#Day 1 # learning content: an image reading, display, delete, save as, read and modify pixel,

1 #day 
# learning content: an image reading, display, delete, save as, read and modify pixel, 
Import CV2 
Import numpy AS NP 

Image = cv2.imread ( "D: \ OpenCV \ CVproject \ Image / lenacolor.png" ) # image reading 
cv2.imshow ( "show", image) # image display

#ROI face extraction 
A np.ones = (( 100, 100, . 3)) 
A = Image [ 200 is: 390, 230: 350] #lenacolor face location 
cv2.imshow ( "face1", A) 
Image [ 0: 190, 0: 120] A = 
cv2.imshow ( "face2", image) # an image projecting face parts 


#BGR three separate pixels 
B, G, R & lt cv2.split = (image) # may be a single extraction b = cv2.split (image) [0] 
cv2.imshow ( "Blue", B) 

Print (image.shape) # output image row, a column, the channel 
rows, cols, CHN image.shape = 
G = np.zeros (( rows, cols), image.dtype) # orderg channels 0 
R & lt np.zeros = ((rows, cols), image.dtype) 
m = cv2.merge ([B, g, R & lt]) 
cv2.imshow ( "Merge", m) 



cv2.imwrite ( "D : \ OpenCV \ Image / merge.jpg ", m) # Save window as 



cv2.waitKey ( 0) # window waiting 
cv2.destroyAllWindows () # window delete