (5, 5))
    binary = cv.morphologyEx(binary, cv.MORPH_CLOSE, kernel)
    cv.imshow("閉操作", binary)


src = cv.imread("C://1.jpg")
cv.imshow("原來", src)
open_image(src)
close_image(src)
cv.waitKey(0)
cv.destroyAllWindows()
 

執行結果如下：