Cracking Secret Message with C and Computer Vision

Рет қаралды 22,206

21 күн бұрын

Streamed Live on Twitch: / tsoding
Enable Subtitles for Twitch Chat
References:
- Tsoding - seam-carving - github.com/tsoding/seam-carving
- Seam Carving Playlist: • Seam Carving
- Tsoding - nn.h - github.com/tsoding/nn.h
- Source Code: github.com/tsoding/secret
Support:
- BTC: bc1qj820dmeazpeq5pjn89mlh9lhws7ghs9v34x9v9
- Pay for my VPS: zap-hosting.com/en/shop/donat...

Пікірлер: 80

@cobbcoding 19 күн бұрын

Tsoding literally solving his own ARG

@rogo7330 19 күн бұрын

> computer vision in title > adjusts grid by hand We've been tricked, we've been backstabbed and we've been, quite possibly, bamboozled.

@aquire9663 18 күн бұрын

it is quite common for real life cv apps to involve HITL cuz cv is not reliable on its own. i hope you were being ironical .

@b-rosa 19 күн бұрын

QR code 2 just dropped

@goesbypluto 19 күн бұрын

This is my first time seeing you start without doing the pinging discord stuff

@glowiak3430 19 күн бұрын

There will be a time when 2b2t players will use Zozin's notebook to hack NASA.

@LetterlessAlphabet 19 күн бұрын

I love that you did a really nice one line linear algebra and didn't even know why it worked. 😂 You subtracted the directional vector with the length of the distance from mouse to anchor from the positional vector of the target image.

@GoodHomeVideos 19 күн бұрын

This was one of my favorite streams so far. Really awesome from start to finish

@shrddr 19 күн бұрын

pretty sure it's going to spell out something about my mom

@RichardLofty 18 күн бұрын

Using edges is a mistake. Converting everything to black and white and then averaging saturation when sampling would be more stable. Also random sampling is unnecessary. You can "cut out" the square you want to test, blur it heavily until its basically one solid color and sample the middle once. Finding a threshold for that is easier because of 0 randomness.

@innokentiyromanchenko1450 17 күн бұрын

50:50 при проективном преобразовании центр квадрата перейдет в в пересечение средних линий, поэтому думаю точнее будет использовать вместо лерпа на одной линии использовать пересечение двух линий.

@Luis-qe8el 19 күн бұрын

Amazing stuff, your own animation lib... Keep the on the good work 💪

@Vlad-xh9sy 17 күн бұрын

In order to align the points perfectly, you had to account for lens distortion.

@RichardLofty 18 күн бұрын

Using edge detection is counterproductive. When you colored in the squares on paper, the point was to fill them in. Not make as many and as much pronounced edges as possible. So finding edges is wrong here. A better image processing would simplify all other steps. No random sampling would be needed, and activation threshold would be stable.

@ilkinnezer 19 күн бұрын

I am off for the next 2 hours

@suvetar 18 күн бұрын

@Tsoding, Have you tried the Intel C compiler? I believe it's available for both Windows and Linux - Considering your mastery of the base subject, I would love to know your thoughts on the compiler itself?! As always, Большое спасибо!

@b-rosa 19 күн бұрын

48:29 it is also called "region of interest" or just ROI

@cornjulio4033 19 күн бұрын

glorious episode again ! but I was really hoping you made the 4 corners draggable. PS: There is no H in threshold. it's Tresh-Old

@koktszfung 19 күн бұрын

The messages in the notebook are so secret that you can’t see them at all

@salim444 18 күн бұрын

it is crazy how tsoding writes the chat in caption. such a good example of diligent worker /s :D

@dkaaakd 19 күн бұрын

The correct way is to compute homography, otherwise deviations from fronto-parallel position will keep failing (because projective transformations are not linear). In 2d case computing homography by 4 points can be done using some elementary-school math.

@RenderDragon 19 күн бұрын

1:55:45 - the secret is revealed

@dabunnisher29 9 күн бұрын

I just started watching your videos, and holy shit your channel is fucking AWESOME SAUCE!!!

@chillydill4703 18 күн бұрын

Super interesting, this is something I actually need in my own app!

@user-tb9xv3fy8n 16 күн бұрын

I fucking love this channel.

@priyakdey7891 19 күн бұрын

Literally thought was gonna sleep early today. Fuck that shit. !!! 😁

@raina1565 19 күн бұрын

Will you ever do audio programming on stream? Like making a synth or an audio effect? Even a full on music making app

@MarcelRobitaille 18 күн бұрын

Just reading the grayscale seems fine. You could also use a Gaussian filter. Maybe then you would need samples just take the centre.

@LBCreateSpace 19 күн бұрын

Amazing 🙌

@Protoex 18 күн бұрын

You can clearly see the ascii upper case bit. Only white for H, W and I

@Ginto_O 19 күн бұрын

"For whatever reason" bruh

@blackhaze3856 19 күн бұрын

Solving Enigma machine

@llanomga 14 күн бұрын

I lol'd with: new UX has been discovered, who needs drag and drop?

