###機器學習和OpenCV for Python操作圖形檔案和圖形操作####
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from nupmy import *
ipmort cv2
win _name = 'mypicture' #視窗名稱
#CV2.window_mormal: 調整視窗大小
cv2.namedWindow(win_name,cv2.WINDOW_MORMAL) #0 黑白圖檔,1原×××片
img = cv2.imread ('mypicture.jpg',1) #顯示圖檔
cv2.waitkey(0)
cv2.destoryAllWindows() #銷毀建立的對象
######儲存圖檔:OpenCV 可将圖檔轉換為PGM格式#######
cv2.imwrite("paulwalke.mono.pgm",img)
#######Matplolib顯示圖檔#########
from matplotlib import python as plt
img = cv2.imread(‘paulwalker.mono.pgm’,0)#讀取黑白圖檔
plt.imshow(img,cmap = 'gray' , interpolation = 'bicubic')
plt.xticks({}),plt,yticks({}) #隐藏x,y坐标
############繪制直線and矩形####
img=zeros(512,512,3)
#起點,(0,0)終點(511,511),顔色(0,255,255) 像素:2
cv2.line(img,(0,255),(512,255),(0,255,255),2) #直線
左上角:(150,150);右小角:(350,350) 顔色:(255,255,0) 像素:2
cv2.imshow(‘p_w_picpath’,img)
cv2 .waitKey(0)
cv2.destoryALLindows()
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