recreate the image using the extracted bites and saved in a txt file

Question

I'm trying to extract the binary information from an image (like \ xff), and save it into a text file. Ultimately, I should also be able to reverse the effect, and generate an image from the text file.

I'm using the code below to try to create the text file; it does not throw an error, but the text generated does not generate an image. Here is an example of the contents of one of the text files created by this code.

file = open(image, "rb")
data = file.read()
file.close()


file = open(txt file, "w")
file.write(str(data))
file.close()

sorry I forgot file.write(str(data)) instead of file.write(data) — bob, Dec 31 '20 at 21:14
@ShapeOfMatter the program to recreate the images from the bites gives no error but when I open the .jpg file it does not show me any image — bob, Dec 31 '20 at 21:20
@bob you want to read your image bytes like 01 string and then convert these 01 to their original bytes again ? — DRPK, Dec 31 '20 at 21:27
@DRPK I would like to convert an image to bits and save all those bits to a txt file and then use that txt file to create the image — bob, Dec 31 '20 at 21:38
You cannot convert a bytes object to a str using ```file.write(str(data))```. You have to define an encoding. I do not understand your intention. — Detlef, Dec 31 '20 at 22:05

score 1 · Answer 1 · answered Jan 01 '21 at 03:57

You should read/write your files on binary mode with "rb" and "wb" attributes on open() function:

Try this:

with open(image1, "rb") as input_file:
    data = input_file.read()

with open(image2, "wb") as output_file:
    output_file.write(data)

But if you want to convert your target file bytes to bits (01) and save them and reverse this job again you can simply use numpy package:

Try This:

import numpy as np

Bytes = np.fromfile("image1.png", dtype="uint8")
Bits = np.unpackbits(Bytes)


with open("bits.txt", "w") as export_bits:
    export_bits.write("".join(list(map(str, Bits))))

with open("bits.txt", "r") as load_bits:
    string_bits_data = list(map(int, load_bits.read()))


save_new_image = np.packbits(string_bits_data).astype('int8').tofile("image2.png")
print("Done")

Credits to mikhail-v (UID: 4157407) from: Convert bytes to bits in python.

recreate the image using the extracted bites and saved in a txt file

1 Answers1