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import matplotlib.pyplot as plt
import matplotlib.image as mpimg
import numpy as np

img=mpimg.imread('test.jpeg')
img.ndim
img.shape
plt.imshow(img)
plt.show()

img.ndim,img.shape

img_20=np.zeros((500,375,3))
img_20.shape

for i in range(375):
    for j in range(500):
        img_20[j,i,:]=img[i,j,:]
        
plt.subplot(1,2,1),plt.imshow(img)
plt.subplot(1,2,2),plt.imshow(img_20)

plt.show()

img[:,100,:].max()

img_1=img[1:375:2,:,:]

img_1=img[:,1:500:2,:]

plt.subplot(1,2,1),plt.imshow(img)
plt.subplot(1,2,2),plt.imshow(img_1)
plt.show()

img_30=np.zeros((500,375,3))
img_30.shape
for i in range(375):
    for j in range(500):
        img_30[j,i,:]=1-img[i,j,:]
        #img[i,j,:]

img_40=np.zeros((375,500,3))
img_40.shape
for i in range(375):
    for j in range(500):
        img_40[375-i-1,500-j-1,:]=1-img[i,j,:]
img_50=np.zeros((375,500,3))
img_50.shape
for i in range(375):
    for j in range(500):
        img_50[375-i-1,j,:]=1-img[i,j,:]
plt.subplot(2,3,1),plt.imshow(img)
plt.subplot(2,3,2),plt.imshow(img_20)
plt.subplot(2,3,3),plt.imshow(img_30)
plt.subplot(2,3,4),plt.imshow(img_30)
plt.subplot(2,3,5),plt.imshow(img_40)
plt.subplot(2,3,5),plt.imshow(img_50)
plt.show()