继续犯同样错误
水平线总是结果。尝试显示随机点。

import cv2 as cv, numpy as np, random
blank = np.ones((300,300), np.uint8) * 255

X, Y = [], []

for i in np.arange(1,300,1):
    X.append(random.randrange(1,300))
for i in np.arange(1,300,1):
    Y.append(random.randrange(1,300))

XY = np.column_stack((np.asarray(X),np.asarray(Y)))

# change values of Vertex index to black. 
blank[XY] = 1

cv.imshow('', blank)
cv.waitKey(0)
cv.destroyAllWindows()

随机像素阵列。