How to convert hex string to color image in python?

Question

i'm new in programming so i have some question about converting string to color image.

i have one data , it consists of Hex String, like a fff2f3..... i want to convert this file to png like this.

i can convert the hex data to png image through this site but i don't know how to convert the hex data to png image using python code but i tried to use Image.frombytes('RGB',(1600,1059),hex_str) but i don't know image size , so i cannot use this method.

so My question is how can i convert this hex data to image using python code

please give me some advise , thank you :)

How many pixels are in the data? Knowing the number of pixels might help figuring out the heighth and width ... H * W == number_of_pixels. — wwii
– wwii, Commented Jul 16, 2018 at 2:46
If there are 65536 characters in the string and the image is 'RGBA' then there are 8 characters per pixel which would be 8192 pixels - so maybe the image size is 128x64 or 256x32 ... — wwii
– wwii, Commented Jul 16, 2018 at 2:56
@wwii thanks for comment, I don't think ,the image size is 128x64 or 256x32 , becuase when i recover image from string using the web program that i mentioned above, the image size is 600 x 1590, so my question is how web program that convert string to image can know image size , even my string file is broken , thank you — Soulduck
– Soulduck, Commented Jul 17, 2018 at 4:37
@IgnacioVazquez-Abrams thank you for comments , because i just have string file and my files almost broken , so i don't know the image size exactly, — Soulduck
– Soulduck, Commented Jul 17, 2018 at 4:39

Alistair Carscadden · Accepted Answer · 2018-07-27 09:03:00Z

9

Reading the hexadecimal string into a bytes object, and then writing that binary into a .png file can be done like this:

with open('binary_file') as file:
    data = file.read()

data = bytes.fromhex(data[2:])

with open('image.png', 'wb') as file:
    file.write(data)

And produces this result, keep in mind it is corrupted:

answered Jul 27, 2018 at 9:03

Alistair Carscadden

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3 Comments

Jack Hales Over a year ago

I know this old, but I just wanted to add that .strip() fixed my ended issue. I was importing text from a text editor that enjoyed making subtle changes to the raw file, including an extra \n at end (Atom editor).

coder101 Over a year ago

@Alistair: Does this work the same way in C?

Alistair Carscadden Over a year ago

@coder101 Yes, there is nothing language specific about the solution. It will have to be translated, of course.

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