如何保存从python中的图像转换的数组？ [复制]

Question

任务是读取图像并提取数据以获得 25 x 25 像素的网格。我用这段代码来提取它，我得到了数据。但是我应该如何将其保存在文本文件中以查看整个 25 x 25 数组？

我刚刚将图像转换为这样的数组：

>>> img=cv2.imread("1670.png",0)
>>> img=cv2.imread("1670.png",0)

>>> img
array([[14, 15, 15, ..., 92, 91, 92],
[14, 15, 15, ..., 93, 93, 91],
[15, 15, 16, ..., 94, 93, 91],
...,
[69, 71, 76, ..., 73, 70, 68],
[69, 75, 81, ..., 76, 72, 69],
[69, 76, 81, ..., 80, 75, 71]], type=uint8)

我想将它作为 25 x 25 数组保存到文本文件中。我该怎么做？

Answer 1

用几个不同的文件转换写了一个小脚本：

# -*- coding: utf-8 -*-
"""
Created on Fri Mar 09 15:53:54 2018
@author: soyab
"""

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from scipy.misc import imread, imsave, imresize

#%%
## Read photo ; view photo
img = imread('new_photo.jpg')
plt.imshow(img)

#%%
## Treat as a Numpy array
np.shape(img)
newimg = img[:25,:25,:][:,:,0] ## Take a 25x25 slice from a 
np.shape(newimg)               ##  three 'layer' photo
plt.imshow(newimg)

#%%
## Save as a jpeg ; visual check
imsave('modify_new_photo.jpg',newimg)
nextimg = imread('modify_new_photo.jpg')
plt.imshow(nextimg)

#%%
## Using a Pandas Dataframe ; like a Kung Fu Panda
### Save as .txt or .csv ; reload as a pd.DataFrame
#### Review again as an image
nextimg = pd.DataFrame(nextimg)
nextimg.to_csv('modify_nextimg.txt',header=False,index=False)
fimg = pd.read_csv('modify_nextimg.txt')
plt.imshow(fimg)