#coding:utf-8
import Image as img
import numpy as np
import matplotlib.pyplot asplt
img=np.array(img.open("a.png"))
width=img.shape[0]
height=img.shape[1]
for i in range (height+1):
for jin range (width+1):
img[i][j]=img[i][width]-img[i][j]
plt.imshow(img)
plt.show()
I'm a beginner at python, but I wrote a code to flip the image from side to side.
img[i][j]=img[i][width]-img[i][j]
IndexError: index512 is out of bounds for axis0 with size512
The error appears.
By the way, the image is a color image with width=height=512.
I somehow understand what the error is saying, but how can I fix it?
heightHeight and widthwidthI think I gave you the initial value in reverse.Try the following:
import numpy as np
import matplotlib.pyplot asplt
img=np.array(img.open("a.png"))
plt.imshow(img)
height=img.shape[0]
width=img.shape[1]
for i in range (height):
for jin range (width):
img[i][:]=img[i][::-1]
plt.imshow(img)
plt.show()
Generally speaking, if you want the array a to be reverse order, I think a[:-1] is faster.
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