Opencv學習筆記——繪製幾何圖

以下均爲github上opencv的個人學習筆記，原路徑如下：

https://github.com/JimmyHHua/opencv_tutorials

源碼示例：

import cv2 as cv
import numpy as np

image = np.zeros((512,512,3) , dtype = np.uint8)

cv.rectangle(image,(100,100),(300,300),(255,0,0),2,cv.LINE_4,0)
cv.circle(image,(256,256), 50, (0,0,255),2,cv.LINE_8,0)
cv.ellipse(image,(256,256),(150,50),360,0,360,(0,255,0),2,cv.LINE_8,0)
cv.imshow("image", image)
cv.waitKey(0)

for i in range(100000):
    image[:,:,:] = 0
    x1 = np.random.rand() * 512
    y1 = np.random.rand() * 512
    x2 = np.random.rand() * 512
    y2 = np.random.rand() * 512
    
    b = np.random.randint(0,256)
    g = np.random.randint(0,256)
    r = np.random.randint(0,256)
    
    cv.rectangle(image,(np.int(x1),np.int(y1)),(np.int(x2),np.int(y2)),(b,g,r),1,cv.LINE_8,0)
    cv.imshow("imshow", image)
    
    c = cv.waitKey(20)
    if c == 27:
        break
    
cv.imshow("image",image)
cv.waitKey(0)
cv.destroyAllWindows()

cv.rectangle用法：

cv.circle用法：

cv.ellipse用法：

其他函數具體內容請參見：

https://docs.opencv.org/2.4/modules/core/doc/drawing_functions.html