python读取和保存图片5种方法对比

import copy 
a = [1, 2, 3, 4, ['a', 'b']] #原始对象 
b = a #赋值，传对象的引用 
c = copy.copy(a) #对象拷贝，浅拷贝 
d = copy.deepcopy(a) #对象拷贝，深拷贝 
a.append(5) #修改对象a 
a[4].append('c') #修改对象a中的['a', 'b']数组对象 
print 'a = ', a 
print 'b = ', b 
print 'c = ', c 
print 'd = ', d

a = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
b = [1, 2, 3, 4, ['a', 'b', 'c'], 5]
c = [1, 2, 3, 4, ['a', 'b', 'c']]
d = [1, 2, 3, 4, ['a', 'b']]

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

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)

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

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()

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