Puzzle 6.04 discussion/help (spoilers inside)

[Spoon]

Hey everyone, not having much luck with this puzzle.

Here's what I figured out so far (I think I'm on the right track, but missing a step somewhere):
The [IMG] at the top indicates this is a form of least significant bit (LSB), so I assume it is a 4x4 greyscale pic with pixel values either meant to be 255 or 0.

So after jotting some things down i get
using LSB i get the following 4x4:
0101
0000
0100
0111

Then:
converting binary -> dec -> ascii -> i get the letters P G (which sadly isn't the answer

Anyone have any tips or able to point me in the right direction?

[Venceremos]

Stuck here as well, in desperation I tried this thing: https://www.dcode.fr/binary-character-shape

As its url indicates, it’s steganographic thing and converts binary code into characters and vice versa but it came up with gibberish as well, so...

[Eraser]

I'm also stuck here. It's the only non-challenge puzzle remaining for me.

I also tried more stuff. None of these worked for me:

- Reading those bits in a different order. For instance, reading the columns 2 by 2 you get 0100 0101 0100 0011 => ASCII letters EC (also not the answer).

- Reading the bits as a number sequence.

- Reading the bits in groups of 4 or 5 and using the encoding A=1 Z=26 or A=0 Z=25.

[Spoon]

ok so i guessed the answer, even knowing the answer I still can't figure out the way to come to the answer... but what I was doing must have been on the right track S:

[psim_]

Can you confirm whether the solution consists of two letters? It would seem to make sense to go from the 16 pixels of the image to two binary letters somehow.

[Spoon]

No. the answer has a length of 4

[psim_]

Aaaaand back to the drawing board. Thanks.

[psim_]

any general hint you'd like to drop that isn't too obvious? assuming you figured out why your solution was correct in the first place.

[Curious Duck]

I have no clue where to start with this.

[psim_]

I guess the idea is that we have a greyscale image of 4x4 pixels. Each pixel is either black (0000 0000) or white (1111 1111). But somebody is using the last bit of these numbers to hide some additional information in the image, so some pixels are set to 1111 1110 or 0000 0001. If you just look at the image, you wouldn't notice, because there's no big difference between 254 and 255, but if you actually look at the bytes, as we do, you can see what was changed.

So far, so good. How we should use this to get a solution I still haven't figured out.

[Spoon]

PG is correct, as i said it has a length of 4. I just used that knowledge + the title to guess the other 2 characters

[psim_]

Ok, that worked. Somehow it feels like we skipped a step somewhere, though?

[Spoon]

yeah even going back knowing the solution I dont know how to get the other 2 characters

[psim_]

oh i have it, let me make a figure. haha.

[Curious Duck]

I am so confused.

[psim_]

I even drew this in my notebook and have been staring at it for 2 days and I never noticed until now. But who looks for a friggin DOT! :D
https://imgur.com/a/GY5M9