@tehvvisard 16 күн бұрын

Instead of black and white couldn't you choose a pivot color using the mouse and measure the distance from that color to determent if the cell is on or off? Maybe even picking both pivots (on and off) and choosing which depending on shortest distance.

@artemiasalina1860 19 күн бұрын

@56:00 it looks like lens (wide angle lens) distortion that the program can't account for that is causing the misalignment, and/or that the notebook was screenshot at a slight angle from perpendicular to the viewing axis of the lens.

@artemiasalina1860 19 күн бұрын

Ok, a minute later the chat pointed it out.

@awfultrash888 19 күн бұрын

DAMnn thatt is so cool actually, zozeen is a freaking magician

@slendi9623 19 күн бұрын

its not funny how many times this has happened to me, just make something years ago, find it again, try to decode it.

@varshneydevansh 19 күн бұрын

Letsssss Zooooooooo

@hubstrangers3450 18 күн бұрын

Thank you....

@achiyazigi3869 19 күн бұрын

HARD CODING EVERYTHING EXCEPT THE BIT ARRAY pov

@TsodingDaily 19 күн бұрын

True automation right there.

@k0mpreni 19 күн бұрын

I don't know C, but I want. This is some serious ASMR video, would 100% recommend to my friends

@artemiasalina1860 19 күн бұрын

Very cool.

@yevheniitsybulskyi2020 19 күн бұрын

Notebook with raylib

@RealCatDev 4 күн бұрын

1:45:15 Tsoding switched language from english to russian and from russian to polish

@RealCatDev 4 күн бұрын

damn, I've predicted the future

@Oilhead710 19 күн бұрын

Let’s go 6:08

@xarchist 18 күн бұрын

Tsodiac coder.

@rubyciide5542 19 күн бұрын

When will i reach the babushka level in programming? ⚰️🥶

@MrBloodcount 19 күн бұрын

Can't wait to watch :)

@JamesSjaalman 18 күн бұрын

Brainfart: how about doing an FFT on the raw (normalised) cells and discarding (summing) the high frequencies (the ink-width) ? Just like scanning barcodes...

@blastygamez 18 күн бұрын

Horror, computer be like: I C u

@mbarrio 18 күн бұрын

37:18 "The revolution has begun" Great project, now I understand you've made a glorified QR reader!

@electronlabs2802 11 күн бұрын

@1:55:42 reveal secret message.

@kirillvoloshin2065 7 күн бұрын

we achieved AGI 😀😀😀

@YmliaW1iYXdwCgeqeq 13 күн бұрын

i thought you were germen hence why i followed .....

@YmliaW1iYXdwCgeqeq 13 күн бұрын

crysis

@alexander3293 19 күн бұрын

How old were you back then?

@jorenheit 19 күн бұрын

ageBackThen = currentAge - timeElapsed

@alexander3293 19 күн бұрын

@@jorenheit How old is he currently? ^^

@jorenheit 19 күн бұрын

@@alexander3293no clue :p

@thesergey 19 күн бұрын

@@alexander3293 33/34

@SuperPhilope 19 күн бұрын

If the camera is not parallel to the paper, then the cells are not all the same size. The step size along x needs to respect the change in y size and vice versa. It's not a linear transformation because we don't know the z component i think.

@LetterlessAlphabet 19 күн бұрын

Not sure I understand why the grid is "skewed" this may require a second viewing. 😅

@LetterlessAlphabet 19 күн бұрын

OHHHH Now I get it. It's literally skewed in relation to the image.... why not just process the image first? not as fun? lol

@YusmanGaming 19 күн бұрын

I think tsoding means that grid is skewed because it is slightly rotated in the image, not perfectly aligned with the edges of the image

@briket_ 18 күн бұрын

tsoding is furry drawer 3:16

@b-rosa 18 күн бұрын

My thoughts exactly haha

@devit6122 18 күн бұрын

"I wrote in Russian, and i dont know Why"... could it be that you are Russian? Or that you were drunk that day

@bbq1423 13 күн бұрын

5:46 Good thing it's made in Moscow and not Siberia ☭

@pldvs 19 күн бұрын

Easter Eggs 😂 aHR0cHM6Ly9maWxlcy5jYXRib3gubW9lL21zZmw5MS5tcDQK

@thesergey 19 күн бұрын

my man casually dropping one of the most valuable life lessons here

@epicujjwal 19 күн бұрын

1 minute and no views bro fell off

@user-qq4pz6je6i 18 күн бұрын

this reminds me a defcon talk where a pair of guys decapped some rom chips and used software to read their contents from images of the die in a similar way to what youre doing. very neat. kzfaq.info/get/bejne/bbdoZamc2c6oqGw.html