将图像(png)转换为矩阵，然后转换为一维数组 [英] Convert Image ( png ) To Matrix And Then To 1D Array

问题描述

我有5张图片，我想将每个图像转换为1d数组并将其作为矢量放置在矩阵中.
我希望能够再次将每个矢量转换为图像.

I have 5 pictures and i want to convert each image to 1d array and put it in a matrix as vector.
I want to be able to convert each vector to image again.

img = Image.open('orig.png').convert('RGBA')
a = np.array(img)

我不熟悉numpy的所有功能，想知道是否还有其他工具可以使用.
谢谢.

I'm not familiar with all the features of numpy and wondered if there other tools I can use.
Thanks.

推荐答案

import numpy as np
from PIL import Image

img = Image.open('orig.png').convert('RGBA')
arr = np.array(img)

# record the original shape
shape = arr.shape

# make a 1-dimensional view of arr
flat_arr = arr.ravel()

# convert it to a matrix
vector = np.matrix(flat_arr)

# do something to the vector
vector[:,::10] = 128

# reform a numpy array of the original shape
arr2 = np.asarray(vector).reshape(shape)

# make a PIL image
img2 = Image.fromarray(arr2, 'RGBA')
img2.show()

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