如何将图像文件导入 python，将其作为数组读取，然后将 output 数组作为相同的图像文件类型

Question

I am tasked with writing a program that can take an image file as input, then encrypt the image with some secondary code that i have already written, and finally output the encrypted image file.

I would like to import an image, make it a 1d array of numbers, perform some encryption on this 1d array (which will make it into a 2d array which i will flatten), and then be able to output the encrypted 1d array as an image file after converting it back to whatever format it was in on input.

I am wondering how this can be done, and details about what types of image files can be accepted, and what libraries may be required. Thanks

EDIT: this is some code i have used, img_arr stores the image in an array of integers, max 255. This is what i want, however now i require to convert back into the original format, after i have performed some functions on img_arr.

from PIL import Image
    img = Image.open('testimage.jfif')
    print('img first: ',img)
    img = img.tobytes()
    img_arr=[]
    for x in img:
          img_arr.append(x)
    img2=Image.frombytes('RGB',(460,134),img)
    print('img second: ',img2)

my outputs are slightly different

img first: <PIL.JpegImagePlugin.JpegImageFile image mode=RGB size=460x134 at 0x133C2D6F970>
img second: <PIL.Image.Image image mode=RGB size=460x134 at 0x133C2D49EE0>

Answer 1

In programming, Base64 is a group of binary-to-text encoding schemes that represent binary data (more specifically, a sequence of 8-bit bytes) in an ASCII string format by translating the data into a radix-64 representation.

Fortunately, you can encode and decode the image binary file with python based on base64. The following link helps you.

Encoding an image file with base64