How to read images in python?

How to read images in python?

Method 1: Use the Image function in PIL. This function reads The output is not in array format

At this time, you need to use np.asarray(im) or np.array() function

The difference is that np.array() is a deep copy, and np.asarray() is Shallow copy

from PIL import Image
import numpy as np
 
I = Image.open('./cc_1.png') 
I.show()    
I.save('./save.png')
I_array = np.array(I)
print I_array.shape

Method 2: Use matplotlib.pyplot as plt to display images

# matplotlib.image as mpimg is used to read images

# and read them out It is array format

import matplotlib.pyplot as plt
import matplotlib.image as mpimg
import numpy as np
I = mpimg.imread('./cc_1.png')
print I.shape
plt.imshow(I)

Method three: Use the opencv-python interface

#cv2.imread() to read out the same array format, but if it is a single-channel image, it will read out three Channel

import cv2
I = cv2.imread('./cc_1.png')
print I.shape

Method 4: To access images, I generally like to use the scipy library, which reads it in matrix form and saves it in the form of (H, W, C)

import matplotlib.pyplot as plt
from scipy import misc
import scipy
I = misc.imread('./cc_1.png')
scipy.misc.imsave('./save1.png', I)
plt.imshow(I)
plt.show()

Method Five: Use skimage library

from skimage import io,data
img=data.lena()
io.imshow(img)

Related recommendations: "Python Tutorial"

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