OpenCV004：空白图片生成与基本图形绘制

Posted 2021-03-08 enumx

#https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_drawing_functions/py_drawing_functions.html#drawing-functions
###########################################
####Import Module                      ####
import numpy as np  
import cv2  
#create a black use numpy,size is:512*512
img = np.zeros((512,512,3), np.uint8)   
#fill the image with white
img.fill(255)
###########################################
####Main Function                      #### 
#draw 
#        start x  y end x    y      color
cv2.line(img, (10,50), (511, 511), (255,0,0), 5) 
cv2.rectangle(img, (384,0), (510, 128), (0, 255, 0), 3)
cv2.circle(img, (447, 63), 63, (0,0,255), -1) 
cv2.ellipse(img, (256,256), (100,50),45,0,290,(0,0,255),-1)
font = cv2.FONT_HERSHEY_SIMPLEX  
cv2.putText(img, 'Hello', (10,500), font, 4, (255,2,255), 2)  
cv2.imshow('image', img)  
cv2.waitKey(0)  
cv2.destroyAllWindows()