python numpy生成随机图

# -*- coding: utf-8 -*-

import numpy as np
import cv2

grayImage=np.random.randint(0, 255, (400, 400))
cv2.imshow("GRAY", grayImage.astype(np.uint8))

bgrImage=np.random.randint(0, 255, (400, 400,3))
cv2.imshow("bgr", bgrImage.astype(np.uint8))
# cv2.imshow("BGR", bgrImage)
cv2.waitKey(0)

python 生成随机圆

以下内容转自：

OpenCV python 绘制随机实心圆

import numpy as np
import cv2

def main():

    # 1.创建白色背景图片
    d = 400
    img = np.ones((d, d, 3), np.uint8) * 255

    # 2.循环随机绘制实心圆
    for i in range(0, 100):
        # 随机中心点
        center_x = np.random.randint(0, high=d)
        center_y = np.random.randint(0, high=d)

        # 随机半径与颜色
        radius = np.random.randint(5, high=d/5)
        color = np.random.randint(0, high=256, size=(3, )).tolist()

        cv2.circle(img, (center_x, center_y), radius, color, -1)

    # 3.显示结果
    cv2.imshow("img", img)
    cv2.waitKey()
    cv2.destroyAllWindows()

if __name__ == '__main__':
    main()