opencv_tutorials/python/code_040/opencv_040.py at master · HZHCoder1990/opencv_tutorials · GitHub

30 lines (23 loc) · 591 Bytes

import cv2 as cv

import numpy as np

src = cv.imread("./test.png")

cv.namedWindow("input", cv.WINDOW_AUTOSIZE)

cv.imshow("input", src)

T = 127

# 转换为灰度图像

gray = cv.cvtColor(src, cv.COLOR_BGR2GRAY)

h, w = gray.shape

T = cv.mean(gray)[0]

print("current threshold value : ", T)

# 二值图像

binary = np.zeros((h, w), dtype=np.uint8)

for row in range(h):

for col in range(w):

pv = gray[row, col]

if pv > T:

binary[row, col] = 255

else:

binary[row, col] = 0

cv.imshow("binary", binary)

cv.waitKey(0)

cv.destroyAllWindows()

Expand file tree