numpy计算

import numpy as np
import cv2
from PIL import Image
#lenna.jpg
# Create a black image
#img=np.zeros((512,512,3), np.uint8)

#Python-opencv划线/画圆/椭圆/添加文字 - CSDN博客 https://blog.csdn.net/gan_player/article/details/78332152
#python+opencv图像金字塔融合 （超详细讲解原理及代码讲解） http://www.360doc.com/content/17/0912/21/10408243_686609527.shtml
imgname='lenna.jpg'
img=cv2.imread(imgname)
w,h =img.shape[1], img.shape[0]

# resize_factor=1.2
# mid_icon_w, mid_icon_h=int(w*resize_factor),int(h*resize_factor)
# img=img.resize((mid_icon_w, mid_icon_h), Image.ANTIALIAS)
imgname2='qq.JPG'
img2=cv2.imread(imgname2)
w2,h2 =img2.shape[1], img2.shape[0]

rows, cols, channels = img2.shape

img[10:10+rows,10:10+cols] = img2  # 把添加了logo的该区域赋值回原来的地方


#mid_icon_w,mid_icon_h=1024,1024
# img=img.resize((mid_icon_w, mid_icon_h), Image.ANTIALIAS)
# Draw a diagonal blue line with thickness of 5 px
#cv2.line(img,(0,0),(511,511),(255,0,0),5)

#draw rectangle
#cv2.rectangle(img,(384,0),(510,128),(0,255,0),3)

#draw circle

step,r_=80,50

#cv2.circle(img,(50,63), 63, (0,0,255), -1)

# circle(img, center, radius, color, thickness=None, lineType=None, shift=None)
for i in range(5):
    img=cv2.circle(img, ((i+1)*step, (i+1)*step), r_, (0, 0, 255), -1)

#draw ellipse
#cv2.ellipse(img,(256,256),(100,50),30,0,360,255,3)

#draw multi-lines
#pts=np.array([[10,5],[20,30],[70,20],[50,10]], np.int32)
#pts=pts.reshape((-1,1,2))
#cv2.polylines(img,[pts],True,(0,0,255),3)#如果去掉中括号，只是画四个点

#add words
font=cv2.FONT_HERSHEY_SIMPLEX
cv2.putText(img,'OpenCV',(10,500), font, 4,(255,255,255),2)

cv2.imshow('opencv',img)
cv2.imwrite('C:\imageVideo\my.jpg',img)

cv2.waitKey(0)
cv2.destroyAllWindows()
cv2.waitKey(1)
cv2.waitKey(1)
cv2.waitKey(1)
cv2.waitKey(1)

d=9